  
  [1X5 [33X[0;0YOverview of updates for [5XGAP[105X[101X[1X 4.4[133X[101X
  
  [33X[0;0YThis chapter lists changes in the main system (excluding packages) that have
  been corrected or added in bugfixes and updates for [5XGAP[105X 4.4.[133X
  
  
  [1X5.1 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Bugfix 2 (April 2004)[133X[101X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YA crash when incorrect types of arguments are passed to [10XFileString[110X.[133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YA bug in [10XDerivedSubgroupTom[110X and [10XDerivedSubgroupsTom[110X.[133X
  
  [30X    [33X[0;6YAn error in the inversion of certain [10XZmodnZObj[110X elements.[133X
  
  [30X    [33X[0;6YA wrong display string of the numerator in rational functions returned
        by  [10XMolienSeriesWithGivenDenominator[110X  (in  the  case that the constant
        term of this numerator is zero).[133X
  
  
  [1X5.2 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Bugfix 3 (May 2004)[133X[101X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YIncorrect  setting  of  system  variables  (e.g.,  home  directory and
        command line options) after loading a workspace.[133X
  
  [30X    [33X[0;6YWrong handling of integer literals within functions or loops on 64-bit
        architectures (only integers in the range from [22X2^28[122X to [22X2^60[122X).[133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YA  problem  in  the  installation  of  the  multiplication routine for
        matrices   that  claimed  to  be  applicable  for  more  general  list
        multiplications.[133X
  
  [30X    [33X[0;6YA  problem when computing weight distributions of codes with weights >
        [22X2^28[122X.[133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YProblems with the online help with some manual sections.[133X
  
  [30X    [33X[0;6YProblems of the online help on Windows systems.[133X
  
  [30X    [33X[0;6YA  problem  in [10XGQuotients[110X when mapping from a finitely presented group
        which has a free direct factor.[133X
  
  [30X    [33X[0;6YA bug in the function [10XDisplayRevision[110X.[133X
  
  [30X    [33X[0;6YThe  trivial  finitely  presented  group  on  no  generators  was  not
        recognized as finitely presented.[133X
  
  [30X    [33X[0;6YA problem with [10XProcess[110X.[133X
  
  [30X    [33X[0;6YA  problem  when  intersecting  subgroups of finitely presented groups
        that  are represented in [21Xquotient representation[121X with the quotient not
        apermutation group.[133X
  
  [30X    [33X[0;6YA  bug  in  the generic [10XIntersection2[110X method for vector spaces, in the
        case that both spaces are trivial.[133X
  
  [30X    [33X[0;6YEnable ReeGroup(q) for [22Xq = 3[122X.[133X
  
  
  [1X5.3 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Bugfix 4 (December 2004)[133X[101X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YAn error in the [10XOrder[110X method for matrices over cyclotomic fields which
        caused  this method to return [10Xinfinity[110X for matrices of finite order in
        certain cases.[133X
  
  [30X    [33X[0;6YRepresentations     computed    by    [10XIrreducibleRepresentations[110X    in
        characteristic 0 erraneously claimed to be faithful.[133X
  
  [30X    [33X[0;6YA  primitive  representation  of  degree  574  for  PSL(2,41) has been
        missing in the classification on which the [5XGAP[105X library was built.[133X
  
  [30X    [33X[0;6YA  bug  in  [10XAppend[110X for compressed vectors over GF(2): if the length of
        the result is 1 mod 32 (or 64) the last entry was forgotten to copy.[133X
  
  [30X    [33X[0;6YA  problem  with  the  Ree  group  Ree(3)  of size 1512 claiming to be
        simple.[133X
  
  [30X    [33X[0;6YAn  error  in  the  membership test for groups GU(n,q) and SU(n,q) for
        non-prime [22Xq[122X.[133X
  
  [30X    [33X[0;6YAn  error in the kernel code for ranges which caused e.g. [10X-1 in [1..2][110X
        to return [9Xtrue[109X.[133X
  
  [30X    [33X[0;6YAn error recording boolean lists in saved workspaces.[133X
  
  [30X    [33X[0;6YA  problem  in  the  selection  function  for primitive and transitive
        groups if no degree is given.[133X
  
  [30X    [33X[0;6Y[10XReducedConfluentRewritingSystem[110X  returning  a cached result that might
        not conform to the ordering specified.[133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YA  problem  with  the  function  [10XSuggestUpdates[110X  to check for the most
        recent version of packages available.[133X
  
  [30X    [33X[0;6YA  problem  that  caused  [10XMatrixOfAction[110X  to produce an error when the
        algebra module was constructed as a direct sum.[133X
  
  [30X    [33X[0;6YProblems  with  computing [22Xn[122X-th power maps of character tables, where n
        is  negative  and  the  table  does  not  yet  store  its  irreducible
        characters.[133X
  
  [30X    [33X[0;6YElement  conjugacy  in  large-base  permutation  groups  sometimes was
        unnecessarily inefficient.[133X
  
  [30X    [33X[0;6YA missing method for getting the letter representation of an associate
        word in straight line program representation.[133X
  
  [30X    [33X[0;6YA  problem with the construction of vector space bases where the given
        list of basis vectors is itself an object that was returned by [10XBasis[110X.[133X
  
  [30X    [33X[0;6YA  problem  of  [10XAbelianInvariantsMultiplier[110X insisting that a result of
        [10XIsomorphismFpGroup[110X is known to be surjective.[133X
  
  [30X    [33X[0;6YAn  error  in  the routine for [10XResultant[110X if one of the polynomials has
        degree zero.[133X
  
  
  [1X5.4 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 5 (May 2005)[133X[101X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6Y[2XGroupWithGenerators[102X   ([14XReference:   GroupWithGenerators[114X)   returned  a
        meaningless  group  object  instead  of signaling an error when it was
        called with an empty list of generators.[133X
  
  [30X    [33X[0;6YWhen  computing  preimages under an embedding into a direct product of
        permutation  groups,  if  the  element  was  not  in  the image of the
        embedding then a permutation had been returned instead of [10Xfail[110X.[133X
  
  [30X    [33X[0;6YTwo  problems  with  [2XPowerMod[102X  ([14XReference:  PowerMod[114X) for polynomials.
        [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6YSome  methods  for  computing  the  sum  of  ideals returned the first
        summand instead of the sum. [Reported by Alexander Konovalov][133X
  
  [30X    [33X[0;6YWrong result in [2XIntersection[102X ([14XReference: Intersection[114X) for pc groups.[133X
  
  [30X    [33X[0;6YThe  function [2XCompareVersionNumbers[102X ([14XReference: CompareVersionNumbers[114X)
        erroneously ignored leading non-digit characters.[133X
  
        [33X[0;6YA  new  feature in the corrected version is an optional third argument
        [10X"equal"[110X,  which  causes  the function to return [10Xtrue[110X only if the first
        two   arguments  describe  equal  version  numbers;  documentation  is
        available  in  the ext-manual. This new feature is used in [2XLoadPackage[102X
        ([14XReference:  LoadPackage[114X), now one can require a specific version of a
        package.[133X
  
        [33X[0;6YThe  library  code still contained parts of the handling of completion
        files for packages, which does not work and therefore had already been
        removed from the documentation. This code has now been removed.[133X
  
        [33X[0;6YNow a new component [10XPreloadFile[110X is supported in [2XThe PackageInfo.g File[102X
        ([14XReference:  The  PackageInfo.g  File[114X)  files; if it is bound then the
        file  in  question  is  read  immediately  before  the  package or its
        documentation is loaded.[133X
  
  [30X    [33X[0;6YThe   result   of  [2XString[102X  ([14XReference:  String[114X)  for  strings  not  in
        [2XIsStringRep[102X  ([14XReference:  IsStringRep[114X)  that  occur as list entries or
        record components was erroneously missing the double quotes around the
        strings.[133X
  
  [30X    [33X[0;6YA  bug  which  caused [2XInducedPcgs[102X ([14XReference: InducedPcgs[114X) to return a
        pcgs which is not induced wrt. the parent pcgs of [10Xpcgs[110X. This may cause
        unpredictable   behaviour,   e. g.   when   [10XSiftedPcElement[110X   is  used
        subsequently. [Reported by Alexander Konovalov][133X
  
  [30X    [33X[0;6YFixed a bug in [10XSmallGroupsInformation(512)[110X.[133X
  
  [30X    [33X[0;6Y[2XPowerModCoeffs[102X   ([14XReference:   PowerModCoeffs[114X)  with  exponent  1  for
        compressed  vectors did not reduce (a copy of) the input vector before
        returning it. [Reported by Frank Lübeck][133X
  
  [30X    [33X[0;6YSorting  a  mutable  non-plain  list  (e.g.,  a compressed matrix over
        fields  of  order  <  257)  could  potentially  destroy  that  object.
        [Reported by Alexander Hulpke][133X
  
  [30X    [33X[0;6YUnder  rare circumstances computing the closure of a permutation group
        by  a  normalizing element could produce a corrupted stabilizer chain.
        (The underlying algorithm uses random elements, probability of failure
        was below 1 percent). [Reported by Thomas Breuer][133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YSome  code  and  comments  in  the [5XGAP[105X kernel assumed that there is no
        garbage  collection during the core printing function [10XPr[110X, which is not
        correct.  This  could cause [5XGAP[105X in rare cases to crash during printing
        permutations,  cyclotomics  or  strings  with zero bytes. [Reported by
        Warwick Harvey][133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YA  rare  problem  with  the  choice  of  prime  in the Dixon-Schneider
        algorithm  for  computing the character table of a group. [Reported by
        Jack Schmidt][133X
  
  [30X    [33X[0;6Y[2XDirectProduct[102X   ([14XReference:  DirectProduct[114X)  for  trivial  permutation
        groups returned a strange object.[133X
  
  [30X    [33X[0;6YA  problem  with  [2XPolynomialReduction[102X ([14XReference: PolynomialReduction[114X)
        running into an infinite loop.[133X
  
  [30X    [33X[0;6YAdding  linear mappings with different image domains was not possible.
        [Reported by Pasha Zusmanovich][133X
  
  [30X    [33X[0;6YMultiplying  group  ring  elements  with  rationals  was not possible.
        [Reported by Laurent Bartholdi][133X
  
  [30X    [33X[0;6Y[2XRandom[102X ([14XReference: Random Sources[114X) now works for finite fields of size
        larger than [22X2^28[122X. [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6YUnivariate polynomial creators did modify the coefficient list passed.
        [Reported by Jürgen Müller][133X
  
  [30X    [33X[0;6YFixed  [2XIntHexString[102X  ([14XReference: IntHexString[114X) to accept arguments not
        in  [10XIsStringRep[110X;  the  argument  is  now first converted if necessary.
        [Reported by Kenn Heinrich][133X
  
  [30X    [33X[0;6YThe  library  code for stabilizer chains contained quite some explicit
        references  to  the identity [10X()[110X. This is unfortunate if one works with
        permutation  groups,  the elements of which are not plain permutations
        but objects which carry additional information like a memory, how they
        were  obtained  from  the  group generators. For such cases it is much
        cleaner  to  use  the  [10XOne(...)[110X operation instead of [10X()[110X, such that the
        library code can be used for a richer class of group objects. This fix
        contains  only  rather  trivial  changes  [10X()[110X  to  [10XOne(...)[110X  which were
        carefully  checked  by  me.  The  tests for permutation groups all run
        without a problem. However, it is relatively difficult to provide test
        code for this particular change, since the "improvement" only shows up
        when  one generates new group objects. This is for example done in the
        package  [5Xrecog[105X  which  is in preparation. [Reported by Akos Seress and
        Max Neunhöffer][133X
  
  [30X    [33X[0;6YUsing  [10X{}[110X  to  select  elements  of  a  known  inhomogenous dense list
        produced  a  list  that  might falsely claim to be known inhomogenous,
        which  could  lead to a segfault if the list typing code tried to mark
        it homogenous, since the code intended to catch such errors also had a
        bug. [Reported by Steve Linton][133X
  
  [30X    [33X[0;6YThe  record for the generic iterator construction of subspaces domains
        of non-row spaces was not complete.[133X
  
  [30X    [33X[0;6YWhen  a  workspace has been created without packages([10X-A[110X option) and is
        loaded into a [5XGAP[105X session without packages (same option) then an error
        message is printed.[133X
  
  [30X    [33X[0;6YSo   far   the   functions   [2XIsPrimeInt[102X  ([14XReference:  IsPrimeInt[114X)  and
        [2XIsProbablyPrimeInt[102X ([14XReference: IsProbablyPrimeInt[114X) are essentially the
        same   except  that  [10XIsPrimeInt[110X  issues  an  additional  warning  when
        (non-proven) probable primes are considered as primes.[133X
  
        [33X[0;6YThese warnings now print the probable primes in question as well; if a
        probable  prime is used several times then the warning is also printed
        several  times;  there  is  no  longer  a warning for some known large
        primes;  the  warnings can be switched off. See [2XIsPrimeInt[102X ([14XReference:
        IsPrimeInt[114X) for more details.[133X
  
        [33X[0;6YIf  we  get  a  reasonable  primality  test  in [5XGAP[105X we will change the
        definition of [10XIsPrimeInt[110X to do a proper test.[133X
  
  [30X    [33X[0;6YCorrected  some  names  of primitive groups in degree 26. [Reported by
        Robert F. Bailey][133X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6YSeveral changes for [2XConwayPolynomial[102X ([14XReference: ConwayPolynomial[114X):[133X
  
        [30X    [33X[0;12Ymany new pre-computed polynomials[133X
  
        [30X    [33X[0;12Yput data in several separate files (only read when needed)[133X
  
        [30X    [33X[0;12Yadded info on origins of pre-computed polynomials[133X
  
        [30X    [33X[0;12Yimproved    performance    of    [2XConwayPolynomial[102X    ([14XReference:
              ConwayPolynomial[114X)    and    [2XIsPrimitivePolynomial[102X    ([14XReference:
              IsPrimitivePolynomial[114X) for p < 256[133X
  
        [30X    [33X[0;12Yimproved documentation of [10XConwayPolynomial[110X[133X
  
        [30X    [33X[0;12Yadded   and  documented  new  functions  [2XIsCheapConwayPolynomial[102X
              ([14XReference:             IsCheapConwayPolynomial[114X)             and
              [2XRandomPrimitivePolynomial[102X ([14XReference: RandomPrimitivePolynomial[114X)[133X
  
  [30X    [33X[0;6YAdded  method for [2XNormalBase[102X ([14XReference: NormalBase[114X) for extensions of
        finite fields.[133X
  
  [30X    [33X[0;6YAdded  more  help  viewers  for  the HTML version of the documentation
        (firefox, mozilla, konqueror, w3m, safari).[133X
  
  [30X    [33X[0;6YNew  function  [2XColorPrompt[102X  ([14XReference: ColorPrompt[114X). (Users of former
        versions   of   a   [10Xcolorprompt.g[110X   file:   Now   you   just   need  a
        [10XColorPrompt(true);[110X in your [10X.gaprc[110X file.)[133X
  
  [30X    [33X[0;6YSpecialised  kernel functions to support [5XGUAVA[105X 2.0. [5XGAP[105X will only load
        [5XGUAVA[105X in version at least 2.002 after this update.[133X
  
  [30X    [33X[0;6YNow  there  is  a  kernel  function  [10XCYC_LIST[110X for converting a list of
        rationals into a cyclotomic, without arithmetics overhead.[133X
  
  [30X    [33X[0;6YNew     functions     [2XContinuedFractionExpansionOfRoot[102X     ([14XReference:
        ContinuedFractionExpansionOfRoot[114X)                                  and
        [2XContinuedFractionApproximationOfRoot[102X                       ([14XReference:
        ContinuedFractionApproximationOfRoot[114X) for computing continued fraction
        expansions  and  continued  fraction  approximations  of real roots of
        polynomials with integer coefficients.[133X
  
  [30X    [33X[0;6YA  method  for  computing  structure  descriptions  for finite groups,
        available via [2XStructureDescription[102X ([14XReference: StructureDescription[114X).[133X
  
  [30X    [33X[0;6YThis  change  contains  the  new,  extended version of the [5XSmallGroups[105X
        package. For example, the groups of orders [22Xp^4[122X, [22Xp^5[122X, [22Xp^6[122X for arbitrary
        primes  [22Xp[122X, the groups of square-free order and the groups of cube-free
        order  at  most  50000 are included now. For more detailed information
        see the announcement of the extended package.[133X
  
  [30X    [33X[0;6YThe  function  [10XShowPackageVariables[110X  gives  an  overview of the global
        variables in a package. It is thought as a utility for package authors
        and referees. (It uses the new function [10XIsDocumentedVariable[110X.)[133X
  
  [30X    [33X[0;6YThe mechanisms for testing [5XGAP[105X has been improved:[133X
  
        [30X    [33X[0;12YThe  information  whether  a  test  file  belongs to the list in
              [10Xtst/testall.g[110X is now stored in the test file itself.[133X
  
        [30X    [33X[0;12YSome  targets for testing have been added to the [10XMakefile[110X in the
              [5XGAP[105X  root  directory,  the  output  of the tests goes to the new
              directory [10Xdev/log[110X.[133X
  
        [30X    [33X[0;12YUtility   functions   for   testing   are   in   the   new  file
              [10Xtst/testutil.g[110X. Now the loops over (some or all) files [10Xtst/*.tst[110X
              can   be   performed   with   a  function  call,  and  the  file
              [10Xtst/testall.g[110X   can   be   created   automatically;   the   file
              [10Xtst/testfull.g[110X  is  now  obsolete.  The  remormalization  of the
              scaling  factors  can  now  be done using a [5XGAP[105X function, so the
              file [10Xtst/renorm.g[110X is obsolete.[133X
  
        [30X    [33X[0;12YNow  the  functions  [10XSTART_TEST[110X  and [10XSTOP_TEST[110X use components in
              [10XGAPInfo[110X  instead of own globals, and the random number generator
              is always reset in [10XSTART_TEST[110X.[133X
  
        [30X    [33X[0;12Y[10XGAPInfo.SystemInformation[110X  now  takes two arguments, now one can
              use it easier in the tests.[133X
  
  [30X    [33X[0;6Y[2XMultiplicationTable[102X   ([14XReference:   MultiplicationTable[114X)   is  now  an
        attribute,  and  the  construction  of  a  magma,  monoid,  etc.  from
        multiplication tables has been unified.[133X
  
  
  [1X5.5 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 6 (September 2005)[133X[101X
  
  [33X[0;0YAttribution  of  bugfixes and improved functionalities to those who reported
  or provided these, respectively, is still fairly incomplete and inconsistent
  with this update. We apologise for this fact and will discuss until the next
  update how to improve this feature.[133X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YThe  perfect  group  library  does  not contain any information on the
        trivial  group,  so  the  trivial  group  must  be  handled specially.
        [2XPerfectGroup[102X ([14XReference: PerfectGroup[114X) and [10XNrPerfectLibraryGroups[110X were
        changed to indicate that the trivial group is not part of the library.[133X
  
  [30X    [33X[0;6YThe  descriptions of [10XPerfectGroup(734832,3)[110X and [10XPerfectGroup(864000,3)[110X
        were corrected in the [2XFinite Perfect Groups[102X ([14XReference: Finite Perfect
        Groups[114X) library of perfect groups.[133X
  
  [30X    [33X[0;6YThe functions [2XEpimorphismSchurCover[102X ([14XReference: EpimorphismSchurCover[114X)
        and               [2XAbelianInvariantsMultiplier[102X              ([14XReference:
        AbelianInvariantsMultiplier[114X)  may  have produced wrong results without
        warning  [Reported  by  Colin  Ingalls].  These  problems  are  fixed.
        However,  the methods currently used can be expected to be slower than
        the ones used before; we hope to fix this in the next version of [5XGAP[105X.[133X
  
  [30X    [33X[0;6Y[2XDerivedSubgroup[102X  ([14XReference:  DerivedSubgroup[114X)  and [2XCommutatorSubgroup[102X
        ([14XReference:   CommutatorSubgroup[114X)  for  permutation  groups  sometimes
        returned  groups  with  an incorrect stabilizer chain due to a missing
        verification step after a random Schreier Sims.[133X
  
  [30X    [33X[0;6Y[2XNaturalHomomorphismByNormalSubgroup[102X                        ([14XReference:
        NaturalHomomorphismByNormalSubgroup[114X)   for  FpGroups  did  unnecessary
        rewrites.[133X
  
  [30X    [33X[0;6YThe alternating group [22XA_3[122X incorrectly claimed to be not simple.[133X
  
  [30X    [33X[0;6Y[2XExponentSyllable[102X   ([14XReference:  ExponentSyllable[114X)  for  straight  line
        program elements gave a wrong result.[133X
  
  [30X    [33X[0;6Y[2XPrimePGroup[102X  ([14XReference:  PrimePGroup[114X)  is  defined to return [10Xfail[110X for
        trivial  groups,  but  if  the  group  was  constructed as a factor or
        subgroup of a known [22Xp[122X-group, the value of [22Xp[122X was retained.[133X
  
  [30X    [33X[0;6YThe        functions        [2XTestPackageAvailability[102X        ([14XReference:
        TestPackageAvailability[114X)  and [2XLoadPackage[102X ([14XReference: LoadPackage[114X) did
        not  work  correctly  when  one  asked for a particular version of the
        package,  via  a  version number starting with the character [10X=[110X, in the
        sense that a version with a larger version number was loaded if it was
        available. [Reported by Burkhard Höfling][133X
  
  [30X    [33X[0;6YThe   generator   names   constructed  by  [2XAlgebraByStructureConstants[102X
        ([14XReference: AlgebraByStructureConstants[114X) were nonsense.[133X
  
  [30X    [33X[0;6YThe   undocumented  function  (but  recently  advertised  on  gap-dev)
        [10XCOPY_LIST_ENTRIES[110X  did  not  handle overlapping source and destination
        areas correctly in some cases.[133X
  
  [30X    [33X[0;6YThe elements in a free magma ring have the filter [2XIsAssociativeElement[102X
        ([14XReference:  IsAssociativeElement[114X)  set  whenever  the elements in the
        underlying  magma  and  in the coefficients ring have this filter set.
        [Reported by Randy Cone][133X
  
  [30X    [33X[0;6YThe  function  [2XInstallValue[102X ([14XReference: InstallValue[114X) must not be used
        for  objects in the filter [10XIsFamily[110X because these objects are compared
        via  [2XIsIdenticalObj[102X  ([14XReference:  IsIdenticalObj[114X).  [Reported  by  Max
        Neunhöffer][133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YProblem in composition series for permutation groups for non-Frobenius
        groups with regular point stabilizer.[133X
  
  [30X    [33X[0;6YAfter   lots   of  computations  with  compressed  GF(2)  vectors  [5XGAP[105X
        occasionally  crashed.  The  reason were three missing [10XCHANGED_BAG[110Xs in
        [10XSemiEchelonPListGF2Vecs[110X.   They   were   missing,  because  a  garbage
        collection  could  be triggered during the computation such that newly
        created bags could become [21Xold[121X. It is not possible to provide test code
        because  the error condition cannot easily be reproduced. [Reported by
        Klaus Lux][133X
  
  [30X    [33X[0;6YMinor  bug  that  crashed  [5XGAP[105X:  The type of [10XIMPLICATIONS[110X could not be
        determined in a fresh session. [Reported by Marco Costantini][133X
  
  [30X    [33X[0;6Y[2XAssert[102X  ([14XReference:  Assert[114X)  caused an infinite loop if called as the
        first line of a function called from another function.[133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YWrong choice of prime in Dixon-Schneider if prime is bigger than group
        order (if group has large exponent).[133X
  
  [30X    [33X[0;6YGroebner   basis  code  ran  into  problems  when  comparing  monomial
        orderings.[133X
  
  [30X    [33X[0;6YWhen  testing  for  conjugacy  of  a primitive group to an imprimitive
        group,[5XGAP[105X  runs  into an error in EARNS calculation. [Reported by John
        Jones][133X
  
  [30X    [33X[0;6YThe  centre  of  a magma is commonly defined to be the set of elements
        that  commute and associate with all elements. The previous definition
        left   out   [21Xassociate[121X   and   caused   problems  with  extending  the
        functionality to nonassociative loops. [Reported by Petr Vojtechovsky][133X
  
  [30X    [33X[0;6YNew  kernel methods for taking the intersection and difference between
        sets of substantially different sizes give a big performance increase.[133X
  
  [30X    [33X[0;6YThe         commands        [2XIsNaturalSymmetricGroup[102X        ([14XReference:
        IsNaturalSymmetricGroup[114X)   and  [2XIsNaturalAlternatingGroup[102X  ([14XReference:
        IsNaturalAlternatingGroup[114X)  are  faster and should run much less often
        into inefficient tests.[133X
  
  [30X    [33X[0;6YThe  perfect  group  library,  see  [2XFinite  Perfect Groups[102X ([14XReference:
        Finite  Perfect  Groups[114X), is split into several files which are loaded
        and unloaded to keep memory usage down. The global variable [10XPERFSELECT[110X
        is  a  blist  which  indicates  which  orders are currently loaded. An
        off-by-one  error  wrongly  added  the last order of the previous file
        into the list of valid orders when a new file was loaded. A subsequent
        access to this order raises an error.[133X
  
  [30X    [33X[0;6YUp  to  now,  the  method  installed  for  testing  the  membership of
        rationals  in  the field of rationals via [2XIsRat[102X ([14XReference: IsRat[114X) was
        not  called;  instead  a  more  general  method  was  used that called
        [2XConductor[102X  ([14XReference: Conductor (for a cyclotomic)[114X) and thus was much
        slower.  Now  the  special  method  has been ranked up by changing the
        requirements in the method installation.[133X
  
  [30X    [33X[0;6YFixed  a  bug  in [10XAPPEND_VEC8BIT[110X, which was triggered in the following
        situation:  Let  [10Xe[110X be the number of field elements stored in one byte.
        If  a  compressed  8bit-vector  [10Xv[110X  had  length  not divisible by [10Xe[110X and
        another  compressed  8-bit vector [10Xw[110X was appended, such that the sum of
        the  lengths  became  divisible  by  [10Xe[110X,  then  one 0 byte too much was
        written,  which  destroyed  the [10XTNUM[110X of the next [5XGAP[105X object in memory.
        [Reported by Klaus Lux][133X
  
  [30X    [33X[0;6Y[2XPermutationCycle[102X  ([14XReference:  PermutationCycle[114X)  returned [10Xfail[110X if the
        cycle  was  not a contiguous subset of the specified domain. [Reported
        by Luc Teirlinck][133X
  
  [30X    [33X[0;6YNow  [2XInverse[102X  ([14XReference: Inverse[114X) correctly returns [10Xfail[110X for zeros in
        finite fields (and does no longer enter a break loop).[133X
  
  [30X    [33X[0;6YUp  to now, [2XCharacterDegrees[102X ([14XReference: CharacterDegrees[114X) ignored the
        attribute  [2XIrr[102X  ([14XReference: Irr[114X) if the argument was a group that knew
        that it was solvable.[133X
  
  [30X    [33X[0;6YThe  function  [10XDebug[110X now prints a meaningful message if the user tries
        to  debug an operation. Also, the help file for [10Xvi[110X is now available in
        the case of several [5XGAP[105X root directories.[133X
  
  [30X    [33X[0;6YIt  is  no  longer  possible  to  create corrupt objects via ranges of
        length  >[22X2^28[122X,  resp.  >[22X2^60[122X  (depending  on  the  architecture).  The
        limitation concerning the arguments of ranges is documented. [Reported
        by Stefan Kohl][133X
  
  [30X    [33X[0;6YNow    [2XIsElementaryAbelian[102X    ([14XReference:   IsElementaryAbelian[114X)   and
        [2XClassPositionsOfMinimalNormalSubgroups[102X                     ([14XReference:
        ClassPositionsOfMinimalNormalSubgroups[114X)  are  available  for  ordinary
        character    tables.   Now   the   operation   [2XCharacterTableIsoclinic[102X
        ([14XReference:  CharacterTableIsoclinic[114X)  is  an  attribute, and there is
        another     new     attribute    [2XSourceOfIsoclinicTable[102X    ([14XReference:
        SourceOfIsoclinicTable[114X)  that  points back to the original table; this
        is  used  for  computing  the  Brauer  tables  of  those tables in the
        character     table     library     that     are     computed    using
        [10XCharacterTableIsoclinic[110X.      Now      [2XClassPositionsOfDerivedSubgroup[102X
        ([14XReference:   ClassPositionsOfDerivedSubgroup[114X)   avoids   calling  [2XIrr[102X
        ([14XReference: Irr[114X), since [2XLinearCharacters[102X ([14XReference: LinearCharacters[114X)
        is sufficient. Now [2XClassPositionsOfElementaryAbelianSeries[102X ([14XReference:
        ClassPositionsOfElementaryAbelianSeries[114X)  works  also for the table of
        the  trivial  group.  Restrictions of character objects know that they
        are characters.[133X
  
        [33X[0;6YA  few  formulations  in the documentation concerning character tables
        have been improved slightly.[133X
  
  [30X    [33X[0;6YUp  to  now,  [2XIsPGroup[102X  ([14XReference: IsPGroup[114X) has rarely been set. Now
        many basic operations such as [2XSylowSubgroup[102X ([14XReference: SylowSubgroup[114X)
        set this attribute on the returned result.[133X
  
  [30X    [33X[0;6YComputing an enumerator for a semigroup required too much time because
        it  used  all  elements  instead of the given generators. [Reported by
        Manuel Delgado][133X
  
  [30X    [33X[0;6YAvoid potential error message when working with automorphism groups.[133X
  
  [30X    [33X[0;6YFixed wrong page references in manual indices.[133X
  
  [30X    [33X[0;6YMake [10XMutableCopyMat[110X an operation and install the former function which
        does   call  [2XList[102X  ([14XReference:  Lists[114X)  with  [2XShallowCopy[102X  ([14XReference:
        ShallowCopy[114X)  the  default  method  for  lists. Also use this in a few
        appropriate places.[133X
  
  [30X    [33X[0;6YAn  old  DEC  compiler doesn't like C preprocessor directives that are
        preceded  by  whitespace.  Removed such whitespace. [Reported by Chris
        Wensley][133X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6YThe primitive groups library has been extended to degree 2499.[133X
  
  [30X    [33X[0;6YNew operation [2XRemove[102X ([14XReference: Remove[114X) and extended functionality of
        [2XAdd[102X  ([14XReference: Add[114X) with an optional argument giving the position of
        the  insertion.  They  are  based  on  an  efficient  kernel  function
        [10XCOPY_LIST_ENTRIES[110X.[133X
  
  [30X    [33X[0;6YAdded  fast  kernel  implementation of Tarjan's algorithm for strongly
        connected components of a directed graph.[133X
  
  [30X    [33X[0;6YNow  [2XIsProbablyPrimeInt[102X  ([14XReference:  IsProbablyPrimeInt[114X)  can be used
        with    larger    numbers.    (Made   internal   function   [10XTraceModQF[110X
        non-recursive.)[133X
  
  [30X    [33X[0;6YA  new  operation  [2XPadicValuation[102X  ([14XReference:  PadicValuation[114X)  and a
        corresponding method for rationals.[133X
  
  [30X    [33X[0;6YA new operation [2XPartialFactorization[102X ([14XReference: PartialFactorization[114X)
        has  been  added,  and  a  corresponding  method for integers has been
        installed.  This method allows one to specify the amount of work to be
        spent on looking for factors.[133X
  
  [30X    [33X[0;6YThe generators of full s. c. algebras can now be accessed with the dot
        operator. [Reported by Marcus Bishop][133X
  
  [30X    [33X[0;6YNew  Conway  polynomials  computed  by Kate Minola, John Bray, Richard
        Parker.[133X
  
  [30X    [33X[0;6YA      new      attribute     [2XEpimorphismFromFreeGroup[102X     ([14XReference:
        EpimorphismFromFreeGroup[114X).  The  code  has  been  written by Alexander
        Hulpke.[133X
  
  [30X    [33X[0;6YThe  functions [2XLambda[102X ([14XReference: Lambda[114X), [2XPhi[102X ([14XReference: Phi[114X), [2XSigma[102X
        ([14XReference:  Sigma[114X),  and  [2XTau[102X  ([14XReference: Tau[114X) have been turned into
        operations,  to  admit the installation of methods for arguments other
        than integers.[133X
  
  [30X    [33X[0;6YUp  to  now,  one  could  assign only lists with [2XInstallFlushableValue[102X
        ([14XReference: InstallFlushableValue[114X). Now also records are admitted.[133X
  
  [30X    [33X[0;6Y[2XInstallMethod[102X ([14XReference: InstallMethod[114X) now admits entering a list of
        strings  instead  of a list of required filters. Each such string must
        evaluate  to  a  filter  when  used  as  the  argument  of  [2XEvalString[102X
        ([14XReference:  EvalString[114X).  The advantage of this variant is that these
        strings  are  used  to  compose  an  info  string  (which  is shown by
        [10XApplicableMethod[110X) that reflects exactly the required filters.[133X
  
  [30X    [33X[0;6YIn  test  files that are read with [2XReadTest[102X ([14XReference: ReadTest[114X), the
        assertion level is set to 2 between [10XSTART_TEST[110X and [10XSTOP_TEST[110X. This may
        result  in  runtimes  for the tests that are substantially longer than
        the  usual runtimes with default assertion level 0. In particular this
        is the reason why some of the standard test files require more time in
        [5XGAP[105X 4.4.6 than in [5XGAP[105X 4.4.5.[133X
  
  [30X    [33X[0;6YSome very basic functionality for floats.[133X
  
  
  [1X5.6 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 7 (March 2006)[133X[101X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6YThe  [2XDisplay[102X  ([14XReference:  Display[114X) functionality for character tables
        has  been  extended  by  addition  of an option to show power maps and
        centralizer  orders  in  a  format  similar to that used in the ATLAS.
        Furthermore  the  options  handling  is  now hierarchical, in order to
        admit more flexible overloading.[133X
  
  [30X    [33X[0;6YFor      the     function     [2XLowIndexSubgroupsFpGroup[102X     ([14XReference:
        LowIndexSubgroupsFpGroup[114X),   there   is   now   an   iterator  variant
        [10XLowIndexSubgroupsFpGroupIterator[110X.   [Suggested   (and  based  on  code
        contributed) by Michael Hartley][133X
  
  [30X    [33X[0;6YSemigroup functionality in [5XGAP[105X has been improved and extended. Green's
        relations  are now stored differently, making the system more amenable
        to  new  methods for computing these relations in special cases. It is
        now  possible  to calculate Green's classes etc. without computing the
        entire   semigroup   or   necessarily   loading  the  package  [5XMONOID[105X.
        Furthermore,  the  Froidure-Pin  algorithm has now been implemented in
        [5XGAP[105X.[133X
  
  [30X    [33X[0;6YFunctionality  for  creating  free  products of any list of groups for
        which  a  finite  presentation  can be determined had been added. This
        function  returns  a  finitely  presented  group.  This  functionality
        includes the [10XEmbedding[110X operation. As an application of this new code a
        specialized  direct  product  operation  has  been  added for finitely
        presented  groups  which  returns  a  finitely  presented  group. This
        application includes [10XEmbedding[110X and [10XProjection[110X functionality.[133X
  
  [30X    [33X[0;6YSome new Straight Line Program (SLP) functionality has been added. The
        new  functions take given SLPs and create new ones by restricting to a
        subset  of the results, or to an intermediate result or by calculating
        the product of the results of two SLPs.[133X
  
  [30X    [33X[0;6YNew  code has been added to allow group elements with memory; that is,
        they  store automatically how they were derived from some given set of
        generators.  Note  that  there  is  not  yet  documentation  for  this
        functionality, but some packages already use it.[133X
  
  [30X    [33X[0;6YNew  code  has been added to handle matrices and vectors in such a way
        that they do not change their representation in a generic manner.[133X
  
  [30X    [33X[0;6YThe [2XIrr[102X ([14XReference: Irr[114X) method for [22Xp[122X-solvable [22Xp[122X-modular Brauer tables
        now keeps the order of the irreducibles in the ordinary table.[133X
  
  [30X    [33X[0;6Y[5XGAP[105X can now handle any finite field for which the Conway polynomial is
        known or can be computed.[133X
  
  [30X    [33X[0;6YNew Conway polynomials provided by John Bray and Kate Minola have been
        added.[133X
  
  [30X    [33X[0;6YThe [2XReadTest[102X ([14XReference: ReadTest[114X) methods for strings (filenames) and
        streams  now  automatically  set  the  screen  width  (see  [2XSizeScreen[102X
        ([14XReference:  SizeScreen[114X))  to  80  before  the  tests,  and  reset  it
        afterwards.[133X
  
  [30X    [33X[0;6YNow a few more checks are done during the [10Xconfigure[110X phase of compiling
        for  future  use  of some I/O functions of the C-library in a package.
        Also  the path to the [5XGAP[105X binaries for the [5XGAP[105X compiler is now handled
        via autoconf. Finally, now [10Xautoconf[110X version 2.59 is used.[133X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YSome  technical  errors  in  the  functions for compressed vectors and
        matrices  which  could  lead to corruption of internal data structures
        and  so to crashes or conceivably to wrong results. [Reported by Roman
        Schmied][133X
  
  [30X    [33X[0;6YA  potential  problem  in  the  generic  method  for  the undocumented
        operation   [10XDirectFactorsOfGroup[110X:   It   was   silently  assumed  that
        [2XNormalSubgroups[102X  ([14XReference:  NormalSubgroups[114X)  delivers  the  trivial
        subgroup  as  first and the whole group as last entry of the resulting
        list.[133X
  
  [30X    [33X[0;6YThe  code for sublists of compressed vectors created by [10Xvec{range}[110X may
        write  one  byte  beyond  the  space  allocated  for  the  new vector,
        overwriting  part  of the next object in the workspace. Thanks to Jack
        Schmidt for narrowing down the problem.[133X
  
  [30X    [33X[0;6YGiven  a class function object of value zero, an [2XArithmetic Operations
        for  Class  Functions[102X  ([14XReference:  Arithmetic  Operations  for  Class
        Functions[114X)  method  for  a  class  function erroneously did not return
        [10Xfail[110X. [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6YThe  [2XArithmetic  Operations for Class Functions[102X ([14XReference: Arithmetic
        Operations   for   Class   Functions[114X)  method  for  a  class  function
        erroneously returned a finite number if one of the values was nonreal,
        not a cyclotomic integer, and had norm 1.[133X
  
  [30X    [33X[0;6YTwo  missing  perfect  groups  were  added, and the permutation degree
        lowered  on  the perfect groups with the largest degrees. [Reported by
        Jack Schmidt][133X
  
  [30X    [33X[0;6YWhen  a  character  table was displayed with [2XPrinting Character Tables[102X
        ([14XReference:   Printing   Character   Tables[114X),  the  centralizer  order
        displayed  for  the  first  class  shown was not correct if it did not
        involve all prime divisors of the group. [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6YThe   first   argument   of   the   function  [2XVectorSpace[102X  ([14XReference:
        VectorSpace[114X)  must  be a field. This is checked from now on. [Reported
        by Laurent Bartholdi][133X
  
  [30X    [33X[0;6YUp  to  now, it was possible to create a group object from a semigroup
        of  cyclotomics using [2XAsGroup[102X ([14XReference: AsGroup[114X), although groups of
        cyclotomics are not admissible. [Reported by Alexander Konovalov][133X
  
  [30X    [33X[0;6YThe  documentation of [10XCharacteristicPolynomial(F,mat)[110X was ambiguous if
        [10XFieldOfMatrix(mat)  <=  F  < DefaultFieldOfMatrix(mat)[110X. In particular,
        the result was representation dependent. This was fixed by introducing
        a  second  field which specifies the vector space which mat acts upon.
        [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6Y[10XAssociatedReesMatrixSemigroupOfDClass[110X  produced  an incorrect sandwich
        matrix for the semigroup created. This matrix is an attribute set when
        creating  the  Rees  matrix semigroup but is not used for creating the
        semigroup.  The  incorrect result was returned when [10XSandwichMatrix[110X was
        called. [Reported by Nelson Silva and Joao Araujo][133X
  
  [30X    [33X[0;6YThe  literal  [10X"compiled"[110X was given an incorrect length. The kernel was
        then  unable  to  find  compiled  library  code as the search path was
        incorrect.  Also  the  documentation  example had an error in the path
        used to invoke the [11Xgac[111X compiler.[133X
  
  [30X    [33X[0;6YThe  twisting  group  in  a  generic  wreath  product  might  have had
        intransitive action. [Reported by Laurent Bartholdi][133X
  
  [30X    [33X[0;6YThere was an arithmetic bug in the polynomial reduction code.[133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YBug  1  in  the  list  of fixed bugs which could lead to wrong results
        could also potentially lead to crashes.[133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YThe  matrices  of  invariant  forms stored as values of the attributes
        [2XInvariantBilinearForm[102X        ([14XReference:       InvariantBilinearForm[114X),
        [2XInvariantQuadraticForm[102X    ([14XReference:   InvariantQuadraticForm[114X),   and
        [2XInvariantSesquilinearForm[102X  ([14XReference: InvariantSesquilinearForm[114X), for
        matrix  groups  over finite fields, are now in the (compressed) format
        returned by [2XImmutableMatrix[102X ([14XReference: ImmutableMatrix[114X).[133X
  
  [30X    [33X[0;6Y[10XString[110X  now  returns  an  immutable  string,  by  making a copy before
        changing the argument.[133X
  
  [30X    [33X[0;6Y[10Xpermutation^0[110X  and [10Xpermutation^1[110X were not handled with special code in
        the  kernel,  hence  were very slow for big permutations. [Reported by
        Max Neunhöffer][133X
  
  [30X    [33X[0;6YAdded  code  to  cache  the induced pcgs for an arbitrary parent pcgs.
        (This code was formerly part of the [5XCRISP[105X package.)[133X
  
  [30X    [33X[0;6YThis  fix  consists  of numerous changes to improve support for direct
        products,  including:  -  new methods for [10XPcgsElementaryAbelianSeries[110X,
        [10XPcgsChiefSeries[110X,  [10XExponentsOfPcElement[110X,  [10XDepthOfPcElement[110X  for  direct
        products  -  fixed [10XEnumeratorOfPcgs[110X to test for membership first - new
        methods  for  membership  test  in groups which have an induced pcgs -
        added  [10XGroupOfPcgs[110X  attribute  to  pcgs  in  various  methods  - fixed
        declarations   of  [10XPcgsElementaryAbelianSeries[110X,  [10XPcgsChiefSeries[110X  (the
        declared argument was a pcgs, not a group) [Reported by Roman Schmied][133X
  
  [30X    [33X[0;6YCorrected   a   term   ordering   problem  encountered  by  the  basis
        construction code for finite dimensional vector spaces of multivariate
        rational functions. [Reported by Jan Draisma][133X
  
  [30X    [33X[0;6YWhen  the  factor  of  a finite dimensional group ring by an ideal was
        formed, a method intended for free algebras modulo relations was used,
        and  the  returned  factor algebra could be used for (almost) nothing.
        [Reported by Heiko Dietrich][133X
  
  [30X    [33X[0;6YUp  to  now, [2XPowerMap[102X ([14XReference: PowerMap[114X) ran into an error when one
        asked  for  the  n-th  power map where n was not a small integer. This
        happened  in  some  [5XGAP[105X  library  functions  if  the  exponent  of the
        character table in question was not a small integer.[133X
  
  [30X    [33X[0;6YUp  to now, the test whether a finite field element was contained in a
        group  of  finite  field elements ran into an error if the element was
        not  in  the field generated by the group elements. [Reported by Heiko
        Dietrich][133X
  
  [30X    [33X[0;6YConjugacy  classes  of  natural (special) linear groups are now always
        returned with trivial class first.[133X
  
  [30X    [33X[0;6YUp   to   now,  it  could  happen  that  [2XCheckFixedPoints[102X  ([14XReference:
        CheckFixedPoints[114X)  reduced  an  entry in its second argument to a list
        containing  only  one  integer  but  did  not replace the list by that
        integer;  according  to  the  conventions,  this replacement should be
        done.[133X
  
  [30X    [33X[0;6YThe functions [10XPrintTo[110X and [10XAppendTo[110X did not work correctly for streams.
        [Reported by Marco Costantini][133X
  
  [30X    [33X[0;6YThe  function [10XBasis[110X did not return a value when it was called with the
        argument [10XRationals[110X. [Reported by Klaus Lux][133X
  
  [30X    [33X[0;6YFor certain matrix groups, the function [10XStructureDescription[110X raised an
        error  message.  The  reason  for  this  was that a trivial method for
        [10XIsGeneralLinearGroup[110X  for  matrix  groups  in  [10Xlib/grpmat.gi[110X  which is
        ranked  higher  than  the  nontrivial  method  for  generic  groups in
        [10Xlib/grpnames.gi[110X  called the operation [10XIsNaturalGL[110X, for which there was
        no nontrivial method available. [Reported by Nilo de Roock][133X
  
  [30X    [33X[0;6YAction  on  sets  of  length 1 was not correctly handled. [Reported by
        Mathieu Dutour][133X
  
  [30X    [33X[0;6YNow [10XWriteByte[110X admits writing zero characters to all streams. [Reported
        by Marco Costantini][133X
  
  [30X    [33X[0;6YThe  conjugacy test for subgroups tests for elementary abelian regular
        normal subgroup (EARNS) conjugacy. The fix will catch this in the case
        that the second group has no EARNS. [Reported by Andrew Johnson][133X
  
  [30X    [33X[0;6YSo far, the UNIX installation didn't result in a correct gap.sh if the
        installation  path  contained  space  characters. Now it should handle
        this case correctly, as well as other unusual characters in path names
        (except for double quotes).[133X
  
  
  [1X5.7 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 8 (September 2006)[133X[101X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6YA  function [2XPositions[102X ([14XReference: Positions[114X) with underlying operation
        [10XPositionsOp[110X,  which returns the list of all positions at which a given
        object appears in a given list.[133X
  
  [30X    [33X[0;6Y[2XLogFFE[102X  ([14XReference: LogFFE[114X) now returns [10Xfail[110X when the element is not a
        power of the base.[133X
  
  [30X    [33X[0;6YIt is now allowed to continue long integers, strings or identifiers by
        ending a line with a backslash or with a backslash and carriage return
        character.  So,  files with [5XGAP[105X code and DOS/Windows-style line breaks
        are now valid input on all architectures.[133X
  
  [30X    [33X[0;6YThe  command  line for starting the session and the system environment
        are     now     available     in     [10XGAPInfo.SystemCommandLine[110X     and
        [10XGAPInfo.SystemEnvironment[110X.[133X
  
  [30X    [33X[0;6YNames  of  all  bound  global  variables  and  all component names are
        available on [5XGAP[105X level.[133X
  
  [30X    [33X[0;6YAdded  a  few  new Conway polynomials computed by Kate Minola and John
        Bray.[133X
  
  [30X    [33X[0;6YThere   is  a  new  concept  of  [13Xrandom  sources[113X,  see  [2XIsRandomSource[102X
        ([14XReference:  IsRandomSource[114X),  which provides random number generators
        which  are  independent  of  each  other. There is kernel code for the
        Mersenne  twister random number generator (based on the code by Makoto
        Matsumoto                        distributed                        at
        [7Xhttp://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html[107X). It provides
        fast  32-bit  pseudorandom  integers with a period of length [22X2^19937-1[122X
        and a 623-dimensional equidistribution. The library methods for random
        elements  of  lists  and  for  random  (long)  integers  are using the
        Mersenne twister now.[133X
  
  [30X    [33X[0;6YIn  line  editing  mode  (usual input mode without -n option) in lines
        starting  with  [10Xgap>  [110X, [10X> [110X or [10Xbrk> [110X this beginning part is immediately
        removed. This is a convenient feature that allows one to cut and paste
        input  lines  from  other  sessions  or  from manual examples into the
        current session.[133X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YThe   function   [2XDecomposition[102X   ([14XReference:  Decomposition[114X)  returned
        coefficient  vectors  also  in  certain  situations  where  in fact no
        decomposition  exists. This happened only if the matrix entered as the
        first  argument  contained  irrational  values and a row in the matrix
        entered as the second argument did not respect the algebraic conjugacy
        relations  between  the columns of the first argument. So there was no
        problem for the usual cases that the two matrices are integral or that
        they are lists of Brauer characters. [Reported by Jürgen Müller][133X
  
  [30X    [33X[0;6YPC  group  homomorphisms  can  claim a wrong kernel after composition.
        [Reported by Serge Bouc][133X
  
  [30X    [33X[0;6YThe  return  value  of [2XOctaveAlgebra[102X ([14XReference: OctaveAlgebra[114X) had an
        inconsistent  defining  structure  constants  table  for  the  case of
        coefficients  fields  not  containing  the  integer zero. [Reported by
        Gábor Nagy][133X
  
  [30X    [33X[0;6YThe manual guarantees that a conjugator automorphism has a conjugating
        element in the group if possible. This was not guaranteed.[133X
  
  [30X    [33X[0;6Y[2XStabChain[102X  ([14XReference:  StabChain  (for  a  group (and a record))[114X) for
        symmetric  groups  gave a wrong result if fixed points were prescribed
        for base.[133X
  
  [30X    [33X[0;6YContrary  to  what  is documented the function [10XPOW_OBJ_INT[110X returned an
        immutable  result for [10XPOW_OBJ_INT(m,1)[110X for a mutable object [10Xm[110X. This is
        triggered by the code [10Xm^1[110X.[133X
  
  [30X    [33X[0;6Y[2XPseudoRandom[102X  ([14XReference:  PseudoRandom[114X)  for a group had a problem if
        the  group  had  lots  of equal generators. The produced elements were
        extremely  poorly  distributed in that case. This is now fixed for the
        case that elements of the group can easily be sorted.[133X
  
  [30X    [33X[0;6YFixed  the bug that the type of a boolean list (see [2XMore about Boolean
        Lists[102X ([14XReference: More about Boolean Lists[114X)) was computed wrongly: The
        type previously had [10XIS_PLIST_REP[110X instead of [10XIS_BLIST_REP[110X in its filter
        list.[133X
  
  [30X    [33X[0;6Y[2XOrbits[102X ([14XReference: Orbits[114X) did not respect a special [2XPositionCanonical[102X
        ([14XReference:   PositionCanonical[114X)   method   for   right  transversals.
        [Reported by Steve Costenoble][133X
  
  [30X    [33X[0;6YWrong  results for [2XGcdInt[102X ([14XReference: GcdInt[114X) for some arguments on 64
        bit systems only. [Reported by Robert Morse][133X
  
  [30X    [33X[0;6YWhen  prescribing  a  subgroup to be included, the low index algorithm
        for   fp  groups  sometimes  returned  subgroups  which  are  in  fact
        conjugate. (No subgroups are missing.) [Reported by Ignaz Soroko][133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YThe  command  line  option  [10X-x[110X  allowed arguments > 256 which can then
        result  in  internal  buffers  overflowing.  Now bigger numbers in the
        argument are equivalent to [10X-x 256[110X. [Reported by Michael Hartley][133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YTwo  special methods for the operation [2XCompositionMapping2[102X ([14XReference:
        CompositionMapping2[114X)  were  not  correct,  such  that  composing  (and
        multiplying)  certain  group  homomorphisms did not work. [Reported by
        Peter Mayr][133X
  
  [30X    [33X[0;6YIn    the    definition    of    [2XFrobeniusCharacterValue[102X   ([14XReference:
        FrobeniusCharacterValue[114X),  it  had  been  stated  erroneously that the
        value  must  lie  in  the  field of [22Xp^n[122X-th roots of unity; the correct
        condition  is that the value must lie in the field of [22X(p^n-1)[122X-th roots
        of unity. [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6YThe  function [2XDirectProduct[102X ([14XReference: DirectProduct[114X) failed when one
        of the factors was known to be infinite.[133X
  
  [30X    [33X[0;6YFor  a  linear  action  homomorphism [10XPreImageElm[110X was very slow because
        there was no good method to check for injectivity, which is needed for
        nearly  all  good methods for [10XPreImageElm[110X. This change adds such a new
        method for [10XIsInjective[110X. [Reported by Akos Seress][133X
  
  [30X    [33X[0;6YRare errors in the complement routine for permutation groups.[133X
  
  [30X    [33X[0;6YBlocks  code  now  uses  jellyfish-style  random elements to avoid bad
        Schreier trees.[133X
  
  [30X    [33X[0;6YA method for [2XIsPolycyclicGroup[102X ([14XReference: IsPolycyclicGroup[114X) has been
        added. Such a method was missing so far.[133X
  
  [30X    [33X[0;6YCorrected  [2XEpimorphismSchurCover[102X ([14XReference: EpimorphismSchurCover[114X) to
        handle  the  trivial  group  correctly.  Added new methods that follow
        immediately  from  computing the Schur Cover of a group. The attribute
        [2XEpicentre[102X       ([14XReference:       Epicentre[114X),      the      operations
        [2XNonabelianExteriorSquare[102X   ([14XReference:  NonabelianExteriorSquare[114X)  and
        [2XEpimorphismNonabelianExteriorSquare[102X                        ([14XReference:
        EpimorphismNonabelianExteriorSquare[114X), and the property [2XIsCentralFactor[102X
        ([14XReference:   IsCentralFactor[114X)   are   added   to   the  library  with
        documentation and references.[133X
  
  [30X    [33X[0;6YDisplay  the  correct expression in a call stack trace if an operation
        was  called  somewhere  up  due to the evaluation of a unary or binary
        operation.[133X
  
  [30X    [33X[0;6YMade  [10XStripMemory[110X  an  operation  rather than a global function. Added
        [10XForgetMemory[110X operation.[133X
  
  [30X    [33X[0;6YAdjust   things   slightly   to   make   later   conversion   to   new
        vectors/matrices easier. Nothing of this should be visible.[133X
  
  [30X    [33X[0;6YCorrected  some  details  in  the  documentation  of the [5XGAP[105X language.
        [Reported by Alexander Konovalov][133X
  
  [30X    [33X[0;6YNow  [2XPositionSorted[102X ([14XReference: PositionSorted[114X) is much faster on long
        mutable  plain  lists.  (The  former  operation  is  substituted  by a
        function  and  a  new operation [10XPositionSortedOp[110X.) [Reported by Silviu
        Radu][133X
  
  [30X    [33X[0;6YNow  it  is possible to switch repeated warnings off when working with
        iterative polynomial rings.[133X
  
  
  [1X5.8 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 9 (November 2006)[133X[101X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YThe  methods  of [2XReadByte[102X ([14XReference: ReadByte[114X) for reading from files
        or  terminals  returned  wrong  results  for  characters  in the range
        [10X[128..255][110X. [Reported by Yevgen Muntyan][133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YA  method for the operation [2XPseudoRandom[102X ([14XReference: PseudoRandom[114X) did
        not succeed.[133X
  
  [30X    [33X[0;6YA fix for [10XOrbits[110X with a set of points as a seed.[133X
  
  [30X    [33X[0;6YAdded  a  generic  method  such  that [2XPositions[102X ([14XReference: Positions[114X)
        works with all types of lists.[133X
  
  [30X    [33X[0;6YFixed   a  problem  in  choosing  the  prime  in  the  Dixon-Schneider
        algorithm. [Reported by Toshio Sumi][133X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6Y[10XReducedOrdinary[110X  was used in the manual, but was not documented, being
        a   synonym  for  the  documented  [10XReducedCharacters[110X.  Changed  manual
        examples to use the latter form. [Reported by Vahid Dabbaghian][133X
  
  
  [1X5.9 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 10 (October 2007)[133X[101X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6YFiles in the [11Xcnf[111X directory of the [5XGAP[105X distribution are now archived as
        binary files. Now [5XGAP[105X can be installed with UNIX or with WINDOWS style
        line breaks on any system and should work without problems.[133X
  
  [30X    [33X[0;6YSince large finite fields are available, some restrictions in the code
        for  computing  irreducible  modules  over finite fields are no longer
        necessary.  (They  had  been  introduced in order to give better error
        messages.)[133X
  
  [30X    [33X[0;6YMade PositionSublist faster in case the search string does not contain
        repetitive patterns.[133X
  
  [30X    [33X[0;6YThe function [10XMakeImmutable[110X now returns its argument.[133X
  
  [30X    [33X[0;6YDynamically  loaded  modules  now  work on Mac OS X. As a consequence,
        this allows to work with the Browse, EDIM and IO packages on Mac OS X.[133X
  
  [30X    [33X[0;6YIntroduced  [10XViewObj[110X  and [10XPrintObj[110X methods for algebraic number fields.
        Made  them  applicable  to  [10XAlgebraicExtension[110X  by adding the property
        [10XIsNumberField[110X in the infinite field case.[133X
  
  [30X    [33X[0;6YThe  function [2XCharacterTableRegular[102X ([14XReference: CharacterTableRegular[114X)
        is documented now.[133X
  
  [30X    [33X[0;6YThe function [2XScalarProduct[102X ([14XReference: ScalarProduct (for characters)[114X)
        now accepts also Brauer characters as arguments.[133X
  
  [30X    [33X[0;6YThe  function  [2XQuaternionAlgebra[102X  ([14XReference:  QuaternionAlgebra[114X)  now
        accepts  also  a  list of field elements instead of a field. Also, now
        the  comparison of return values (w.r.t. equality, containment) yields
        [10Xtrue[110X if the parameters coincide and the ground fields fit.[133X
  
  [30X    [33X[0;6YThe  function  [2XRemoveCharacters[102X  ([14XReference:  RemoveCharacters[114X) is now
        documented.[133X
  
  [30X    [33X[0;6YLists  in [5XGAP[105X sometimes occupy memory for possible additional entries.
        Now plain lists and strings read by [5XGAP[105X and the lists returned by [2XList[102X
        ([14XReference:  Lists[114X)  only occupy the memory they really need. For more
        details   see   the  documentation  of  the  new  function  [2XEmptyPlist[102X
        ([14XReference: EmptyPlist[114X).[133X
  
  [30X    [33X[0;6YThere  are  some  new  Conway  polynomials  in  characteristic 2 and 3
        provided by Kate Minola.[133X
  
  [30X    [33X[0;6YA new operation [10XMemoryUsage[110X determines the memory usage in bytes of an
        object and all its subobjects. It does not consider families and types
        but handles arbitrary self-referential structures of objects.[133X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6YWhen  forming  the  semidirect product of a matrix group with a vector
        space  over a non-prime field the embedding of the vector space gave a
        wrong result. [Reported by anvita21][133X
  
  [30X    [33X[0;6YDefaultRing  failed  for  constant  polynomials  over nonprime fields.
        [Reported by Stefan Kohl][133X
  
  [30X    [33X[0;6YThe method in ffeconway.gi that gets coefficients WRT to the canonical
        basis  of  the  field  from  the representation is only correct if the
        basis  is  over  the prime field. Added a TryNextMethod if this is not
        the case. [Reported by Alla Detinko][133X
  
  [30X    [33X[0;6YCreating  a  large  (>[22X2^16[122X)  field  over  a  non-prime  subfield  went
        completely wrong. [Reported by Jack Schmidt, from Alla Detinko][133X
  
  [30X    [33X[0;6YA method for Coefficients for Conway polynomial FFEs didn't check that
        the  basis  provided  was  the  canonical  basis  of  the RIGHT field.
        [Reported by Bettina Eick][133X
  
  [30X    [33X[0;6YAn  elementary  abelian series was calculated wrongly. [Reported by N.
        Sieben][133X
  
  [30X    [33X[0;6YOrbits on sets of transformations failed.[133X
  
  [30X    [33X[0;6YWrong  methods  for [2XGeneratorsOfRing[102X ([14XReference: GeneratorsOfRing[114X) and
        [2XGeneratorsOfRingWithOne[102X ([14XReference: GeneratorsOfRingWithOne[114X) have been
        removed.  These  methods  were  based  on  the assumption that one can
        obtain  a set of ring generators by taking the union of a known set of
        field  generators,  the  set of the inverses of these field generators
        and {1}.[133X
  
  [30X    [33X[0;6YThe name of a group of order 117600 and degree 50 was incorrect in the
        [2XPrimitive Permutation Groups[102X ([14XReference: Primitive Permutation Groups[114X)
        Primitive  Permutation  Groups  library.  In  particular,  a group was
        wrongly labelled as PGL(2, 49).[133X
  
  [30X    [33X[0;6YThere  was  a  possible error in [10XSubgroupsSolvableGroup[110X when computing
        subgroups within a subgroup.[133X
  
  [30X    [33X[0;6YAn error in 2-Cohomology computation for pc groups was fixed.[133X
  
  [30X    [33X[0;6Y[10XIsConjugate[110X used normality in a wrong supergroup[133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6Y[5XGAP[105X  crashed when the [10XPATH[110X environment variable was not set. [Reported
        by Robert F. Morse][133X
  
  [30X    [33X[0;6Y[5XGAP[105X  could  crash  when  started  with  option [10X-x 1[110X. Now the number of
        columns is initialized with at least 2. [Reported by Robert F. Morse][133X
  
  [30X    [33X[0;6YAfter  loading a saved workspace [5XGAP[105X crashed when one tried to slice a
        compressed  vector  over a field with 2 < q <= 256 elements, which had
        already   existed   in  the  saved  workspace.  [Reported  by  Laurent
        Bartholdi][133X
  
  [30X    [33X[0;6Y[10XFFECONWAY.WriteOverSmallestCommonField[110X  tripped  up  when  the  common
        field is smaller than the field over which some of the vector elements
        are written, because it did a test based on the degree of the element,
        not the field it is written over. [Reported by Thomas Breuer][133X
  
  [30X    [33X[0;6YFixed  the  following  error:  When  an  FFE  in the Conway polynomial
        representation  actually  lied  in  a  field  that  is  handled in the
        internal  representation  (eg  [22XGF(3)[122X) and you tried to write it over a
        bigger  field  that  is  ALSO handled internally (eg [22XGF(9)[122X) you got an
        element  written  over  the larger field, but in the Conway polynomial
        representation, which is forbidden. [Reported by Jack Schmidt][133X
  
  [30X    [33X[0;6YAttempting  to compress a vector containing elements of a small finite
        field  represented  as  elements of a bigger (external) field caused a
        segfault. [Reported by Edmund Robertson][133X
  
  [30X    [33X[0;6Y[5XGAP[105X  crashed  when  [10XBlistList[110X  was  called  with  a  range  and a list
        containing  large  integers  or  non-integers.  [Reported  by  Laurent
        Bartholdi][133X
  
  [30X    [33X[0;6Y[5XGAP[105X  no  longer  crashes  when  [10XOnTuples[110X  is  called  with a list that
        contains holes. [Reported by Thomas Breuer][133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6Y[10XSocle[110X for the trivial group could produce an error message.[133X
  
  [30X    [33X[0;6Y[2XDirectoryContents[102X ([14XReference: DirectoryContents[114X) ran into an error for
        immutable  strings  without  trailing  slash as argument. [Reported by
        Thomas Breuer][133X
  
  [30X    [33X[0;6YThe  functions [2XIsInjective[102X ([14XReference: IsInjective[114X) and [2XIsSingleValued[102X
        ([14XReference:  IsSingleValued[114X)  did not work for general linear mappings
        with trivial (pre)image. [Reported by Alper Odabas][133X
  
  [30X    [33X[0;6YCreating an enumerator for a prime field with more than 65536 elements
        ran into an infinite recursion. [Reported by Akos Seress][133X
  
  [30X    [33X[0;6YThe  performance  of  [10XList[110X,  [10XFiltered[110X,  [10XNumber[110X,  [10XForAll[110X  and [10XForAny[110X if
        applied  to  non-internally  represented  lists was improved. Also the
        performance of iterators for lists was slightly improved.[133X
  
  [30X    [33X[0;6YFinite  field  elements  now know that they can be sorted easily which
        improves performance in certain lookups.[133X
  
  [30X    [33X[0;6YA  method  for [2XIsSubset[102X ([14XReference: IsSubset[114X) was missing for the case
        that  exactly  one  argument  is  an  inhomogeneous list. [Reported by
        Laurent Bartholdi][133X
  
  [30X    [33X[0;6YLong   integers   in   expressions   are  now  printed  (was  not  yet
        implemented). [Reported by Thomas Breuer][133X
  
  [30X    [33X[0;6YFixed kernel function for printing records.[133X
  
  [30X    [33X[0;6YNew C library interfaces (e.g., to ncurses in the [5XBrowse[105X package) need
        some more memory to be allocated with [10Xmalloc[110X. The default value of [5XGAP[105X
        [10X-a[110X option is now [10X2m>[110X.[133X
  
  [30X    [33X[0;6YAvoid warnings about pointer types by newer gcc compilers.[133X
  
  [30X    [33X[0;6Y[10XIsBound(l[pos])[110X  was  failing  for a large integer [3Xpos[103X only when coded
        (e.g. in a loop or function body).[133X
  
  [30X    [33X[0;6Y[10XZmodpZObj[110X  is  now  a synonym for [10XZmodnZObj[110X such that from now on such
        objects print in a way that can be read back into [5XGAP[105X.[133X
  
  [30X    [33X[0;6YThe outdated note that binary streams are not yet implemented has been
        removed.[133X
  
  
  [1X5.10 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 11 (December 2008)[133X[101X
  
  [33X[0;0YFixed bugs which could produce wrong results:[133X
  
  [30X    [33X[0;6Y[2XMemoryUsage[102X  ([14XReference:  MemoryUsage[114X)  on  objects with no subobjects
        left  them  in  the  cache  and thus reported 0 in subsequent calls to
        MemoryUsage for the same object. [Reported by Stefan Kohl][133X
  
  [30X    [33X[0;6Y[2XIrr[102X  ([14XReference:  Irr[114X) might be missing characters. [Reported by Angel
        del Rio][133X
  
  [30X    [33X[0;6YUp    to    now,    it    was    allowed    to   call   the   function
        [2XFullMatrixAlgebraCentralizer[102X ([14XReference: FullMatrixAlgebraCentralizer[114X)
        with  a  field  and  a  list  of matrices such that the entries of the
        matrices  were  not  contained  in  the  field; in this situation, the
        result  did  not  fit  to  the  documentation.  Now the entries of the
        matrices  are  required  to  lie in the field, if not then an error is
        signaled.[133X
  
  [30X    [33X[0;6YFor  those  finite  fields  that are regarded as field extensions over
        non-prime   fields   (one  can  construct  such  fields  with  [2XAsField[102X
        ([14XReference:  AsField[114X)),  the  function  [2XDefiningPolynomial[102X ([14XReference:
        DefiningPolynomial[114X)  erroneously  returned  a  polynomial  w.r.t.  the
        extension of the prime field. [Reported by Stefan Kohl][133X
  
  [30X    [33X[0;6YSince  the  release  of  [5XGAP[105X 4.4.10, the return values of the function
        [2XQuaternionAlgebra[102X  ([14XReference:  QuaternionAlgebra[114X) were not consistent
        w.r.t.      the      attribute     [2XGeneratorsOfAlgebra[102X     ([14XReference:
        GeneratorsOfAlgebra[114X);  the  returned  list  could  have length four or
        five.  Now  always  the  list  of  elements  of the canonical basis is
        returned.[133X
  
  [30X    [33X[0;6Y[2XMonomialGrevlexOrdering[102X      ([14XReference:      MonomialGrevlexOrdering[114X)
        calculated a wrong ordering in certain cases. [Reported by Paul Smith][133X
  
  [30X    [33X[0;6YThe  ([5XGAP[105X  kernel)  method  for the operation [2XIntersectSet[102X ([14XReference:
        IntersectSet[114X)  for  ranges  had  two  bugs, which could yield a result
        range  with either too few or too many elements. As a consequence, for
        example  the [2XIntersection[102X ([14XReference: Intersection[114X) results for ranges
        could be wrong. [Reported by Matthew Fayers][133X
  
  [30X    [33X[0;6YFixed  a  bug  in  the short-form display of elements of larger finite
        fields,  a bug in some cross-field conversions and some inefficiencies
        and a missing method in the [2XLogFFE[102X ([14XReference: LogFFE[114X) code. [Reported
        by Jia Huang][133X
  
  [30X    [33X[0;6YIn    rare   cases   [2XSmithNormalFormIntegerMatTransforms[102X   ([14XReference:
        SmithNormalFormIntegerMatTransforms[114X) returned a wrong normal form (the
        version without transforming matrices did not have this problem). This
        is fixed. [Reported by Alexander Hulpke][133X
  
  [30X    [33X[0;6YThe   variant   of   the   function   [2XStraightLineProgram[102X  ([14XReference:
        StraightLineProgram   (for   a  list  of  lines  (and  the  number  of
        generators))[114X) that takes a string as its first argument returned wrong
        results if the last character of this string was a closing bracket.[133X
  
  [30X    [33X[0;6YThe  code  for  central series in a permutation group used too tight a
        bound  and  thus  falsely  return  a  nilpotent  permutation  group as
        non-nilpotent.[133X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YUnder  certain  circumstances  the  kernel code for position in blists
        would  access  a  memory  location just after the end of the blist. If
        this  location  was  not  accessible,  a  crash could result. This was
        corrected and the code was cleaned up. [Reported by Alexander Hulpke][133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YThe    function    [2XIsomorphismTypeInfoFiniteSimpleGroup[102X    ([14XReference:
        IsomorphismTypeInfoFiniteSimpleGroup[114X)  can  be  called with a positive
        integer  instead  of  a  group, and then returns information about the
        simple   group(s)   of   this   order.   (This  feature  is  currently
        undocumented.)  For  the  argument 1, however, it ran into an infinite
        loop.[133X
  
  [30X    [33X[0;6YA  lookup  in  an  empty  dictionary entered a break loop. Now returns
        [10Xfail[110X. [Reported by Laurent Bartholdi][133X
  
  [30X    [33X[0;6YThe  c++ keyword [10Xand[110X can no longer be used as a macro parameter in the
        kernel. [Reported by Paul Smith][133X
  
  [30X    [33X[0;6YThe    operation    [2XKernelOfMultiplicativeGeneralMapping[102X   ([14XReference:
        KernelOfMultiplicativeGeneralMapping[114X)  has  methods designed to handle
        maps  between  permutation  groups in a two-step approach, but did not
        reliably  trigger the second step. This has now been fixed, preventing
        a  slow infinite loop repeating the first step. This was normally only
        seen as part of a larger calculation.[133X
  
  [30X    [33X[0;6YThere  were  two  methods  for the operation [2XIntersection2[102X ([14XReference:
        Intersection2[114X)  which  have  implicitly  assumed  that finiteness of a
        collection  can  always  be  decided.  Now,  these  methods  check for
        [2XIsFinite[102X   ([14XReference:   IsFinite[114X)   and   [2XCanComputeSize[102X  ([14XReference:
        CanComputeSize[114X) prior to calling [2XIsFinite[102X ([14XReference: IsFinite[114X).[133X
  
  [30X    [33X[0;6YMade  error  message  in  case  of  corrupted  help  book  information
        (manual.six file) shorter and more informative. [Reported by Alexander
        Hulpke][133X
  
  [30X    [33X[0;6Y[5XGAP[105X  cannot  call  methods  with  more  than  six  arguments.  Now the
        functions  [2XNewOperation[102X  ([14XReference:  NewOperation[114X),  [2XDeclareOperation[102X
        ([14XReference:    DeclareOperation[114X),    and   [2XInstallMethod[102X   ([14XReference:
        InstallMethod[114X) signal an error if one attempts to declare an operation
        or to install a method with more than six arguments.[133X
  
  [30X    [33X[0;6YUp  to  now, [2XIsOne[102X ([14XReference: IsOne[114X) had a special method for general
        mappings,  which  was much worse than the generic method; this special
        method has now been removed.[133X
  
  [30X    [33X[0;6YWhen  printing  elements  of an algebraic extension parentheses around
        coefficients were missing. [Reported by Maxim Hendriks][133X
  
  [33X[0;0YNew or improved functionality:[133X
  
  [30X    [33X[0;6YMake  dynamic  loading of modules possible on CYGWIN using a DLL based
        approach. Also move to using autoconf version 2.61.[133X
  
  [30X    [33X[0;6YOne  can  now  call  [2XBasis[102X  ([14XReference:  Basis[114X),  [2XIterator[102X ([14XReference:
        Iterator[114X)    etc.    with   the   return   value   of   the   function
        [2XAlgebraicExtension[102X ([14XReference: AlgebraicExtension[114X).[133X
  
  [30X    [33X[0;6YThe         function        [2XFrobeniusCharacterValue[102X        ([14XReference:
        FrobeniusCharacterValue[114X)  returned  [10Xfail[110X  for  results  that require a
        finite  field  with more than 65536 elements. Meanwhile [5XGAP[105X can handle
        larger  finite  fields,  so this restriction was removed. (It is still
        possible        that        [2XFrobeniusCharacterValue[102X        ([14XReference:
        FrobeniusCharacterValue[114X) returns [10Xfail[110X.)[133X
  
  [30X    [33X[0;6YMethods  for  testing  membership in general linear groups and special
        linear groups over the integers have been added.[133X
  
  [30X    [33X[0;6YMethods  for  [2XString[102X  ([14XReference:  String[114X) and [10XViewString[110X for full row
        modules  have  been  added.  Further, a default method for [2XIsRowModule[102X
        ([14XReference:  IsRowModule[114X)  has  been  added,  which  returns [10Xfalse[110X for
        objects which are not free left modules.[133X
  
  [30X    [33X[0;6YA [10XViewString[110X method for objects with name has been added.[133X
  
  [30X    [33X[0;6YThe  method  for  [2XView[102X ([14XReference: View[114X) for polynomial rings has been
        improved,  and  methods  for [2XString[102X ([14XReference: String[114X) and [10XViewString[110X
        for polynomial rings have been added.[133X
  
  [30X    [33X[0;6Y[2XBinomial[102X ([14XReference: Binomial[114X) now works with huge [10Xn[110X.[133X
  
  [30X    [33X[0;6YThe      function     [2XInducedClassFunctionsByFusionMap[102X     ([14XReference:
        InducedClassFunctionsByFusionMap[114X) is now documented.[133X
  
  [30X    [33X[0;6YThe  return  values  of  the  function  [2XQuaternionAlgebra[102X  ([14XReference:
        QuaternionAlgebra[114X) now store that they are division rings (if optional
        parameters are given then of course ths depends on these parameters).[133X
  
  
  [1X5.11 [33X[0;0Y[5XGAP[105X[101X[1X 4.4 Update 12 (December 2008)[133X[101X
  
  [33X[0;0YFixed bugs which could lead to crashes:[133X
  
  [30X    [33X[0;6YA  bug whereby leaving an incomplete statement on a line (for instance
        typing  while  and then return) when prompt colouring was in use could
        lead to [5XGAP[105X crashing.[133X
  
  [33X[0;0YOther fixed bugs:[133X
  
  [30X    [33X[0;6YA  bug which made the command-line editor unusable in a 64-bit version
        of [5XGAP[105X on Mac OS X.[133X
  
