File gap-xmod.changes of Package gap-xmod
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Mon Apr 28 08:08:21 UTC 2025 - Jan Engelhardt <jengelh@inai.de>
- Update to release 2.93
* Added sub-crossed square and sub-cat2-group operations
* Simplified the construction of crossed pairings so that
files map2arg.{gd,gi} can be removed
* Implemented (Inner)ActorCat1Group
* Added AutomorphismPermGroup method for cat1-groups
* Renamed PermAutomorphismAsXModMorphism as
PermAutomorphismAs2dGroupMorphism and added cat1-group method
* Added WhiteheadRegularGroup and WhiteheadGroupIsomorphism
* Removed the unused CompositeDerivation (= WhiteheadProduct)
* Removed the unused (List)InverseDerivations
* Renamed WhiteheadGroupGeneratingDerivations as ...UpMappings
* Added WhiteheadGroupInverseIsomorphism
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Tue Jan 23 16:19:42 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
- Update to release 2.92
* Added methods for WhiteheadXMod etc. for xmods which are not
permanent xmods
* Now using the NC version of PreImagesRepresentative
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Sun Jun 25 10:05:29 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
- Update to release 2.91
* added a chapter on double groupoids with operations
EnhancedBasicDoubleGroupoid, DoubleGroupooidWithZeroBoundary
* added PreXModWithTrivialRange
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Sat Feb 11 11:05:02 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
- Update to release 2.89
* added RegularActionHomomorphism(Object/2DimensionalGroup)
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Sat Nov 19 01:29:13 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
- Update to release 2.88
* Lots of new and renamed functions
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Mon Dec 25 16:44:31 UTC 2017 - jengelh@inai.de
- Update to new upstream release 2.6.4
* fixed tests to work with both 4r8 and dev in 3 options
* removed attribute AutoGroup (=Range(XModAction)) for xmods
* added operations SinglePiecePreXModWithObjects(NC)
* added Root2dGroup for prexmods with objects
* ImageElmXModAction now works for xmods of groupoids
* added operation ImageElmXModAction
* renamed test files and made them independent
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Fri Sep 8 20:19:50 UTC 2017 - jengelh@inai.de
- Update to new upstream release 2.62
* Replaced PreXModIsomorphismByIsomorphisms by the more general
IsomorphismByIsomorphisms; then functions such as
IsomorphismPerm2DimensionalGroup rewritten to use it.
* Added IsomorphismByIsomorphisms for pre1-cat-groups
* New functions added for crossed square <-> cat2-group:
ConjugationActionForCrossedSquare;
ElementsRelationsForSemidirectProduct
* Added CoproductInfo for coproducts FactorXMod now
FactorPreXMod (ditto NaturalMorphisms)
* Added Is2dGroupMorphismData and modified construction
functions Method for IsNormal now applies to precrossed
modules added PeifferSub2dGroup
* Added operation DiagonalCat1 and example S3xS3 => S3
* Added operation CoproductXMod and files `coprod.g`,
`coprod.tst`
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Sat Apr 29 23:40:33 UTC 2017 - jengelh@inai.de
- Update to new upstream release 2.59
* added property IsEndomorphismPreCat1
* modified IsomorphismPerm2dGroup for PreCat1 objects
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Mon Nov 21 21:10:02 UTC 2016 - jengelh@inai.de
- Update to new upstream release 2.58
* added files hap.gd, hap.gi
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Wed Jun 8 20:54:47 UTC 2016 - jengelh@inai.de
- Update to new upstream release 2.56
* remove functions from util.g(d/i) now in Utils; require Utils
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Sat Mar 12 20:07:05 UTC 2016 - jengelh@inai.de
- Update to new upstream release 2.51
* renamed Rank and MiddleLength and now for p-groups only
* XPair -> XPairing, etc.
* IsomorphismPermPre(XMod/Cat1) -> IsomorphismPerm2dGroup, etc.
* IsStemGroup & IsStemXMod -> IsStemDomain etc.
* RestrictionMappingGroups -> GeneralRestgrictedMapping
* CentralQuotient now a crossed module or a crossed square
* added LeftRightMorphism and UpDownMorphism for crossed squares
* methods for InnerMorphism, ActorXMod, CentreXMod, etc.
now specified only for permutation crossed modules
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Tue Dec 8 16:57:19 UTC 2015 - jengelh@inai.de
- Update to new upstream release 2.44
* added Centralizer and Normalizer methods for crossed modules
* added ExternalSetXMod
* added operation Displacement
* added AllStemGroupFamilies and Set various Names
* added NaturalHomomorphismByNormalSubXMod
* added CrossActionSubgroup
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Sun Feb 22 11:35:17 UTC 2015 - jengelh@inai.de
- Update to new upstream release 2.31
* Metadata update (homepage URL) only
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Fri Feb 7 16:54:11 UTC 2014 - jengelh@inai.de
- Update to new upstream release 2.26
* minor mod to WhiteheadTransMonoid to fix gp2up.tst output
* fixed errors in cat1data.g reported by Van Luyen Le.
* fixed error in Cat1MorphismByXModMorphism.
* completed work on groups of order [64..70] in cat1data.g
* added operation CollectPartsAlreadyDone.
* added operation PreCat1IsomorphismByIsomorphisms.
* fixed bug in PermCat1Select sent by Van Luyen Le
* put groups of order 64 back into cat1data.g
* rewrite of testall.g following Alex K's wedderga example
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Fri May 10 13:47:02 UTC 2013 - jengelh@inai.de
- Split xmod (version 2.22) off the gap RPM package
