forked from pool/gap-xmod
160 lines
6.4 KiB
Plaintext
160 lines
6.4 KiB
Plaintext
-------------------------------------------------------------------
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Thu Jul 10 13:40:40 UTC 2025 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.95
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* Added `PreXModWithObjectsByBoundaryAndAction`
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* Make the new groupoids 1.77 a prerequisite and revise material
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on double groupoids to agree with the changes in gap-groupoids.
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-------------------------------------------------------------------
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Tue Jul 8 08:02:07 UTC 2025 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.94
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* Added a temporary fix to work with gap-groupoids 1.77
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-------------------------------------------------------------------
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Mon Apr 28 08:08:21 UTC 2025 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.93
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* Added sub-crossed square and sub-cat2-group operations
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* Simplified the construction of crossed pairings so that
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files map2arg.{gd,gi} can be removed
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* Implemented (Inner)ActorCat1Group
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* Added AutomorphismPermGroup method for cat1-groups
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* Renamed PermAutomorphismAsXModMorphism as
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PermAutomorphismAs2dGroupMorphism and added cat1-group method
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* Added WhiteheadRegularGroup and WhiteheadGroupIsomorphism
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* Removed the unused CompositeDerivation (= WhiteheadProduct)
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* Removed the unused (List)InverseDerivations
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* Renamed WhiteheadGroupGeneratingDerivations as ...UpMappings
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* Added WhiteheadGroupInverseIsomorphism
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-------------------------------------------------------------------
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Tue Jan 23 16:19:42 UTC 2024 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.92
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* Added methods for WhiteheadXMod etc. for xmods which are not
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permanent xmods
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* Now using the NC version of PreImagesRepresentative
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-------------------------------------------------------------------
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Sun Jun 25 10:05:29 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.91
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* added a chapter on double groupoids with operations
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EnhancedBasicDoubleGroupoid, DoubleGroupooidWithZeroBoundary
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* added PreXModWithTrivialRange
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-------------------------------------------------------------------
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Sat Feb 11 11:05:02 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.89
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* added RegularActionHomomorphism(Object/2DimensionalGroup)
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-------------------------------------------------------------------
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Sat Nov 19 01:29:13 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
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- Update to release 2.88
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* Lots of new and renamed functions
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-------------------------------------------------------------------
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Mon Dec 25 16:44:31 UTC 2017 - jengelh@inai.de
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- Update to new upstream release 2.6.4
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* fixed tests to work with both 4r8 and dev in 3 options
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* removed attribute AutoGroup (=Range(XModAction)) for xmods
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* added operations SinglePiecePreXModWithObjects(NC)
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* added Root2dGroup for prexmods with objects
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* ImageElmXModAction now works for xmods of groupoids
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* added operation ImageElmXModAction
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* renamed test files and made them independent
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-------------------------------------------------------------------
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Fri Sep 8 20:19:50 UTC 2017 - jengelh@inai.de
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- Update to new upstream release 2.62
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* Replaced PreXModIsomorphismByIsomorphisms by the more general
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IsomorphismByIsomorphisms; then functions such as
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IsomorphismPerm2DimensionalGroup rewritten to use it.
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* Added IsomorphismByIsomorphisms for pre1-cat-groups
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* New functions added for crossed square <-> cat2-group:
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ConjugationActionForCrossedSquare;
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ElementsRelationsForSemidirectProduct
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* Added CoproductInfo for coproducts FactorXMod now
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FactorPreXMod (ditto NaturalMorphisms)
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* Added Is2dGroupMorphismData and modified construction
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functions Method for IsNormal now applies to precrossed
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modules added PeifferSub2dGroup
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* Added operation DiagonalCat1 and example S3xS3 => S3
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* Added operation CoproductXMod and files `coprod.g`,
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`coprod.tst`
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-------------------------------------------------------------------
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Sat Apr 29 23:40:33 UTC 2017 - jengelh@inai.de
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- Update to new upstream release 2.59
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* added property IsEndomorphismPreCat1
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* modified IsomorphismPerm2dGroup for PreCat1 objects
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-------------------------------------------------------------------
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Mon Nov 21 21:10:02 UTC 2016 - jengelh@inai.de
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- Update to new upstream release 2.58
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* added files hap.gd, hap.gi
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-------------------------------------------------------------------
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Wed Jun 8 20:54:47 UTC 2016 - jengelh@inai.de
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- Update to new upstream release 2.56
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* remove functions from util.g(d/i) now in Utils; require Utils
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-------------------------------------------------------------------
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Sat Mar 12 20:07:05 UTC 2016 - jengelh@inai.de
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- Update to new upstream release 2.51
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* renamed Rank and MiddleLength and now for p-groups only
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* XPair -> XPairing, etc.
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* IsomorphismPermPre(XMod/Cat1) -> IsomorphismPerm2dGroup, etc.
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* IsStemGroup & IsStemXMod -> IsStemDomain etc.
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* RestrictionMappingGroups -> GeneralRestgrictedMapping
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* CentralQuotient now a crossed module or a crossed square
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* added LeftRightMorphism and UpDownMorphism for crossed squares
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* methods for InnerMorphism, ActorXMod, CentreXMod, etc.
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now specified only for permutation crossed modules
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-------------------------------------------------------------------
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Tue Dec 8 16:57:19 UTC 2015 - jengelh@inai.de
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- Update to new upstream release 2.44
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* added Centralizer and Normalizer methods for crossed modules
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* added ExternalSetXMod
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* added operation Displacement
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* added AllStemGroupFamilies and Set various Names
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* added NaturalHomomorphismByNormalSubXMod
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* added CrossActionSubgroup
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-------------------------------------------------------------------
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Sun Feb 22 11:35:17 UTC 2015 - jengelh@inai.de
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- Update to new upstream release 2.31
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* Metadata update (homepage URL) only
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-------------------------------------------------------------------
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Fri Feb 7 16:54:11 UTC 2014 - jengelh@inai.de
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- Update to new upstream release 2.26
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* minor mod to WhiteheadTransMonoid to fix gp2up.tst output
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* fixed errors in cat1data.g reported by Van Luyen Le.
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* fixed error in Cat1MorphismByXModMorphism.
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* completed work on groups of order [64..70] in cat1data.g
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* added operation CollectPartsAlreadyDone.
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* added operation PreCat1IsomorphismByIsomorphisms.
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* fixed bug in PermCat1Select sent by Van Luyen Le
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* put groups of order 64 back into cat1data.g
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* rewrite of testall.g following Alex K's wedderga example
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-------------------------------------------------------------------
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Fri May 10 13:47:02 UTC 2013 - jengelh@inai.de
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- Split xmod (version 2.22) off the gap RPM package
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