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Quelle CHANGES.md
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# CHANGES to the 'XModAlg' package
## 1.27 -> 1.32 (11/04/25)
* (31/01/25) added Nizar Shammu's thesis to the list of references;
removed all operations involving direct sums of crossed modules
of algebras because the theoretical basis needs checking;
## 1.26 -> 1.27 (26/10/24)
* (21/10/24) removed references to "Type2" and "XModAlgebraConst"
tests now use local variables and are mirrored in /examples
xmod.tst now agrees with sections 4.1.7-4.1.10 in the manual
changed names of variables in tests to avoid duplications
## 1.25 -> 1.26 (09/07/24)
* (08/07/24) renamed the actions and algebras in the tests/examples as
act1, act2, ,,, act6 and added direct sum operations
AlgebraActionOnDirectSum and DirectSumAlgebraActions
* (17/05/24) added operations for a module as an algebra,
revised XModAlgebraByModule
* (26/06/24) added AlgebraActionByHomomorphism,
changed the example of XModAlgebraByBoundaryAndAction
## 1.23 -> 1.25 (17/05/24)
* (17/05/24) just 5 PRs since 1.23 came out - mostly CI changes
## 1.22 -> 1.23 (03/12/22)
* (03/12/22) changed AlgebraHomomorphismByFunction to agree with FR version
and prior to the function being moved to the main GAP library
## 1.18 -> 1.22 (29/04/22)
* (27/04/22) required version 2.87 of XMod which uses Size2d in place of
Size, and so replaced Size by Size2d for 2d-algebras
* (15/07/21) revised PreXModAlgebraOfPreCat1Algebra
* (14/07/21) revised IsPreXModAlgebra and IsXModAlgebra
renamed AlgebraAction4 as AlgebraActionByModule
* (09/07/21) added section on Multipliers and MultiplierAlgebras
* (09/06/21) renamed AlgebraAction3 as AlgebraActionBySurjection
renamed XModAlgebraByCentralExtension XModAlgebraBySurjection
revised these operations and added examples
* (25/05/21) renamed AlgebraAction1 as AlgebraActionByMultipliers
added operation SemidirectProductofAlgebras
added chapter Commutative algebras and their actions to manual
* (12/05/21) added algebra attribute AugmentationXMod
* (11/05/21) added lib/vspchom.gi as a temporary fix
## 1.17 -> 1.18 (16/11/20)
* (07/08/20) fixed problem with Cat1AlgebraOfXModAlgebra
introduced ImagesSource2DimensionalMapping
* (09/10/18) Conversion files: use "Of", not "By". Delete SDproduct.
* (23/09/18) PreCat1Obj replaced by PreCat1AlgebraByTailHeadEmbedding
* (22/09/18) split off convert.xml and convert.tst from cat1.xml and cat1.tst
## 1.16 -> 1.17 (30/08/18)
* (29/08/18) added method for ImagesSource at end of alg2map.gi
* (28/08/18) update examples to avoid travis failures
## 1.15 -> 1.16
* (29/01/18) changed package releases to https://gap-packages.github.io/xmodalg
## 1.14 -> 1.15
* (09/01/18) correction the release archive
## 1.13 -> 1.14
* (02/12/17) adjust test files to work correctly after LoadAllPackages();
* (30/11/17) now requires XMod 2.64
* (01/11/17) now requires Laguna 3.7.0
* (05/10/17) moved testall.g to testing.g and added new testall.g
* (05/10/17) converted manual.bib to bib.xml
* (05/10/17) converted README and CHANGES to MarkDown files
## 1.12 -> 1.13
* (30/09/17) created Github repository for 'XModAlg'
## initial release
* Version 1.12 was prepared for the 4.* release at November 2015.
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2026-03-28
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