Issues

• Group inclusion tests is broken when interacting with list list matrices and compressed matrices.

  gap-system/gap#6672 · Filter by author GalaxyCo opened on Oct 2, 2026

• Membership test for groups respecting a sesquilinear form fails for matrix objects

  gap-system/gap#6671 · Filter by author GalaxyCo opened on Oct 2, 2026

• MTX.IsAbsolutelyIrreducible() sometimes fails for modules created from matrix objects.

  gap-system/gap#6670 · Filter by author GalaxyCo opened on Oct 2, 2026

• Add documentation for Meataxe functions

  gap-system/gap#6669 · Filter by author AliaBonnet opened on Oct 2, 2026

• Discussion: on the User Experience, State and Future of Matrix() and Matrix Objects in gap

  gap-system/gap#6658 · Filter by author GalaxyCo opened on Oct 1, 2026

• Document tilde operator

  topic: documentation
  gap-system/gap#6657 · Filter by author fingolfin opened on Oct 1, 2026

• In-place operations for vector and matrix objects must check their arguments

  kind: bug: wrong resultkind: bug
  gap-system/gap#6656 · Filter by author ThomasBreuer opened on Oct 1, 2026
  1

• Using the Matrix/Vector Constructor does not work as expected with Polynomial Rings

  gap-system/gap#6643 · Filter by author GalaxyCo opened on Sep 30, 2026

• IsGenericMatrixRep does not work with RankMat

  gap-system/gap#6642 · Filter by author GalaxyCo opened on Sep 30, 2026

• Should multiplying a MatrixObj with a list work? Always? Never? Current state: sometimes, at random

  gap-system/gap#6635 · Filter by author fingolfin opened on Sep 30, 2026

• Add Vector( list, MatObj ) ?

  gap-system/gap#6634 · Filter by author fingolfin opened on Sep 30, 2026

• Matrix groups can be created with different types of matrices

  kind: bug
  gap-system/gap#6632 · Filter by author GalaxyCo opened on Sep 29, 2026
  3

• Bad PackageInfo.g file makes GAP unloadable

  gap-system/gap#6629 · Filter by author mtorpey opened on Sep 29, 2026
  4

• strange elements in Elements

  gap-system/gap#6628 · Filter by author fieker opened on Sep 29, 2026
  3

• Matrix Objects can not be used with MutableBasis

  gap-system/gap#6627 · Filter by author GalaxyCo opened on Sep 29, 2026
  1

• Calling NullspaceMat with Matrix Object on Zero/Invertible Matrix behaves unexpectedly

  kind: bug: wrong resultkind: bug
  gap-system/gap#6622 · Filter by author GalaxyCo opened on Sep 28, 2026
  1

• Embeddings/projections for direct sum of algebras

  gap-system/gap#6596 · Filter by author cdwensley opened on Sep 24, 2026
  1

• Roll out "gap in the browser" more officially?

  gap-system/gap#6593 · Filter by author fingolfin opened on Sep 22, 2026
  1

• Towards GAP 4.17.0

  gap-system/gap#6578 · Filter by author fingolfin opened on Sep 17, 2026 · GAP 4.17.0
  2

• Support XDG base instead of hard-coding $HOME/.gap

  gap-system/gap#6564 · Filter by author limakzi opened on Sep 7, 2026
  2

• Doc: Fix old package name CrystGap to Cryst

  gap-system/gap#6550 · Filter by author kiryph opened on Sep 3, 2026

• There is no IsMetacyclic method

  good first issuekind: enhancement
  gap-system/gap#6548 · Filter by author limakzi opened on Sep 2, 2026
  3

  

• Untangle the command line options --nobreakloop, --alwaystrace, --quitonbreak, --nointeract, --norepl

  gap-system/gap#6519 · Filter by author fingolfin opened on Aug 22, 2026
  1

• Infinite recursion between ElementaryAbelianSeries and PcgsElementaryAbelianSeries

  gap-system/gap#6508 · Filter by author fingolfin opened on Aug 12, 2026

• global option NoPrecomputedData

  kind: enhancementtopic: documentation
  gap-system/gap#6484 · Filter by author ThomasBreuer opened on Aug 4, 2026