Issues

• Bugs in homomorphism code

  gap-packages/polycyclic#214 · Filter by author stertooy opened on Oct 8, 2026
  

• Document DirectProduct and SemidirectProduct

  gap-packages/polycyclic#212 · Filter by author stertooy opened on Oct 7, 2026

• Bug in calculation of 2-cohomology group

  gap-packages/polycyclic#211 · Filter by author stertooy opened on Oct 7, 2026

• Some issues with LowIndexSubgroupClasses and LowIndexNormalSubgroups

  gap-packages/polycyclic#201 · Filter by author stertooy opened on Oct 4, 2026

• CRRecord functions cannot handle trivial module

  gap-packages/polycyclic#192 · Filter by author stertooy opened on Oct 3, 2026

• Add a function IsomorphismPcpGroupByIGS or so, which takes an IGS and computes a new pcp group isomorphic to the group generated by IGS

  enhancement
  gap-packages/polycyclic#184 · Filter by author fingolfin opened on Oct 2, 2026

• Make some code in gap/pcpgrp/tensor_nq.gi a package extension?

  gap-packages/polycyclic#164 · Filter by author stertooy opened on Oct 1, 2026

• Implement ConjugacySubgroupsBySeries

  gap-packages/polycyclic#163 · Filter by author stertooy opened on Oct 1, 2026

• AbelianIntersection gives wrong results and tries to call Depth on integers

  gap-packages/polycyclic#151 · Filter by author stertooy opened on Sep 30, 2026

• Feature request: SemidirectProduct (and DirectProduct) with polycyclic groups that aren't PcpGroups

  gap-packages/polycyclic#131 · Filter by author stertooy opened on Sep 28, 2026

• Error in fallback for KernelOfCongruenceMatrixAction

  gap-packages/polycyclic#123 · Filter by author stertooy opened on Jul 16, 2026

• Use GAP package extension feature (introduced in GAP 4.13) to break cyclic dependency with alnuth

  gap-packages/polycyclic#94 · Filter by author fingolfin opened on Dec 9, 2024

• Different behaviour in 2.16 and 2.17dev for AbelianPcpGroup if some of the given orders are 1

  gap-packages/polycyclic#92 · Filter by author ThomasBreuer opened on Nov 22, 2024
  2

• Add/improve input validation for Pcp, Ngs, Cgs, others... ?

  gap-packages/polycyclic#75 · Filter by author fingolfin opened on Aug 8, 2022

• Idea: Make (most of) the collector immutable once its been used to create a group

  enhancement
  gap-packages/polycyclic#14 · Filter by author fingolfin opened on Dec 29, 2016
  1

• assertion in SubgroupByIgs when computing a torsion subgroup

  question
  gap-packages/polycyclic#1 · Filter by author fingolfin opened on Dec 27, 2016
  2