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Mjrodgers ow g modules #4108

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Mjrodgers ow g modules #4108

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@fieker fieker commented Sep 18, 2024

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@lgoettgens lgoettgens added the experimental Only changes experimental parts of the code label Sep 26, 2024
ThomasBreuer and others added 8 commits October 9, 2024 10:27
create an Oscar collector from a GAP collector
Co-authored-by: Lars Göttgens <[email protected]>
the following should/ will work:

  C = trivial_gmodule(pc_group(symmetric_group(4)), abelian_group([2,3]))
  q = cohomology_group(C, 2);
  h = q[2](q[1][1])
  E = extension(h)

  m1 = isomorphism(FPGroup, E)
  m2 = isomorphism(PcGroup, E)

  is_isomorphic(codomain(m1), codomain(m2))

However, m2 will not work as a map, there is code missing to legally
convert a syllable back into a PcGroup

Or a shiftgens for PcGroups

The syllables function for Pc is possibly dodgy
create an Oscar collector from a GAP collector
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4 participants