Theorem groupCohomology.isTwoCoboundary_of_mem_twoCoboundaries

Modification history

2025-07-03 00:27

Mathlib/RepresentationTheory/Homological/GroupCohomology/LowDegree.lean

refactor: denote low degree group cohomology API indices with subscripts (#26546) …

Deleted groupCohomology.isTwoCoboundary_of_mem_twoCoboundaries View on Github →

2025-02-19 09:43

Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean

refactor(RepresentationTheory/GroupCohomology/LowDegree): make `nCoboundaries` a submodule of the n-cochains rather than the `nCocycles` for `n = 0, 1, 2` (#22047)

Added groupCohomology.isTwoCoboundary_of_mem_twoCoboundaries View on Github →