Def GroupExtension.Equiv.Simps.symm_apply

Modification history

2025-02-07 17:49
Mathlib/GroupTheory/GroupExtension/Defs.lean
chore(GroupExtension/Basic): add lemmas about extensions by (non-abelian) groups (#20998) …
Added GroupExtension.Equiv.Simps.symm_applyView on Github →