Theorem Subgroup.normal_subgroupOf_iff_le_normalizer_inf

Modification history

2025-03-14 18:40
Mathlib/Algebra/Group/Subgroup/Basic.lean
refactor(Algebra/Group/Subgroup/Basic): clean up normalizer lemmas (#22913) …
Added Subgroup.normal_subgroupOf_iff_le_normalizer_infView on Github →