Theorem Subgroup.isFiniteRelIndex_of_le

Modification history

2026-05-11 14:41
Mathlib/GroupTheory/Index.lean
feat: add more API for (rel)index and ideals (#39118) …
Deleted Subgroup.isFiniteRelIndex_of_leView on Github →
2026-03-06 23:17
Mathlib/GroupTheory/Index.lean
feat: some lemmas about finite index subgroups/submodules (#36227) …
Added Subgroup.isFiniteRelIndex_of_leView on Github →