Theorem Subgroup.index_eq_two_iff

Modification history

2026-04-27 20:25
Mathlib/GroupTheory/Index.lean
chore: Rename Xor' to Xor (#37628) …
Modified Subgroup.index_eq_two_iffView on Github →
2023-02-14 07:17
Mathlib/GroupTheory/Index.lean
feat: port GroupTheory.Index (#2222)
Added Subgroup.index_eq_two_iffView on Github →