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Theorem subgroup.index_eq_card

Modification history

2021-12-04 01:52
src/group_theory/index.lean
feat(*): `A ⧸ B` notation for quotients in algebra (#10501) …
Modified subgroup.index_eq_cardView on Github →
2021-09-08 06:17
src/group_theory/index.lean
feat(group_theory/index): define the index of a subgroup (#8971) …
Added subgroup.index_eq_cardView on Github →