Mathlib v3 is deprecated. Go to Mathlib v4

Theorem subgroup.inf_relindex_eq_relindex_sup

Modification history

2022-11-30 13:42
src/group_theory/index.lean
refactor(subgroup/basic): use `subgroup.subgroup_of` as the normal form (#17744) …
Deleted subgroup.inf_relindex_eq_relindex_supView on Github →
2021-10-25 06:51
src/group_theory/index.lean
feat(group_theory/index): Second isomorphism theorem in terms of `relindex` (#9915) …
Added subgroup.inf_relindex_eq_relindex_supView on Github →