Theorem Subgroup.relindex_map_map_of_injective

Modification history

2025-08-11 22:54
Mathlib/GroupTheory/Index.lean
feat(ZLattice/Covolume): add `covolume_div_covolume_eq_relindex` (#25730) …
Added Subgroup.relindex_map_map_of_injectiveView on Github →