Theorem Set.one_lt_ncard_iff_nontrivial

Modification history

2025-12-16 07:57
Mathlib/Data/Set/Card.lean
feat(GroupTheory/SpecificGroups/Alternating/MaximalSubgroups): maximal subgroups of the alternating group (#26831) …
Added Set.one_lt_ncard_iff_nontrivialView on Github →