Theorem Set.ssubset_univ_iff_nonempty_compl

Modification history

2026-03-17 22:36
Mathlib/Data/Set/Basic.lean
feat(SetTheory/Ordinal/Basic): the `#s`-th element of `α` is an upper-bound for the set's mex (#36539) …
Added Set.ssubset_univ_iff_nonempty_complView on Github →