Theorem Set.ncard_sdiff_singleton_of_mem

Modification history

2026-10-02 21:33
Mathlib/Data/Set/Card.lean
feat(Data/Set/Card): cardinality of complement and difference (#43424) …
Modified Set.ncard_sdiff_singleton_of_memView on Github →
2026-06-09 08:51
Mathlib/Data/Set/Card.lean
chore: rename `diff` to `sdiff` (#40184) …
Added Set.ncard_sdiff_singleton_of_memView on Github →