Mathlib v3 is deprecated. Go to Mathlib v4

Theorem set.exists_eq_singleton_iff_nonempty_subsingleton

Modification history

2022-02-21 11:38
src/data/set/basic.lean
chore(data/set/basic): add a few lemmas and a `@[simp]` attribute (#12176) …
Added set.exists_eq_singleton_iff_nonempty_subsingletonView on Github →