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Theorem set.subsingleton.eq_singleton_of_mem

Modification history

2022-08-16 13:24
src/data/set/basic.lean
feat(data/set/basic): Add natural missing lemmas to `set.subsingleton` and slightly refactor (#15886) …
Modified set.subsingleton.eq_singleton_of_memView on Github →
2020-02-02 10:49
src/data/set/basic.lean
feat(data/set/basic): define `set.subsingleton` (#1939) …
Added set.subsingleton.eq_singleton_of_memView on Github →