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Theorem set.subsingleton_singleton

Modification history

2021-03-16 21:43
src/data/set/basic.lean
feat(topology/separation): `(closure s).subsingleton ↔ s.subsingleton` (#6707) …
Modified set.subsingleton_singletonView on Github →
2020-02-02 10:49
src/data/set/basic.lean
feat(data/set/basic): define `set.subsingleton` (#1939) …
Added set.subsingleton_singletonView on Github →