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Theorem topological_space.countable_of_is_open_of_disjoint

Modification history

2021-11-04 17:11
src/topology/bases.lean
refactor(data/set/pairwise): Indexed sets as arguments to `set.pairwise_disjoint` (#9898) …
Deleted topological_space.countable_of_is_open_of_disjointView on Github →
2021-10-05 21:57
src/topology/bases.lean
feat(topology/bases): a family of nonempty disjoint open sets is countable in a separable space (#9557) …
Added topological_space.countable_of_is_open_of_disjointView on Github →