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Theorem is_open_and

Modification history

2021-05-19 12:41
src/topology/basic.lean
refactor(topology/basic): use dot notation in `is_open.union` and friends (#7647) …
Deleted is_open_andView on Github →
2017-09-06 19:31
topology/topological_space.lean
feat(topology): restructure order topologies; (start) proof that ennreal is a topological monoid
Added is_open_andView on Github →