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Theorem is_clopen_inter

Modification history

2021-05-19 12:41
src/topology/subset_properties.lean
refactor(topology/basic): use dot notation in `is_open.union` and friends (#7647) …
Deleted is_clopen_interView on Github →
2019-03-03 19:05
src/topology/basic.lean
chore(topology): Splits topology.basic and topology.continuity (#785) …
Modified is_clopen_interView on Github →
2018-11-05 09:01
analysis/topology/topological_space.lean
feat(analysis/topology/topological_space): define T0 spaces, T4 spaces, connected and irreducible sets and components (#448)
Added is_clopen_interView on Github →