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Theorem is_open_iff_mem_nhds

Modification history

2019-11-12 11:23
src/topology/basic.lean
style(*): use notation `𝓝` for `nhds` (#1582) …
Modified is_open_iff_mem_nhdsView on Github →
2019-03-08 08:46
src/topology/basic.lean
feat(*): has_mem (set α) (filter α) (#799)
Modified is_open_iff_mem_nhdsView on Github →
2017-12-07 00:39
analysis/topology/topological_space.lean
refactor(*): remove local simp AC lemmas …
Modified is_open_iff_mem_nhdsView on Github →
2017-11-30 22:10
analysis/topology/topological_space.lean
feat(data/analysis): calculations with filters / topologies + misc
Added is_open_iff_mem_nhdsView on Github →