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Theorem topological_space.opens.ext_iff

Modification history

2023-02-09 19:18
src/topology/sets/opens.lean
refactor(topology/sets/opens): use a `structure` for `opens` and `open_nhds_of` (#18409) …
Deleted topological_space.opens.ext_iffView on Github →
2022-03-10 07:37
src/topology/opens.lean
refactor(topology/opens): Turn `opens.gi` into a Galois coinsertion (#12547) …
Modified topological_space.opens.ext_iffView on Github →
2020-07-06 07:16
src/topology/opens.lean
feat(topology): preliminaries for Haar measure (#3194) …
Added topological_space.opens.ext_iffView on Github →