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Theorem topological_space.is_countably_generated_nhds_within

Modification history

2021-10-23 17:11
src/topology/bases.lean
refactor(order/filter/bases): turn `is_countably_generated` into a class (#9838) …
Deleted topological_space.is_countably_generated_nhds_withinView on Github →
2020-09-09 23:56
src/topology/bases.lean
feat(topology): misc topological lemmas (#4091) …
Added topological_space.is_countably_generated_nhds_withinView on Github →