Mathlib v3 is deprecated. Go to Mathlib v4

Theorem topological_space.countable_countable_basis

Modification history

2022-06-22 18:31
src/topology/bases.lean
refactor(data/set/countable): make `set.countable` protected (#14886) …
Modified topological_space.countable_countable_basisView on Github →
2021-04-01 01:24
src/topology/bases.lean
refactor(topology/bases): use `structure` for `is_topological_basis (#6947) …
Added topological_space.countable_countable_basisView on Github →