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Theorem topological_space.mem_basis_subset_of_mem_open

Modification history

2021-04-01 01:24
src/topology/bases.lean
refactor(topology/bases): use `structure` for `is_topological_basis (#6947) …
Deleted topological_space.mem_basis_subset_of_mem_openView on Github →
2019-03-03 19:05
src/topology/bases.lean
chore(topology): Splits topology.basic and topology.continuity (#785) …
Modified topological_space.mem_basis_subset_of_mem_openView on Github →
2018-04-16 19:00
analysis/topology/topological_space.lean
feat(analysis/topology/topological_space): basis elements are open
Added topological_space.mem_basis_subset_of_mem_openView on Github →