Theorems · Theorem · general topology
TopologicalSpace.IsTopologicalBasis.secondCountableTopology
∀ {α : Type u} [t : TopologicalSpace α] {b : Set (Set α)},
TopologicalSpace.IsTopologicalBasis b → b.Countable → SecondCountableTopology α- Defined in
- Mathlib.Topology.Bases
- Cited by
- 1 results in Mathlib
- Foundations
- Depth 9 from the axioms · uses no axioms
- Assumes
- TopologicalSpace
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites6
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- Setstatement and proof · cited by 53,352
- TopologicalSpacestatement and proof · cited by 24,529
- SecondCountableTopologystatement · cited by 750
- Set.Countablestatement and proof · cited by 545
- TopologicalSpace.IsTopologicalBasisstatement and proof · cited by 126
- TopologicalSpace.IsTopologicalBasis.eq_generateFromproof · cited by 10
Cited by1
Results whose statement or proof uses this declaration.
- TopologicalSpace.secondCountableTopology_of_countable_coverproof · cited by 1