Mathlib Map

Structures · Topology

SecondCountableTopology

A second-countable space is one with a countable basis.

Defined in
Mathlib.Topology.Bases
Shape
One type argument · adds is_open_generated_countable

Extends0

Extends nothing: this is a root of the hierarchy.

Extended by1

Concrete types that are instances25

  • Real
  • TopCat.carrier
  • NNReal
  • ContinuousLinearMap
  • ENNReal
  • DomMulAct
  • WithLp
  • EReal
  • DomAddAct
  • TopologicalSpace.NonemptyCompacts
  • TopologicalSpace.Compacts
  • PiLp
  • UpperHalfPlane
  • Metric.Snowflaking
  • GromovHausdorff.GHSpace
  • TopologicalSpace.Opens.CompleteCopy
  • Subtype
  • Prod
  • OrderDual
  • Set.Elem
  • HasQuotient.Quotient
  • ContinuousMap
  • WithTop
  • Sum
  • Sigma

How is a type an instance?

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Assumed by699

Ancestors0

No ancestors.