A dense countable subset of a second-countable topological space #
noncomputable def
denseCountable
(T : Type u_1)
[TopologicalSpace T]
[SecondCountableTopology T]
:
Set T
A countable dense subset of a second-countable topological space.
Equations
- denseCountable T = ⋯.choose
Instances For
theorem
dense_denseCountable
{T : Type u_1}
[TopologicalSpace T]
[SecondCountableTopology T]
:
Dense (denseCountable T)