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Second-countable Hausdorff space
Set
context
X
definiendum
⟨
X
,
T
⟩
∈
it
inclusion
⟨
X
,
T
⟩
… Second-countable space
inclusion
⟨
X
,
T
⟩
… Hausdorff space
Discussion
Parents
Subset of
Hausdorff space
,
Second-countable space