List questions from separation-axioms

Published on 05 Feb 2020 - 23:31

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$T_4$-ness that is preserved by product

Published on 12 Feb 2020 - 6:32

66

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Checking separation axioms against topological basis

Published on 20 Feb 2020 - 8:35

38

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Checking separation axioms against topological sub-basis

Published on 21 Feb 2020 - 10:06

58

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Deducing two points are topologically indistinguishable by sub-base

Published on 23 Feb 2020 - 10:12

82

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Hausdorffness on Topological Quotient Group

Published on 25 Feb 2020 - 17:51

63

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$T_1$-property of cofinite topology.

Published on 10 Mar 2020 - 10:54

125

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Cardinals comparison in Jones' lemma

Published on 11 Mar 2020 - 15:58

37

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Can we find $\lambda$ with $B(\lambda, |\lambda|) \subseteq K?$

Published on 29 Mar 2020 - 12:57

429

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Proof: Every point-finite open cover in a normal space has an open shrinkage

Published on 31 Mar 2020 - 21:01

465

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Questions about completely normal spaces.

Published on 23 Feb 2026 - 4:50

265

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Is there typographical error in Stephen Willard's General Topology proof of Theorem 28.11

Published on 11 Apr 2020 - 0:15

578

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Proving $R_L \times R_L$ is completely regular. Meaning $R_L \times R_L$ is an example of a space which is completely regular, but not normal

Published on 23 Feb 2026 - 4:59

43

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Separated set in subspace topology.

Published on 19 Apr 2020 - 4:33

116

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Additional consequence of Urysohn's Lemma?

Published on 20 Apr 2020 - 14:17

List Question

can we "represent" this finite topology as submodules of $R^X$?

$T_4$-ness that is preserved by product

Checking separation axioms against topological basis

Checking separation axioms against topological sub-basis

Deducing two points are topologically indistinguishable by sub-base

Hausdorffness on Topological Quotient Group

$T_1$-property of cofinite topology.

Cardinals comparison in Jones' lemma

Can we find $\lambda$ with $B(\lambda, |\lambda|) \subseteq K?$

Proof: Every point-finite open cover in a normal space has an open shrinkage

Questions about completely normal spaces.

Is there typographical error in Stephen Willard's General Topology proof of Theorem 28.11

Proving $R_L \times R_L$ is completely regular. Meaning $R_L \times R_L$ is an example of a space which is completely regular, but not normal

Separated set in subspace topology.

Additional consequence of Urysohn's Lemma?

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