User KP Hart

2 votes

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Smirnov's Deleted Sequence topology

answered May 13, 2012 at 20:17

2 votes

Axiomatic Set Theory

answered May 9, 2012 at 11:36

2 votes

Bases of completely regular (Tychonoff) spaces

answered May 27, 2012 at 14:17

2 votes

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Chaos in uniform spaces

answered Sep 14, 2010 at 9:31

2 votes

How to understand the concept of compact space

answered May 26, 2010 at 11:13

2 votes

Bijective function on a dense set

answered Oct 30, 2011 at 22:32

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zeroset-diagonal

answered Oct 19, 2011 at 19:30

2 votes

A Bijection Between the Reals and Infinite Binary Strings

answered May 14, 2011 at 20:18

2 votes

End point compactification for metric spaces

answered Oct 28, 2010 at 9:58

2 votes

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Approximations by compact sub-spaces

answered Feb 10, 2022 at 8:30

2 votes

Putting $\omega$ into $\alpha$ boxes where $\alpha \in \big(\omega\cup\{\omega\}\big)\setminus\{0,1\}$

answered Aug 16, 2021 at 19:17

2 votes

Can this ultrafilter convergence condition be expressed as a compactness condition?

answered Jan 6, 2021 at 12:05

2 votes

Mysior's example of not completely Hausdorff space

answered Jan 28, 2020 at 21:03

2 votes

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Showing that $C(X,Y)$ is separable when $X$ is compact Hausdorff but $Y$ is just a separable Frechet space

answered Jul 13, 2021 at 13:39

2 votes

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Large chromatic number in hypergraphs with large edges

answered Jun 20, 2021 at 9:48

2 votes

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extending disjoint open subsets of a normal Hausdorff space

answered May 31, 2021 at 14:47

2 votes

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Minimizing the set of "wrong" edges in $K_\omega$ with $\{0,1\}$-weights

answered Nov 27, 2018 at 20:06

2 votes

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Cardinality of the topology in countable connected $T_2$-spaces

answered Nov 9, 2018 at 13:03

2 votes

Does using continued fractions work to give a homeomorphism $\mathbb{Q}^+ \rightarrow (\mathbb{Q}^+)^2$?

answered Aug 21, 2019 at 9:33

2 votes

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Normal $0,1$-sequence with infinitely many frequent finite substrings

answered Aug 21, 2019 at 9:53

2 votes

Extending homeomorphisms between compact metric subsets

answered Oct 6, 2018 at 19:23

2 votes

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Can a Polish space have two different topologies?

answered Apr 14 at 12:44

2 votes

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Hahn-Banach theorem and ultrafilter lemma

answered Nov 30, 2023 at 20:23

2 votes

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Description of atomless complete Boolean algebras with a countable $\pi$-base

answered May 5 at 9:17

2 votes

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Complete CCC Boolean algebras (or Stonean spaces)

answered May 8 at 8:23

2 votes

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A question about G-Hewitt spaces

answered Nov 28 at 10:17

2 votes

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Is every subgroup closed in this complete, nondiscrete topological group?

answered Nov 13 at 9:22

2 votes

Extending $\mathbb{R}$ to a higher dimensional manifold

answered Apr 5 at 9:17

2 votes

A few questions about Tychonoff plank

answered Aug 13, 2023 at 10:12

2 votes

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Spectrum of continuous functions as a semigroup

answered Aug 15, 2023 at 14:29

Stack Exchange Network

213 Answers

Smirnov's Deleted Sequence topology

Axiomatic Set Theory

Bases of completely regular (Tychonoff) spaces

Chaos in uniform spaces

How to understand the concept of compact space

Bijective function on a dense set

zeroset-diagonal

A Bijection Between the Reals and Infinite Binary Strings

End point compactification for metric spaces

Approximations by compact sub-spaces

Putting $\omega$ into $\alpha$ boxes where $\alpha \in \big(\omega\cup\{\omega\}\big)\setminus\{0,1\}$

Can this ultrafilter convergence condition be expressed as a compactness condition?

Mysior's example of not completely Hausdorff space

Showing that $C(X,Y)$ is separable when $X$ is compact Hausdorff but $Y$ is just a separable Frechet space

Large chromatic number in hypergraphs with large edges

extending disjoint open subsets of a normal Hausdorff space

Minimizing the set of "wrong" edges in $K_\omega$ with $\{0,1\}$-weights

Cardinality of the topology in countable connected $T_2$-spaces

Does using continued fractions work to give a homeomorphism $\mathbb{Q}^+ \rightarrow (\mathbb{Q}^+)^2$?

Normal $0,1$-sequence with infinitely many frequent finite substrings

Extending homeomorphisms between compact metric subsets

Can a Polish space have two different topologies?

Hahn-Banach theorem and ultrafilter lemma

Description of atomless complete Boolean algebras with a countable $\pi$-base

Complete CCC Boolean algebras (or Stonean spaces)

A question about G-Hewitt spaces

Is every subgroup closed in this complete, nondiscrete topological group?

Extending $\mathbb{R}$ to a higher dimensional manifold

A few questions about Tychonoff plank

Spectrum of continuous functions as a semigroup