User Joseph Van Name

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Examples of eventual counterexamples

answered Mar 8, 2019 at 4:28

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An example of a $T_1$ space where all closed $G_\delta$ sets are zero-sets, but it isn't normal

answered Jun 11, 2021 at 14:56

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Connectedness of Invertible elements in a non- commutative C*- algebra

answered Aug 4, 2021 at 12:21

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Examples of common false beliefs in mathematics

answered Aug 11, 2017 at 12:58

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Why are so few operations with arity bigger than 2?

answered May 12, 2017 at 4:12

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An example of a frame homomorphism which does not preserve Heyting implication

answered Aug 31, 2016 at 13:51

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Arguments against large cardinals

answered Dec 6, 2016 at 16:03

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Posets isomorphic to their endomorphism poset

answered Jul 15, 2015 at 22:02

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When is any convergence sequence is stationary?

answered Sep 8, 2015 at 1:37

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Are lattices quotients of their Dedekind-MacNeille completion?

answered Oct 3, 2015 at 21:32

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Non-principal prime ideals in infinite distributive lattices

answered Oct 9, 2015 at 18:06

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Spaces for which separable is equivalent to second-countable

answered Mar 8, 2015 at 14:59

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Paracompact zero-dimensional space without clopen partition refinement

answered Jan 19, 2015 at 9:35

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Measure with `somewhere dense' support

answered Apr 7, 2015 at 1:32

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Measure with `somewhere dense' support

answered Apr 7, 2015 at 2:34

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Is the associated order of a minimal $T_0$ space always total?

answered Mar 31, 2015 at 15:23

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A clear map of mathematical approaches to Artificial Intelligence

answered Dec 13, 2023 at 22:12

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When can we find a net, defined on a totally ordered index set, converging to a non-isolated point in a compact Hausdorff space?

answered Mar 20, 2023 at 15:00

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A stronger version of paracompactness

answered Nov 3, 2022 at 15:59

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A question about regular closed sets

answered Apr 8, 2023 at 20:45

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Neural networks over gadgets other than $\mathbb{R}$

answered Jun 7, 2023 at 12:03

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$|\mathsf{RO}(X)|$ vs. $2^{d(X)}$ for $T_3$ spaces

answered Jul 10, 2022 at 21:38

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Restriction to dense subset of functions whose graph is dense

answered Oct 7, 2022 at 16:02

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Limit of zero sets of harmonic functions

answered Oct 7, 2022 at 22:26

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Matrix determinant lemma for non-rank-one updates

answered Oct 3, 2022 at 13:29

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Is the set of $\kappa$-complete ultrafilters closed in $\beta X$?

answered Oct 11, 2021 at 9:52

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Relation graph isomorphism to discrete logarithm

answered Nov 29, 2021 at 1:39

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Motivation for Laver's use of large cardinals to show finite combinatorial properties of Laver tables

answered Dec 17, 2021 at 6:43

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Constructive lattice completion

answered Oct 14, 2021 at 3:36

4 votes

Diffie Hellman cryptography based on graph isomorphism?

answered Nov 17, 2021 at 18:49

Stack Exchange Network

423 Answers

Examples of eventual counterexamples

An example of a $T_1$ space where all closed $G_\delta$ sets are zero-sets, but it isn't normal

Connectedness of Invertible elements in a non- commutative C*- algebra

Examples of common false beliefs in mathematics

Why are so few operations with arity bigger than 2?

An example of a frame homomorphism which does not preserve Heyting implication

Arguments against large cardinals

Posets isomorphic to their endomorphism poset

When is any convergence sequence is stationary?

Are lattices quotients of their Dedekind-MacNeille completion?

Non-principal prime ideals in infinite distributive lattices

Spaces for which separable is equivalent to second-countable

Paracompact zero-dimensional space without clopen partition refinement

Measure with `somewhere dense' support

Measure with `somewhere dense' support

Is the associated order of a minimal $T_0$ space always total?

A clear map of mathematical approaches to Artificial Intelligence

When can we find a net, defined on a totally ordered index set, converging to a non-isolated point in a compact Hausdorff space?

A stronger version of paracompactness

A question about regular closed sets

Neural networks over gadgets other than $\mathbb{R}$

$|\mathsf{RO}(X)|$ vs. $2^{d(X)}$ for $T_3$ spaces

Restriction to dense subset of functions whose graph is dense

Limit of zero sets of harmonic functions

Matrix determinant lemma for non-rank-one updates

Is the set of $\kappa$-complete ultrafilters closed in $\beta X$?

Relation graph isomorphism to discrete logarithm

Motivation for Laver's use of large cardinals to show finite combinatorial properties of Laver tables

Constructive lattice completion

Diffie Hellman cryptography based on graph isomorphism?