User Pace Nielsen

57 votes

Accepted

$R$ is isomorphic to $R[X,Y]$, but not to $R[X]$

answered Dec 28, 2015 at 16:54

42 votes

Heuristic argument for the Riemann Hypothesis

answered Aug 31, 2019 at 7:39

40 votes

On math looking obvious in retrospect

answered Aug 11, 2019 at 22:04

40 votes

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Have there been any updates on Mochizuki's proposed proof of the abc conjecture?

answered Feb 25, 2016 at 15:34

39 votes

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Iterated logarithms in analytic number theory

answered Nov 16, 2021 at 4:43

29 votes

Slick proof?: A vector space has the same dimension as its dual if and only if it is finite dimensional

answered Jan 29, 2010 at 18:09

26 votes

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Should I publish a paper if its results overlap significantly with an earlier paper?

answered Sep 1, 2018 at 16:57

25 votes

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How to quickly determine whether a given natural number is a power of another natural number?

answered Feb 2, 2010 at 19:03

24 votes

How to know if somebody else is also working on your problem?

answered Apr 27, 2010 at 15:47

22 votes

Algebraic Attacks on the Odd Perfect Number Problem

answered Sep 20, 2010 at 21:46

22 votes

Subtraction-free identities that hold for rings but not for semirings?

answered Aug 6, 2021 at 21:46

22 votes

Most important results in 2022

answered Dec 5, 2022 at 17:37

21 votes

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Roots of this sextic

answered May 24, 2023 at 19:34

21 votes

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Possible contemporary improvement to bounded gaps between primes?

answered May 7, 2021 at 16:16

19 votes

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Is the hierarchy of relative geometric constructibility by straightedge and compass a dense order?

answered Nov 28, 2021 at 19:28

18 votes

Choice vs. countable choice

answered Apr 29, 2010 at 19:19

18 votes

MathScinet reviewing: should I check the proofs?

answered Jan 6, 2015 at 2:51

17 votes

Should one post a paper on the arXiv if it is not intended to be published?

answered Apr 1, 2015 at 21:51

16 votes

Using a known result without a specific reference

answered Nov 28, 2017 at 20:12

15 votes

Citing exercises in an article

answered May 2, 2017 at 17:45

15 votes

Conceptual reason why the sign of a permutation is well-defined?

answered Mar 10, 2022 at 6:04

14 votes

Can the fugitive escape?

answered Apr 19, 2021 at 15:09

14 votes

Proofs that require fundamentally new ways of thinking

answered Aug 29, 2011 at 14:45

13 votes

Uncountable counterexamples in algebra

answered May 10, 2021 at 2:15

13 votes

Accepted

May $p^3$ divide $(a+b)^p-a^p-b^p$?

answered Nov 29, 2016 at 14:57

13 votes

What is the smallest group not known to be a Galois group over $\mathbb{Q}$?

answered Mar 21, 2023 at 22:59

13 votes

Does this number exist?

answered Aug 1, 2023 at 19:24

12 votes

Publishing papers that became classics before they were submitted

answered Jun 6, 2022 at 1:10

12 votes

Nonequivalent definitions in Mathematics

answered Nov 22, 2017 at 23:03

12 votes

Why not adopt the constructibility axiom $V=L$?

answered May 20, 2019 at 1:02

Stack Exchange Network

190 Answers

$R$ is isomorphic to $R[X,Y]$, but not to $R[X]$

Heuristic argument for the Riemann Hypothesis

On math looking obvious in retrospect

Have there been any updates on Mochizuki's proposed proof of the abc conjecture?

Iterated logarithms in analytic number theory

Slick proof?: A vector space has the same dimension as its dual if and only if it is finite dimensional

Should I publish a paper if its results overlap significantly with an earlier paper?

How to quickly determine whether a given natural number is a power of another natural number?

How to know if somebody else is also working on your problem?

Algebraic Attacks on the Odd Perfect Number Problem

Subtraction-free identities that hold for rings but not for semirings?

Most important results in 2022

Roots of this sextic

Possible contemporary improvement to bounded gaps between primes?

Is the hierarchy of relative geometric constructibility by straightedge and compass a dense order?

Choice vs. countable choice

MathScinet reviewing: should I check the proofs?

Should one post a paper on the arXiv if it is not intended to be published?

Using a known result without a specific reference

Citing exercises in an article

Conceptual reason why the sign of a permutation is well-defined?

Can the fugitive escape?

Proofs that require fundamentally new ways of thinking

Uncountable counterexamples in algebra

May $p^3$ divide $(a+b)^p-a^p-b^p$?

What is the smallest group not known to be a Galois group over $\mathbb{Q}$?

Does this number exist?

Publishing papers that became classics before they were submitted

Nonequivalent definitions in Mathematics

Why not adopt the constructibility axiom $V=L$?