User Yemon Choi

189 votes

Not especially famous, long-open problems which anyone can understand

answered Jun 21, 2012 at 19:38

104 votes

Geometric interpretation of trace

answered Jan 31, 2010 at 2:05

75 votes

Accepted

Which journals publish expository work?

answered Feb 15, 2010 at 21:29

73 votes

Accepted

Eigenvalues of matrix sums

answered Nov 5, 2009 at 9:55

40 votes

What is the main goal of a paper, really?

answered Dec 10, 2011 at 1:00

33 votes

Is there a compact group of countably infinite cardinality?

answered Nov 10, 2009 at 22:50

32 votes

What is the most useful non-existing object of your field?

answered Sep 28, 2014 at 22:48

31 votes

What are fixed points of the Fourier Transform

answered Jan 17, 2010 at 0:04

30 votes

Describe a topic in one sentence.

answered Oct 25, 2009 at 9:53

25 votes

Each mathematician has only a few tricks

answered Jun 17, 2020 at 0:00

24 votes

Accepted

Does there exist a continuous function of compact support with Fourier transform outside L^1?

answered Nov 2, 2009 at 12:36

24 votes

How to select a journal?

answered Nov 30, 2009 at 17:51

23 votes

Why do so many textbooks have so much technical detail and so little enlightenment?

answered Jan 27, 2010 at 4:32

21 votes

What are some very important papers published in non-top journals?

answered Nov 9, 2015 at 19:05

20 votes

Accepted

Are algebraically isomorphic $C^$-algebras $$-isomorphic?

answered Mar 7, 2018 at 2:42

20 votes

Jean Bourgain's relatively lesser known significant contributions

answered Jan 2, 2019 at 4:05

20 votes

Probabilistic proofs of analytic facts

answered Dec 18, 2009 at 7:30

19 votes

Accepted

Do torsion-free groups give projectionless group ($C^\ast$) algebras?

answered Oct 30, 2009 at 22:12

19 votes

Is Fourier analysis a special case of representation theory or an analogue?

answered Aug 29, 2010 at 7:19

19 votes

Books you would like to read (if somebody would just write them…)

answered Jan 24, 2011 at 19:36

18 votes

Results true in a dimension and false for higher dimensions

answered Sep 14, 2014 at 17:44

18 votes

Fundamental problems whose solution seems completely out of reach

answered Jul 1, 2012 at 10:19

18 votes

Famous vacuously true statements

answered Aug 17, 2013 at 23:53

17 votes

Accepted

Square of non-zero element in group algebra is always non-zero?

answered Feb 17, 2016 at 17:52

17 votes

Accepted

Banach spaces with few linear operators ?

answered Jul 5, 2010 at 20:26

16 votes

Finding questions between functional analysis and set theory

answered Mar 22, 2010 at 17:15

16 votes

Is Thompson's group F residually finite?

answered Jan 31, 2010 at 23:26

15 votes

Interesting applications of the pigeonhole principle

answered Nov 5, 2009 at 18:43

15 votes

What's a groupoid? What's a good example of a groupoid?

answered Oct 19, 2009 at 1:09

15 votes

What are some very important papers published in non-top journals?

answered Nov 6, 2015 at 17:28

Stack Exchange Network

356 Answers

Not especially famous, long-open problems which anyone can understand

Geometric interpretation of trace

Which journals publish expository work?

Eigenvalues of matrix sums

What is the main goal of a paper, really?

Is there a compact group of countably infinite cardinality?

What is the most useful non-existing object of your field?

What are fixed points of the Fourier Transform

Describe a topic in one sentence.

Each mathematician has only a few tricks

Does there exist a continuous function of compact support with Fourier transform outside L^1?

How to select a journal?

Why do so many textbooks have so much technical detail and so little enlightenment?

What are some very important papers published in non-top journals?

Are algebraically isomorphic $C^$-algebras $$-isomorphic?

Jean Bourgain's relatively lesser known significant contributions

Probabilistic proofs of analytic facts

Do torsion-free groups give projectionless group ($C^\ast$) algebras?

Is Fourier analysis a special case of representation theory or an analogue?

Books you would like to read (if somebody would just write them…)

Results true in a dimension and false for higher dimensions

Fundamental problems whose solution seems completely out of reach

Famous vacuously true statements

Square of non-zero element in group algebra is always non-zero?

Banach spaces with few linear operators ?

Finding questions between functional analysis and set theory

Is Thompson's group F residually finite?

Interesting applications of the pigeonhole principle

What's a groupoid? What's a good example of a groupoid?

What are some very important papers published in non-top journals?