User Gerald Edgar

150 votes

What are your favorite instructional counterexamples?

answered Mar 6, 2010 at 14:38

138 votes

Most interesting mathematics mistake?

answered Oct 17, 2009 at 17:23

77 votes

Which math paper maximizes the ratio (importance)/(length)?

answered Dec 1, 2009 at 13:29

68 votes

Nonequivalent definitions in Mathematics

answered Nov 23, 2017 at 0:39

65 votes

Which mathematicians have influenced you the most?

answered Nov 14, 2009 at 19:43

51 votes

Accepted

"Strange" proofs of existence theorems

answered Oct 10, 2018 at 12:51

50 votes

Accepted

Blackboard rendering of math fonts

answered Nov 18, 2009 at 13:30

50 votes

Which journals publish expository work?

answered Feb 17, 2010 at 12:37

49 votes

Accepted

Rejection for a seemingly odd reason

answered Jun 12, 2022 at 14:44

47 votes

Rediscovery of lost mathematics

answered Jul 18, 2014 at 2:33

46 votes

Which great mathematicians had great political commitments?

answered Feb 17, 2021 at 22:52

44 votes

Accepted

"Closed-form" functions with half-exponential growth

answered Nov 9, 2010 at 19:30

40 votes

Accepted

Is it best to run or walk in the rain?

answered Nov 18, 2009 at 13:09

38 votes

Which journals publish expository work?

answered Feb 17, 2010 at 16:31

38 votes

Jokes in the sense of Littlewood: examples?

answered Sep 25, 2010 at 14:07

38 votes

If $f$ is infinitely differentiable then $f$ coincides with a polynomial

answered May 8, 2011 at 2:12

35 votes

Accepted

Are there non-reflexive vector spaces isomorphic to their bi-dual?

answered Oct 28, 2010 at 15:44

34 votes

Accepted

Is a inverse limit of compact spaces again compact ?

answered Mar 18, 2010 at 15:38

34 votes

Papers that debunk common myths in the history of mathematics

answered Jun 2, 2010 at 17:26

33 votes

Accepted

What is the indefinite sum of tan(x)?

answered Oct 21, 2010 at 0:23

31 votes

What's an example of a space that needs the Hahn-Banach Theorem?

answered Nov 14, 2009 at 20:17

30 votes

Best online mathematics videos?

answered Oct 21, 2009 at 20:44

30 votes

The concept of duality

answered Aug 26, 2011 at 0:28

30 votes

Examples of conjectures that were widely believed to be true but later proved false

answered May 3, 2012 at 15:01

29 votes

A rare property of Hausdorff spaces

answered Aug 9, 2016 at 13:42

29 votes

Accepted

About the Riemann integrability of composite functions

answered Apr 1, 2010 at 12:09

29 votes

Every mathematician has only a few tricks

answered Jun 15, 2020 at 16:16

28 votes

Can you do math without knowing how to count?

answered Apr 17, 2021 at 17:26

28 votes

What are the reasons for considering rings without identity?

answered Apr 26, 2010 at 12:12

28 votes

Still Difficult After All These Years

answered Nov 2, 2010 at 18:27

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755 Answers

What are your favorite instructional counterexamples?

Most interesting mathematics mistake?

Which math paper maximizes the ratio (importance)/(length)?

Nonequivalent definitions in Mathematics

Which mathematicians have influenced you the most?

"Strange" proofs of existence theorems

Blackboard rendering of math fonts

Which journals publish expository work?

Rejection for a seemingly odd reason

Rediscovery of lost mathematics

Which great mathematicians had great political commitments?

"Closed-form" functions with half-exponential growth

Is it best to run or walk in the rain?

Which journals publish expository work?

Jokes in the sense of Littlewood: examples?

If $f$ is infinitely differentiable then $f$ coincides with a polynomial

Are there non-reflexive vector spaces isomorphic to their bi-dual?

Is a inverse limit of compact spaces again compact ?

Papers that debunk common myths in the history of mathematics

What is the indefinite sum of tan(x)?

What's an example of a space that needs the Hahn-Banach Theorem?

Best online mathematics videos?

The concept of duality

Examples of conjectures that were widely believed to be true but later proved false

A rare property of Hausdorff spaces

About the Riemann integrability of composite functions

Every mathematician has only a few tricks

Can you do math without knowing how to count?

What are the reasons for considering rings without identity?

Still Difficult After All These Years