User Michael Hardy

150 votes

45 answers

29k views

Nontrivial theorems with trivial proofs

asked Jun 20, 2010 at 1:04

107 votes

36 answers

20k views

Interesting examples of vacuous / void entities

asked Nov 13, 2010 at 19:47

63 votes

20 answers

13k views

What should we teach to liberal arts students who will take only one math course?

asked Jun 18, 2010 at 23:53

45 votes

5 answers

3k views

How many rearrangements must fail to alter the value of a sum before you conclude that none do?

asked Aug 13, 2015 at 17:07

33 votes

8 answers

6k views

Uninteresting questions with interesting answers [closed]

asked Mar 24, 2015 at 4:31

30 votes

1 answer

1k views

Rearrangements that never change the value of a sum

asked Aug 4, 2015 at 20:48

28 votes

6 answers

2k views

Multiplying by irrational numbers in combinatorial problems

asked Sep 17, 2013 at 23:23

26 votes

2 answers

2k views

Singmaster's conjecture

asked Jun 19, 2010 at 2:32

25 votes

5 answers

3k views

Simple but serious problems for the edification of non-mathematicians

asked Feb 1, 2011 at 1:35

24 votes

11 answers

8k views

The role of the mean value theorem (MVT) in first-year calculus

asked Jul 11, 2010 at 17:05

20 votes

5 answers

4k views

Advanced view of the napkin ring problem?

asked Aug 31, 2010 at 19:01

19 votes

1 answer

763 views

convexity of images of space-filling curves

asked Nov 2, 2011 at 17:08

18 votes

1 answer

1k views

Riemann's $\zeta$ function and the uniform distribution on $[-1,0]$

asked Sep 16, 2011 at 22:29

18 votes

1 answer

924 views

Is the Robertson–Seymour theorem equivalent to the compactness of some topological space?

asked May 31, 2023 at 17:16

15 votes

4 answers

6k views

Mathematicians learning from applications to other fields

asked May 4, 2022 at 18:16

14 votes

1 answer

3k views

Geometric meaning of a trigonometric identity

asked Jul 30, 2011 at 23:00

13 votes

0 answers

1k views

Small primes attract large primes

asked Oct 19, 2011 at 23:22

11 votes

3 answers

2k views

Nontrivial trivial integrals

asked Feb 19, 2013 at 4:21

11 votes

2 answers

1k views

Jacobi's elliptic functions and plane sections of a torus

asked Jan 22, 2017 at 0:33

11 votes

2 answers

1k views

Which trigonometric identities involve trigonometric functions?

asked Jan 19, 2012 at 21:45

11 votes

4 answers

857 views

Interesting examples of systems of linear differential equations with constant coefficients

asked Nov 17, 2023 at 4:41

10 votes

2 answers

469 views

Generalizations of the Robbins lemma and Gaussian integration by parts

asked Apr 14, 2017 at 19:05

10 votes

0 answers

303 views

Testing contrasts in statistics: Is this provably a hard problem, or not?

asked Jun 4, 2013 at 22:35

9 votes

5 answers

384 views

Probability theory without deductive closure

asked Apr 24, 2016 at 18:19

9 votes

1 answer

440 views

Combinatorics and symmetric functions

asked Jun 26, 2014 at 20:07

9 votes

2 answers

668 views

Product rules are local and covariance identities are global

asked Jun 12, 2011 at 0:04

9 votes

4 answers

1k views

Name for a basic principle of calculus?

asked Oct 15, 2010 at 22:37

9 votes

1 answer

2k views

What topics should be included in a calculus-for-the-liberal arts course?

asked Nov 10, 2010 at 20:27

9 votes

2 answers

813 views

How can these statistical arguments be made logically rigorous?

asked Dec 15, 2010 at 19:41

9 votes

2 answers

3k views

Sums of arctangents

asked Dec 27, 2010 at 5:31

Stack Exchange Network

112 Questions

Nontrivial theorems with trivial proofs

Interesting examples of vacuous / void entities

What should we teach to liberal arts students who will take only one math course?

How many rearrangements must fail to alter the value of a sum before you conclude that none do?

Uninteresting questions with interesting answers [closed]

Rearrangements that never change the value of a sum

Multiplying by irrational numbers in combinatorial problems

Singmaster's conjecture

Simple but serious problems for the edification of non-mathematicians

The role of the mean value theorem (MVT) in first-year calculus

Advanced view of the napkin ring problem?

convexity of images of space-filling curves

Riemann's $\zeta$ function and the uniform distribution on $[-1,0]$

Is the Robertson–Seymour theorem equivalent to the compactness of some topological space?

Mathematicians learning from applications to other fields

Geometric meaning of a trigonometric identity

Small primes attract large primes

Nontrivial trivial integrals

Jacobi's elliptic functions and plane sections of a torus

Which trigonometric identities involve trigonometric functions?

Interesting examples of systems of linear differential equations with constant coefficients

Generalizations of the Robbins lemma and Gaussian integration by parts

Testing contrasts in statistics: Is this provably a hard problem, or not?

Probability theory without deductive closure

Combinatorics and symmetric functions

Product rules are local and covariance identities are global

Name for a basic principle of calculus?

What topics should be included in a calculus-for-the-liberal arts course?

How can these statistical arguments be made logically rigorous?

Sums of arctangents