User Douglas Zare

166 votes

Accepted

Google question: In a country in which people only want boys

answered Mar 12, 2010 at 9:37

65 votes

Which mathematicians have influenced you the most?

answered Mar 26, 2010 at 5:09

57 votes

What are your favorite instructional counterexamples?

answered Mar 4, 2010 at 1:43

54 votes

Accepted

Why is it hard to prove that the Euler Mascheroni constant is irrational?

answered May 2, 2013 at 3:15

48 votes

Which popular games are the most mathematical?

answered Feb 1, 2010 at 9:54

46 votes

Examples of theorems misapplied to non-mathematical contexts

answered Apr 12, 2011 at 17:32

42 votes

Most harmful heuristic?

answered Apr 17, 2013 at 21:34

36 votes

What advantage humans have over computers in mathematics?

answered Mar 15, 2016 at 21:47

35 votes

Cocktail party math

answered Jan 30, 2010 at 2:13

34 votes

Accepted

What is the effect of adding 1/2 to a continued fraction?

answered Apr 25, 2013 at 4:36

32 votes

Most intricate and most beautiful structures in mathematics

answered Dec 14, 2010 at 0:51

31 votes

Theorems with unexpected conclusions

answered Mar 14, 2010 at 5:49

30 votes

Accepted

What is the probability that two random walkers will meet?

answered Aug 13, 2010 at 10:31

29 votes

Accepted

Do the Baumslag-Solitar groups occur in nature?

answered Mar 16, 2010 at 20:12

28 votes

What "real life" problems can be solved using billiards?

answered Feb 5, 2015 at 22:21

27 votes

Accepted

For a linear recurrence sequence $(u_n)_{n\geq 0}$, can $\{i \mid u_i > 0\}$ be the set of Fibonacci numbers?

answered Nov 1, 2015 at 18:10

26 votes

Is the matrix $\left({2m\choose 2j-i}\right)_{i,j=1}^{2m-1}$ nonsingular?

answered Dec 29, 2016 at 6:59

26 votes

Structures that turn out to exhibit a symmetry even though their definition doesn't

answered Dec 14, 2013 at 11:03

25 votes

What relationship, if any, is there between the diameter of the Cayley graph and the average distance between group elements?

answered Apr 13, 2011 at 0:06

25 votes

the perimeter of a non-convex set

answered May 16, 2014 at 5:30

24 votes

Accepted

Is there an algebraic formula for the eigenvalues of a symmetric $n\times n$ matrix?

answered Apr 28, 2017 at 3:33

23 votes

Accepted

A point set of power series with coefficients in {-1, 1}. Connected or not?

answered Nov 20, 2015 at 12:03

22 votes

Accepted

Expected number of pinballs to light up all 3 channels

answered Sep 20, 2010 at 21:25

22 votes

Can every $\mathbb{Z}^2$ disk be pinball-reached?

answered Apr 20, 2013 at 9:19

21 votes

How do you mentor undergraduate research?

answered Apr 7, 2016 at 7:07

20 votes

Show that this ratio of factorials is always an integer

answered May 11, 2013 at 14:45

20 votes

Accepted

Is the matrix ring $\mathrm{Mat}_n(\mathbb{C})$ "algebraically closed"?

answered Feb 1, 2010 at 11:25

19 votes

Which popular games are the most mathematical?

answered Feb 1, 2010 at 13:51

19 votes

What to look for in applicants to graduate programs (in mathematics)?

answered Feb 20, 2010 at 5:58

19 votes

Sum of 'the first k' binomial coefficients for fixed $N$

answered Mar 6, 2010 at 2:30

Stack Exchange Network

423 Answers

Google question: In a country in which people only want boys

Which mathematicians have influenced you the most?

What are your favorite instructional counterexamples?

Why is it hard to prove that the Euler Mascheroni constant is irrational?

Which popular games are the most mathematical?

Examples of theorems misapplied to non-mathematical contexts

Most harmful heuristic?

What advantage humans have over computers in mathematics?

Cocktail party math

What is the effect of adding 1/2 to a continued fraction?

Most intricate and most beautiful structures in mathematics

Theorems with unexpected conclusions

What is the probability that two random walkers will meet?

Do the Baumslag-Solitar groups occur in nature?

What "real life" problems can be solved using billiards?

For a linear recurrence sequence $(u_n)_{n\geq 0}$, can $\{i \mid u_i > 0\}$ be the set of Fibonacci numbers?

Is the matrix $\left({2m\choose 2j-i}\right)_{i,j=1}^{2m-1}$ nonsingular?

Structures that turn out to exhibit a symmetry even though their definition doesn't

What relationship, if any, is there between the diameter of the Cayley graph and the average distance between group elements?

the perimeter of a non-convex set

Is there an algebraic formula for the eigenvalues of a symmetric $n\times n$ matrix?

A point set of power series with coefficients in {-1, 1}. Connected or not?

Expected number of pinballs to light up all 3 channels

Can every $\mathbb{Z}^2$ disk be pinball-reached?

How do you mentor undergraduate research?

Show that this ratio of factorials is always an integer

Is the matrix ring $\mathrm{Mat}_n(\mathbb{C})$ "algebraically closed"?

Which popular games are the most mathematical?

What to look for in applicants to graduate programs (in mathematics)?

Sum of 'the first k' binomial coefficients for fixed $N$