User Darsh Ranjan - MathOverflow

161 votes

Most harmful heuristic?

answered Oct 31, 2009 at 19:59

70 votes

Proofs without words

answered Dec 15, 2009 at 2:32

56 votes

Accepted

How is it that you can guess if one of a pair of random numbers is larger with probability > 1/2?

answered Dec 17, 2009 at 10:21

49 votes

Jokes in the sense of Littlewood: examples?

answered Sep 19, 2010 at 4:06

46 votes

Accepted

Fourier transform for dummies

answered Oct 14, 2009 at 21:53

45 votes

Truth of the Poisson summation formula

answered Feb 8, 2010 at 1:01

41 votes

Cool problems to impress students with group theory

answered Jan 29, 2010 at 3:13

40 votes

Free, high quality mathematical writing online?

answered Dec 19, 2009 at 4:13

39 votes

Fundamental Examples

answered Nov 11, 2009 at 8:07

33 votes

Colloquial catchy statements encoding serious mathematics

answered Dec 10, 2009 at 6:39

33 votes

What are fixed points of the Fourier Transform

answered Sep 18, 2010 at 1:47

30 votes

Can a mathematical definition be wrong?

answered May 17, 2011 at 6:02

29 votes

What programming languages do mathematicians use?

answered Jan 30, 2010 at 21:52

27 votes

What are some slogans that express mathematical tricks?

answered Dec 15, 2009 at 1:40

27 votes

Suggestions for good notation

answered Oct 27, 2010 at 8:13

22 votes

How to respond to "I was never much good at maths at school."

answered Nov 16, 2009 at 1:36

19 votes

Fundamental Examples

answered Nov 12, 2009 at 8:15

19 votes

What's your favorite equation, formula, identity or inequality?

answered Oct 30, 2009 at 0:58

17 votes

Generalizing a problem to make it easier

answered Nov 17, 2010 at 5:12

17 votes

Examples of using physical intuition to solve math problems

answered Nov 22, 2010 at 7:27

15 votes

A single paper everyone should read?

answered Feb 18, 2010 at 17:17

14 votes

Bizarre operation on polynomials

answered Jan 20, 2010 at 5:11

13 votes

Cures for mathematician's block (as in writer's block)

answered Nov 7, 2009 at 12:29

13 votes

Do convolution and multiplication satisfy any nontrivial algebraic identities?

answered Nov 15, 2009 at 6:52

12 votes

Why is it so cool to square numbers (in terms of finding the standard deviation)?

answered Oct 24, 2009 at 12:10

12 votes

Fundamental Examples

answered Dec 14, 2009 at 1:16

11 votes

Accepted

Finding minimal or canonical expressions for Boolean truth tables

answered Nov 10, 2009 at 23:44

11 votes

Accepted

The application of Lanczos Algorithm on sparse matrix

answered Dec 14, 2009 at 11:31

11 votes

Accepted

cardinal equivalence: for each boolean formula, |quantifications| = |assignments|.

answered Jan 22, 2010 at 5:14

9 votes

Accepted

Reporting all faces in a planar graph

answered May 8, 2010 at 20:07

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75 Answers

Most harmful heuristic?

Proofs without words

How is it that you can guess if one of a pair of random numbers is larger with probability > 1/2?

Jokes in the sense of Littlewood: examples?

Fourier transform for dummies

Truth of the Poisson summation formula

Cool problems to impress students with group theory

Free, high quality mathematical writing online?

Fundamental Examples

Colloquial catchy statements encoding serious mathematics

What are fixed points of the Fourier Transform

Can a mathematical definition be wrong?

What programming languages do mathematicians use?

What are some slogans that express mathematical tricks?

Suggestions for good notation

How to respond to "I was never much good at maths at school."

Fundamental Examples

What's your favorite equation, formula, identity or inequality?

Generalizing a problem to make it easier

Examples of using physical intuition to solve math problems

A single paper everyone should read?

Bizarre operation on polynomials

Cures for mathematician's block (as in writer's block)

Do convolution and multiplication satisfy any nontrivial algebraic identities?

Why is it so cool to square numbers (in terms of finding the standard deviation)?

Fundamental Examples

Finding minimal or canonical expressions for Boolean truth tables

The application of Lanczos Algorithm on sparse matrix

cardinal equivalence: for each boolean formula, |quantifications| = |assignments|.

Reporting all faces in a planar graph