User Dan Piponi

300 votes

Why is a topology made up of 'open' sets?

answered Mar 23, 2010 at 23:04

232 votes

Computer algebra errors

answered Jan 13, 2010 at 2:14

163 votes

Your favorite surprising connections in mathematics

answered Feb 8, 2010 at 1:34

98 votes

Papers that debunk common myths in the history of mathematics

answered May 31, 2010 at 22:03

92 votes

Accepted

Relating category theory to programming language theory

answered Nov 5, 2009 at 17:14

90 votes

Accepted

What is the exterior derivative intuitively?

answered Apr 11, 2010 at 19:28

78 votes

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

answered Jan 27, 2010 at 19:00

78 votes

Short exact sequences every mathematician should know

answered Jun 21, 2020 at 23:47

62 votes

Cool problems to impress students with group theory

answered Jan 30, 2010 at 1:54

48 votes

Which mathematicians have influenced you the most?

answered May 14, 2010 at 20:19

46 votes

What are the most overloaded words in mathematics?

answered Dec 22, 2009 at 22:36

45 votes

Mathematics as a hobby

answered May 11, 2010 at 22:48

42 votes

Why are modular forms interesting?

answered May 14, 2010 at 16:30

41 votes

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

answered Dec 13, 2013 at 23:45

40 votes

Rediscovery of lost mathematics

answered Jul 18, 2014 at 17:47

40 votes

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

answered Oct 29, 2009 at 22:06

38 votes

Mathematical applications of quantum field theory

answered Nov 25, 2016 at 19:53

35 votes

What are the most attractive Turing undecidable problems in mathematics?

answered Feb 19, 2010 at 0:08

33 votes

A book you would like to write

answered Feb 4, 2011 at 20:31

31 votes

What should be offered in undergraduate mathematics that's currently not (or isn't usually)?

answered May 20, 2010 at 0:53

27 votes

Fields of mathematics that were dormant for a long time until someone revitalized them

answered May 11, 2010 at 23:44

24 votes

Are 0 and 1, respectively, the least and most used digits among primes?

answered Aug 16, 2023 at 21:06

21 votes

What practical applications does set theory have?

answered Feb 15, 2011 at 15:34

20 votes

Theorems for nothing (and the proofs for free)

answered Nov 13, 2009 at 16:12

19 votes

"Philosophical" meaning of the Yoneda Lemma

answered Oct 29, 2009 at 22:04

19 votes

Accepted

cut elimination

answered Dec 12, 2009 at 1:09

19 votes

In what ways is physical intuition about mathematical objects non-rigorous?

answered Jun 12, 2010 at 18:05

19 votes

Books on music theory intended for mathematicians

answered Feb 27, 2017 at 0:08

18 votes

Different ways of thinking about the derivative

answered May 17, 2010 at 22:08

18 votes

Accepted

Does every ODE comes from something in physics?

answered Dec 9, 2009 at 23:54

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115 Answers

Why is a topology made up of 'open' sets?

Computer algebra errors

Your favorite surprising connections in mathematics

Papers that debunk common myths in the history of mathematics

Relating category theory to programming language theory

What is the exterior derivative intuitively?

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

Short exact sequences every mathematician should know

Cool problems to impress students with group theory

Which mathematicians have influenced you the most?

What are the most overloaded words in mathematics?

Mathematics as a hobby

Why are modular forms interesting?

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

Rediscovery of lost mathematics

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

Mathematical applications of quantum field theory

What are the most attractive Turing undecidable problems in mathematics?

A book you would like to write

What should be offered in undergraduate mathematics that's currently not (or isn't usually)?

Fields of mathematics that were dormant for a long time until someone revitalized them

Are 0 and 1, respectively, the least and most used digits among primes?

What practical applications does set theory have?

Theorems for nothing (and the proofs for free)

"Philosophical" meaning of the Yoneda Lemma

cut elimination

In what ways is physical intuition about mathematical objects non-rigorous?

Books on music theory intended for mathematicians

Different ways of thinking about the derivative

Does every ODE comes from something in physics?