User David Corwin - MathOverflow

David Corwin

Member for 14 years, 6 months
Last seen more than a month ago

math.bgu.ac.il/~corwind
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67 Answers

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66 votes

Your favorite surprising connections in mathematics

answered Jul 15, 2010 at 15:59

51 votes

What are the most misleading alternate definitions in taught mathematics?

answered Jul 15, 2010 at 19:40

40 votes

What are your favorite instructional counterexamples?

answered Jul 9, 2012 at 22:13

24 votes

New grand projects in contemporary math

answered Dec 30, 2012 at 21:57

20 votes

How were moduli spaces defined before functors?

answered Nov 15, 2012 at 15:09

20 votes

Accepted

Points in sites (etale, fppf, ... )

answered Dec 30, 2012 at 9:33

20 votes

Galois groups vs. fundamental groups

answered Nov 1, 2009 at 17:44

18 votes

Why is the Leibniz rule a definition for derivations?

answered Dec 28, 2012 at 1:39

17 votes

Blackbox Theorems

answered Jun 26, 2012 at 19:33

16 votes

Undergraduate roadmap to algebraic geometry?

answered Aug 11, 2010 at 23:17

15 votes

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

answered Jul 15, 2010 at 16:03

12 votes

What is the definition of "canonical"?

answered Jun 4, 2012 at 20:28

12 votes

Conway's lesser-known results

answered Apr 14, 2020 at 17:20

11 votes

Suggestions for good books on class field theory

answered Aug 19, 2010 at 0:17

9 votes

Explicit computations using the Haar measure

answered Aug 24, 2010 at 0:08

9 votes

How should one present curl and divergence in an undergraduate multivariable calculus class?

answered Jul 14, 2010 at 0:29

9 votes

Are there other nice math books close to the style of Tristan Needham?

answered Jul 15, 2010 at 9:52

9 votes

Fiction books about mathematicians?

answered Aug 28, 2012 at 6:31

8 votes

Trichotomies in mathematics

answered Feb 4, 2013 at 10:13

8 votes

Fundamental Examples

answered Jul 7, 2010 at 22:38

8 votes

Intuition for Group Cohomology

answered Jul 28, 2010 at 12:46

7 votes

Old books still used

answered Dec 30, 2012 at 5:35

7 votes

Teaching homology via everyday examples

answered Jan 2, 2014 at 23:03

7 votes

Accepted

Algebraic Geometry for non-mathematician

answered Apr 9, 2014 at 21:22

7 votes

Errata for Atiyah–Macdonald

answered Aug 29, 2012 at 9:32

7 votes

Anabelian geometry study materials?

answered Oct 5, 2012 at 14:07

6 votes

Textbook for Etale Cohomology

answered Sep 25, 2012 at 14:10

6 votes

Fundamental Examples

answered Jul 7, 2010 at 22:28

6 votes

What is the Implicit Function Theorem good for?

answered Sep 7, 2010 at 6:13

6 votes

Sums of uncountably many real numbers

answered May 10, 2011 at 18:38

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