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64
Answers
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96
Most memorable titles
Oct 31 '10 at 14:30
86
Slick proof?: A vector space has the same dimension as its dual if and only if it is finite dimensional
Jan 29 '10 at 12:45
43
Knuth's intuition that Goldbach might be unprovable
Jun 11 '10 at 0:50
25
Why do we care about the Hilbert scheme of points?
Sep 27 '10 at 16:04
25
Ways to prove the fundamental theorem of algebra
Jan 4 '10 at 14:57
22
What are your favorite instructional counterexamples?
Mar 2 '10 at 13:16
21
Collecting proofs that finite multiplicative subgroups of fields are cyclic.
Feb 8 '11 at 9:45
20
Interesting results in algebraic geometry accessible to 3rd year undergraduates
Apr 3 '10 at 20:26
19
What is the Cayley projective plane?
Nov 24 '09 at 10:23
18
Pedagogical question about linear algebra
May 27 '10 at 22:49
17
Examples of the moduli space of X giving facts about a certain X
May 27 '10 at 8:33
17
Integer points (very naive question)
Mar 19 '10 at 15:08
16
Is Hartshorne's definition of the category of varieties natural?
Jul 7 '10 at 16:48
15
When do divisors pull back?
Mar 16 '10 at 21:25
14
What are your favorite instructional counterexamples?
Mar 2 '10 at 13:21
13
Free, high quality mathematical writing online?
Feb 18 '10 at 13:34
13
Is a 'generic' variety nonsingular? Or singular?
Mar 7 '10 at 16:35
12
Is there a Whitney Embedding Theorem for non-smooth manifolds?
Aug 5 '10 at 17:28
12
If $f$ is infinitely differentiable then $f$ coincides with a polynomial
Aug 1 '10 at 1:55
12
Hodge Index theorem for Complex Manifolds
Jan 29 '10 at 0:51
11
Examples of common false beliefs in mathematics
May 4 '10 at 23:02
10
blowing up, -1 curves, effective and ample divisors
Mar 1 '10 at 23:37
9
The definition of homotopy in algebraic topology
Aug 11 '10 at 17:28
8
Why nilpotent elements must be allowed in modern algebraic geometry?
Feb 12 '11 at 23:58
8
Origins of names of algebraic structures
Aug 12 '10 at 1:29
8
K3 surface of genus 8
Feb 10 '10 at 14:54
8
What is the exact statement of “there are 27 lines on a cubic”?
Nov 25 '09 at 9:58
7
How to determine the homotopy groups of the suspension of a space?
Oct 23 '09 at 12:19
7
On proving that a certain set is not empty by proving that it is actually large
Aug 3 '10 at 15:28
7
Math puzzles for dinner
Jun 24 '10 at 8:06
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