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19
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26
Examples where it's useful to know that a mathematical object belongs to some family of objects
Sep 2 '11 at 1:36
13
Fundamental problems whose solution seems completely out of reach
Jul 2 '12 at 4:55
10
Why study simplicial homotopy groups?
Nov 10 '11 at 15:27
8
When and where did the term “module” enter commutative algebra?
Oct 5 '11 at 22:01
6
Why is the the classifying space of the natural numbers homotopy equivalent to the circle?
Apr 14 '12 at 6:48
5
The concept of Duality
Aug 29 '11 at 1:05
4
Are integers real?
Jan 28 '13 at 9:26
4
Expressing Galois actions on fundamental groups explicitly
Jul 24 '11 at 23:36
4
Best online mathematics videos?
Jul 20 '11 at 4:51
4
Can skeleta simplify category theory?
May 26 '11 at 20:11
3
What is the best way to study Rational Homotopy Theory
Jul 20 '11 at 4:38
2
Does each “prod-simplicial” regular cell complex come from a unique rooted tree?
Nov 16 '12 at 7:24
2
Does pi contain 1000 consecutive zeroes (in base 10)?
Sep 18 '12 at 16:28
2
Are there examples of non-orientable manifolds in nature?
Feb 13 '12 at 20:27
2
Classifying space of large category?
Apr 6 '11 at 4:36
1
Classes of metric spaces with additional structure
May 11 '11 at 6:13
0
Examples of Simplicial Groupoids in Nature
Dec 26 '11 at 8:07
0
The main theorems of category theory and their applications
Dec 16 '11 at 4:26
0
Geometric intuition for limits
Nov 10 '11 at 0:19
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