User Sean Tilson

36 votes

Colloquial catchy statements encoding serious mathematics

answered Feb 6, 2011 at 5:30

29 votes

How to introduce notions of flat, projective and free modules?

answered Nov 18, 2010 at 21:57

28 votes

Mathematical "urban legends"

answered Jan 25, 2011 at 5:52

17 votes

The whole plethora of topology

answered Mar 14, 2011 at 16:31

13 votes

'Important' applications of p-adic numbers outside of algebra (and number theory).

answered Dec 26, 2011 at 22:07

11 votes

Examples of math hoaxes/interesting jokes published on April Fool's day?

answered Apr 1, 2016 at 15:05

11 votes

Accepted

Examples of computing Ext and Tor functors?

answered Jul 6, 2010 at 3:26

10 votes

Is there a categorification of topological K-theory?

answered Aug 5, 2012 at 1:50

7 votes

Examples of theorems with proofs that have dramatically improved over time

answered Sep 24, 2015 at 11:57

6 votes

Reference request: Equivariant Topology

answered Jan 13, 2012 at 22:05

6 votes

Accepted

Categories of Geometry

answered Apr 6, 2010 at 0:24

6 votes

Characteristic classes in generalized cohomology theories?

answered Apr 19, 2010 at 4:57

6 votes

Does the category of topological symmetric spectra satisfy the monoid axiom ?

answered Nov 9, 2010 at 18:35

6 votes

references / general idea of kervaire invariant problem

answered Jul 26, 2010 at 5:31

5 votes

A reference for Calculus of Functors for Model Categories

answered Sep 16, 2010 at 2:36

5 votes

Why chain homotopy when there is no topology in the background?

answered Mar 25, 2011 at 2:42

5 votes

Describe a topic in one sentence.

answered Nov 27, 2010 at 23:58

5 votes

What out-of-print books would you like to see re-printed?

answered Mar 26, 2010 at 5:47

5 votes

Most helpful math resources on the web

answered Jul 12, 2010 at 0:32

5 votes

Formal Group Laws on Ring Spectra?

answered Dec 31, 2011 at 20:33

4 votes

Spectral Sequences reference

answered Mar 4, 2016 at 13:02

4 votes

Dyer-Lashof algebra and Steenrod algebra "duality"

answered Jun 20, 2017 at 11:12

4 votes

Computational complexity of computing homotopy groups of spheres

answered May 8, 2012 at 22:17

4 votes

Why should I prefer bundles to (surjective) submersions?

answered Aug 3, 2010 at 20:13

4 votes

Are the homology and cohomology Serre spectral sequences dual to each other?

answered Aug 7, 2010 at 16:54

4 votes

Are there Steenrod operations on Hochschild cohomology of the group algebra of a finite group?

answered Apr 6, 2011 at 12:34

3 votes

How to present mathematics to non-mathematicians?

answered Nov 25, 2010 at 0:12

3 votes

What are natural questions to ask about an operad?

answered Aug 26, 2010 at 4:29

3 votes

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

answered Mar 29, 2010 at 5:26

3 votes

Short Course Suggestions For High School Students

answered Dec 21, 2011 at 22:41

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50 Answers

Colloquial catchy statements encoding serious mathematics

How to introduce notions of flat, projective and free modules?

Mathematical "urban legends"

The whole plethora of topology

'Important' applications of p-adic numbers outside of algebra (and number theory).

Examples of math hoaxes/interesting jokes published on April Fool's day?

Examples of computing Ext and Tor functors?

Is there a categorification of topological K-theory?

Examples of theorems with proofs that have dramatically improved over time

Reference request: Equivariant Topology

Categories of Geometry

Characteristic classes in generalized cohomology theories?

Does the category of topological symmetric spectra satisfy the monoid axiom ?

references / general idea of kervaire invariant problem

A reference for Calculus of Functors for Model Categories

Why chain homotopy when there is no topology in the background?

Describe a topic in one sentence.

What out-of-print books would you like to see re-printed?

Most helpful math resources on the web

Formal Group Laws on Ring Spectra?

Spectral Sequences reference

Dyer-Lashof algebra and Steenrod algebra "duality"

Computational complexity of computing homotopy groups of spheres

Why should I prefer bundles to (surjective) submersions?

Are the homology and cohomology Serre spectral sequences dual to each other?

Are there Steenrod operations on Hochschild cohomology of the group algebra of a finite group?

How to present mathematics to non-mathematicians?

What are natural questions to ask about an operad?

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

Short Course Suggestions For High School Students