20

Answers
votes newest views recent
28
What should be offered in undergraduate mathematics that’s currently not (or isn’t usually)?
17
Is a subgroup of a free abelian group free abelian?
10
Circle bundles over $RP^2$
9
Rational Group Cohomology
9
What is the right way to think about / represent general tilings?
8
Algorithm generalizing continued fractions for non-quadratic algebraic numbers
8
What’s an example of a space that needs the Hahn-Banach Theorem?
6
Is there a simplicial volume definition of Chern Simons invariants?
6
What are CR manifolds like?
6
Dolbeault cohomology
6
Independence of the continuum hypothesis on ZFC
5
What’s a non-abelian totally ordered group?
5
When is a Riemannian metric equivalent to the flat metric on $\mathbb R^n$?
4
can you fool SnapPea?
3
Symmetrical Presentation of 4-Dimensional Rotation Matrix
3
Stable w-length
3
Why is the standard definition of cocycle the one that _always_ comes up??
3
Lie Groups and Manifolds
2
What is an example of a function on M_g?
2
Minimal surface in a ball