302

Answers
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53
Which mathematical ideas have done most to change history? (2)
45
Depressed graduate student.
32
Geometric interpretation of characteristic polynomial
29
Can every manifold be given an analytic structure?
26
What manifolds are bounded by RP^odd?
26
What are the most misleading alternate definitions in taught mathematics?
26
The half-life of a theorem, or Arnold’s principle at work
25
What are “good” examples of spin manifolds?
25
Can we decompose Diff(MxN)?
22
Theoretical physics: Why not just R^4?
22
Applications of knot theory (2)
20
Square roots of $\mathbb R^{2n}$
20
Your favorite surprising connections in Mathematics
20
Why is it useful to classify the vector bundles of a space? (2)
19
Why should I prefer bundles to (surjective) submersions?
19
Classification problem for non-compact manifolds
18
Is the universal covering of an open subset of $\mathbb{R}^n$ diffeomorphic to an open subset of $\mathbb{R}^n$ ?
18
Examples of non-diffeomorphic smooth manifolds with diffeomorphic tangent bundle
18
What are natural questions to ask about an operad?
18
Homotopy Groups of Connected Sums
18
What manifolds are boundaries of euclidian spaces ?
16
Is anything known about this braid group quotient?
16
Can infinity shorten proofs a lot?
15
Why do so many textbooks have so much technical detail and so little enlightenment?
15
F→E→B bundle with B,E,F hyperbolic: possible?
15
Why are operads useful?
15
Irreducible homology 3-spheres that bound smooth contractible manifolds
14
Topological spaces made by identifying opposite faces of a cube?
14
Pseudoisotopy in low dimensions
14
Is there a 2 component link with full symmetry?
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