15

Answers
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12
Sum of odd numbers results in a square number
8
Integer points of an elliptic curve
7
Why is the gradient normal?
5
the hopf invariant of the hopf construction
5
Titles composed entirely of math symbols
4
Gaussian curvature of a z=f(x,y) function
4
Least number of charts to describe a given manifold
3
Non-Lie Subgroups
3
Proofs without words
3
A walk on a compact 2D surface embedded in 3-space that never returns home
1
How can I show that the map L-->K(\pi_n(L),n) representing the fundamental class of an (n-1)-connected space is an isomorphism on \pi_n?
1
Can topologies induce a metric?
1
Closed form solution to x^(x+1)=(x+1)^x
0
Grid with nice mathematical properties
0
Given a sequence defined on the positive integers, how should it be extended to be defined at zero?