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81
Suggestions for good notation
Oct 20 '10 at 20:19
54
German mathematical terms like “Nullstellensatz”
Apr 19 '11 at 12:04
45
A topologist is not a mathematician - a small question
Aug 8 '14 at 13:26
34
Need help proving that $\sum\limits_{j=0}^{k-1}(-1)^{j+1}(k-j)^{2k-2} \binom{2k+1}{j} \ge 0$
Jun 23 '10 at 0:27
29
Why do we teach calculus students the derivative as a limit?
Sep 27 '10 at 12:10
28
For which maps $S^1\to S^1$ is the winding number defined?
Apr 12 '14 at 7:27
27
What is your favorite proof of Tychonoff's Theorem?
May 30 '10 at 7:25
25
Did ancient mathematicians know Euler's characteristic for convex polyhedra?
Jan 14 '14 at 19:28
25
Are there such numbers?
Nov 22 '12 at 10:44
23
Making N (set of all positive integers) a group
May 23 '10 at 22:24
23
Square of a continuous map
Mar 24 '12 at 6:38
21
Geometric proof of the Vandermonde determinant?
Jun 24 '10 at 0:00
21
A Hölder continuous function which does not belong to any Sobolev space
Sep 15 '10 at 8:06
21
Asymptotic approximation of $x^\alpha$ by entire functions
May 28 '10 at 17:45
20
Noncombinatorial proofs of Ramsey's Theorem?
Jun 24 '10 at 22:05
20
What if Current Foundations of Mathematics are Inconsistent?
Oct 3 '10 at 19:09
19
Solving a non linear equation
Sep 14 '14 at 23:08
19
How do professional mathematicians learn new things?
Aug 2 '10 at 7:21
18
What is the most useful non-existing object of your field?
Sep 29 '14 at 7:47
18
The vector field of a given flow
Sep 24 '10 at 23:31
17
Are these rings of functions isomorphic?
Sep 12 '13 at 14:38
17
How to compute \prod_{n=1}^{\infty} (1-p^{-n})
Aug 14 '12 at 20:07
16
Compact Embeddings of Sobolev Spaces: A Counterexample Showing The Rellich-Kondrachov Theorem Is Sharp
Nov 16 '11 at 7:24
16
is f a polynomial provided that it is “partially” smooth?
Apr 15 '12 at 22:06
15
Convergent subsequence of $\sin n$
Aug 8 '13 at 21:55
15
Examples of common false beliefs in mathematics
May 17 '10 at 9:58
14
Why is the Gamma function shifted from the factorial by 1?
May 26 '10 at 7:23
14
Pythagorean 5-tuples
Apr 24 '11 at 11:42
14
ODE's without a Lipschitz condition
Dec 5 '12 at 18:55
14
Explicit Hamel basis of real numbers
Nov 14 '10 at 19:50
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