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75
Why is the Gamma function shifted from the factorial by 1?
Apr 10 '10 at 22:45
70
Famous vacuously true statements
Aug 1 '13 at 23:11
37
Why do roots of polynomials tend to have absolute value close to 1?
Oct 5 '14 at 18:40
34
When should you, and should you not, share your mathematical ideas?
Oct 27 '10 at 3:52
23
A quadratic form represents all primes except for the primes 2 and 11.
Feb 19 '12 at 9:07
23
How do you pronounce “Hartshorne”?
Apr 4 '10 at 5:00
22
Pair of curves joining opposite corners of a square must intersect---proof?
Aug 13 '10 at 18:27
20
Is Li(x) the best possible approximation to the prime-counting function?
Jul 4 '10 at 16:10
19
What is the lower bound for highly composite numbers?
Oct 21 '10 at 22:17
19
What's your favorite equation, formula, identity or inequality?
Mar 4 '10 at 22:03
17
Does the formal power series solution to $f(f(x))= \sin( x) $ converge?
Nov 20 '10 at 19:42
17
Integers represented by the polynomial $a^2+b^3+c^6$
Dec 2 '12 at 21:29
17
Heuristically false conjectures
Jan 17 '10 at 2:12
16
Is there a simple way to compute the number of ways to write a positive integer as the sum of three squares?
Apr 26 '10 at 22:36
14
Is there a straightedge and compass construction of incommensurables in the hyperbolic plane?
Sep 2 '14 at 19:33
14
How do you present a non-existence theorem?
Oct 27 '11 at 20:41
14
Is there a compass and straightedge construction of parallel lines in hyperbolic geometry?
Oct 25 '10 at 18:43
13
Collection of equivalent forms of Riemann Hypothesis
Aug 22 '12 at 4:37
13
Segments of Voronoi Diagrams on smooth manifolds. Are they geodesics?
May 21 '12 at 3:54
13
Primes of the form $x^2+ny^2$ and congruences.
Oct 28 '11 at 2:16
13
Torus minimizer of Willmore energy
Mar 20 '11 at 0:14
13
Who is the Youngster in the Automorphic Room?
Jun 16 '10 at 5:24
13
Numbers characterized by extremal properties
Apr 26 '10 at 2:57
12
Primes and $x^2+2y^2+4z^2$
Jun 26 '12 at 19:15
12
Means of Promoting Mathematics in Young Countries!
Oct 13 '11 at 23:12
12
Matrix expression for elements of $SO(3)$
Jul 12 '11 at 18:24
12
a^b = b^a when a is not equal to b.
Apr 22 '10 at 19:01
11
least prime in a arithmetic progression
Nov 14 '11 at 5:11
11
Primes of the form $x^2+ny^2+mz^2$ and congruences.
Nov 16 '11 at 21:15
11
Why the quarter in the $\frac{1}{4}$-pinched sphere theorem?
Oct 8 '11 at 2:07
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