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Answers
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20
Number of vectors so that no two subset sums are equal
Feb 15 '14 at 13:44
15
Set of integers having finite intersection with the image of any polynomial of degree $\geq 2$
Feb 14 '15 at 21:08
15
How $a+b$ can grow when $a!b! \mid n!$
Jul 27 '13 at 15:11
14
Examples of eventual counterexamples
May 20 '11 at 6:37
13
When does $P(a−b)=0$ for $a≠b$ ensure $P(0)=0$? (Continued.)
May 17 at 7:04
13
Does small Perron-Frobenius eigenvalue imply small entries for integral matrices?
May 9 '14 at 8:23
13
Consecutive non-quadratic residues
Mar 24 '14 at 18:25
13
More open problems
Dec 8 '10 at 12:12
12
Paths in groups
May 16 '14 at 5:09
12
Sums of powers mod p
Apr 1 '12 at 18:43
11
List of integers without any arithmetic progression of n terms
Sep 24 '14 at 9:19
11
Can you cover the Boolean cube {0,1}^n with O(1) Hamming-balls each of radius n/2-c*sqrt(n)?
Jul 16 '12 at 10:21
11
Randomly contracting edges of a graph - expected number of vertices?
Jul 10 '11 at 19:56
11
How to recognise that the polynomial method might work
Oct 25 '10 at 15:44
10
Lower bound for exponential sums.
Dec 24 '12 at 8:15
10
Is the norm of a $0-1$ matrix (almost) attained on a $0-1$ vector?
Apr 29 '11 at 14:19
9
The Second Moment of a Sum of Floor Functions
Apr 22 '12 at 15:50
8
Freiman-isomorphic sets
Dec 10 '15 at 18:27
8
A question regarding simultaneous congruences
Apr 9 '12 at 17:19
7
Ordering subsets of the cyclic group to give distinct partial sums
Apr 16 '15 at 18:21
7
A problem related with 'Postage stamp problem'
Nov 10 '13 at 18:03
7
Minimum cardinality of a difference set in $R^n$
Sep 20 '11 at 7:23
7
How large can a non-sumset be?
Feb 13 '11 at 12:06
6
Minimal “sumset basis” in the discrete linear space $\mathbb F_2^n$
May 22 '15 at 11:27
6
Element with unique representation in A+B
Apr 2 '15 at 15:07
6
The maximal “nearly convex” function
Nov 26 '13 at 9:11
6
Additive set with small sum set and large difference set
Oct 13 '12 at 11:05
6
Number of integers coprime to l
May 30 '12 at 10:31
6
Spectral radius of a proper subgraph
Jul 9 '11 at 6:14
5
Relationship between quadratic residues modulo a prime and quadratic residues modulo a prime power
Nov 12 '15 at 18:36
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