List questions from additive-combinatorics

Published on 25 Mar 2026 - 12:37

174

Views

Determine the structure of all finite sets $A$ of integers such that $|A| = k$ and $|2A| = 2k + 1$.

Published on 11 Apr 2026 - 15:12

2.1k

Views

A Nice Problem In Additive Number Theory

Published on 11 May 2026 - 3:12

371

Views

If an infinite set $S$ of positive integers is equidistributed, is $S+S$ also equidistributed?

Published on 11 Apr 2026 - 11:14

600

Views

The size of sets of positive integers not having distinct subsets with equal size and sum

Published on 25 Mar 2026 - 16:39

120

Views

Bounds for the Fourier transform of characteristic functions on $\mathbb{Z}/N\mathbb{Z}$ supported on large sets

Published on 25 Mar 2026 - 21:17

1.2k

Views

Use Pigeonhole to show of any set of $2^{n+1}-1$ positive integers is possible choose $2^{n}$ elements such that their sum is divisible by $2^{n}$.

Published on 26 Mar 2026 - 5:41

172

Views

A Combinatorics Problem with x+y = z

Published on 26 Mar 2026 - 6:21

106

Views

Combinatorics Proof Suggestions and Feedback

Published on 26 Mar 2026 - 5:04

36

Views

An inequality for sumsets

Published on 11 Apr 2026 - 9:07

54

Views

Subset of $\mathbb{Z}_n$ and zero sum

Published on 26 Mar 2026 - 3:01

198

Views

Additive energy of a set and an arithmetic progression

Published on 25 Mar 2026 - 17:22

29

Views

Bounds for the moments of complex geometric sums

Published on 26 Mar 2026 - 9:22

167

Views

An analogue of direct sum decomposition of a cofinite subset of integers

Published on 26 Mar 2026 - 3:28

358

Views

Olympiad style problem about sets.

Published on 25 Mar 2026 - 12:30

List Question

$4$ vectors in $\mathbb{Z_4}^9$that sum to $0$.

Determine the structure of all finite sets $A$ of integers such that $|A| = k$ and $|2A| = 2k + 1$.

A Nice Problem In Additive Number Theory

If an infinite set $S$ of positive integers is equidistributed, is $S+S$ also equidistributed?

The size of sets of positive integers not having distinct subsets with equal size and sum

Bounds for the Fourier transform of characteristic functions on $\mathbb{Z}/N\mathbb{Z}$ supported on large sets

Use Pigeonhole to show of any set of $2^{n+1}-1$ positive integers is possible choose $2^{n}$ elements such that their sum is divisible by $2^{n}$.

A Combinatorics Problem with x+y = z

Combinatorics Proof Suggestions and Feedback

An inequality for sumsets

Subset of $\mathbb{Z}_n$ and zero sum

Additive energy of a set and an arithmetic progression

Bounds for the moments of complex geometric sums

An analogue of direct sum decomposition of a cofinite subset of integers

Olympiad style problem about sets.

Trending Questions

Popular # Hahtags

Popular Questions