Question

Existence of a nilpotent subgroup $N \leq G$ of step $\leq n$ such that a finite $A$ is in $K^{O_n(1)}$ left cosets of $N$

score 28 · Answer 1 · 2019-04-11 20:27:50

28

Views

Existence of a nilpotent subgroup $N \leq G$ of step $\leq n$ such that a finite $A$ is in $K^{O_n(1)}$ left cosets of $N$

Published on 11 Apr 2019 - 20:27

score 97 · Answer 2 · 2019-04-16 00:26:11

97

Views

Rewriting a set of integers to get rid of repetition but keeping subset sum ordering

Published on 16 Apr 2019 - 0:26

score 120 · Answer 3 · 2019-04-16 11:44:03

120

Views

What is the probability that $\exists N \in \mathbb{N}$ such that $\forall n > N$, $2n \in C + C$?

Published on 16 Apr 2019 - 11:44

score 53 · Answer 4 · 2019-05-12 10:26:52

53

Views

Does there exist such a non-trivial semigroup $S$ ($|S| > 1$), that $S \cong Add(S)$?

Published on 12 May 2019 - 10:26

score 3.7k · Answer 5 · 2019-07-09 19:17:21

3.7k

Views

Prove that $Sup(A + B) = Sup(A) + Sup(B)$

Published on 09 Jul 2019 - 19:17

score 194 · Answer 6 · 2019-07-10 02:02:00

194

Views

Following up with a previous question on $\sup(A)+\sup(B) = \sup(A + B)$

Published on 10 Jul 2019 - 2:02

score 122 · Answer 7 · 2019-07-20 12:52:57

122

Views

Minimum number of integers $a_1,....,a_m$ needed to express $2,...,n$ as $a_i + a_j$

Published on 20 Jul 2019 - 12:52

score 94 · Answer 8 · 2019-09-27 12:02:03

94

Views

How small can "spanning sumsets" of $[n]$ be?

Published on 27 Sep 2019 - 12:02

score 1.1k · Answer 9 · 2014-08-07 11:27:06

1.1k

Views

How do we know that $\mathbb{Z} + \sqrt{2}\mathbb{Z}$ isn't closed?

Published on 07 Aug 2014 - 11:27

score 473 · Answer 10 · 2014-12-23 22:17:51

473

Views

Showing the sum of two sets contains an interval - Baire's Theorem?

Published on 23 Dec 2014 - 22:17

score 103 · Answer 11 · 2019-11-11 10:52:21

103

Views

Maximal size of bounded “sparse” sets of natural numbers

Published on 11 Nov 2019 - 10:52

score 131 · Answer 12 · 2019-11-17 04:47:52

131

Views

Sidon sets in finite groups

Published on 17 Nov 2019 - 4:47

score 181 · Answer 13 · 2019-12-14 05:34:47

181

Views

Two uncountable subsets of real numbers without any interval and two relations

Published on 14 Dec 2019 - 5:34

score 215 · Answer 14 · 2020-01-26 23:42:14

215

Views

Sum-free sets in finite groups

Published on 26 Jan 2020 - 23:42

score 114 · Answer 15 · 2020-02-21 00:01:02

114

Views

Set $A$ with $|2A| \geq 100|A|$ but $|3A| < 1000|A|$

Published on 21 Feb 2020 - 0:01

List Question

Existence of a nilpotent subgroup $N \leq G$ of step $\leq n$ such that a finite $A$ is in $K^{O_n(1)}$ left cosets of $N$

Rewriting a set of integers to get rid of repetition but keeping subset sum ordering

What is the probability that $\exists N \in \mathbb{N}$ such that $\forall n > N$, $2n \in C + C$?

Does there exist such a non-trivial semigroup $S$ ($|S| > 1$), that $S \cong Add(S)$?

Prove that $Sup(A + B) = Sup(A) + Sup(B)$

Following up with a previous question on $\sup(A)+\sup(B) = \sup(A + B)$

Minimum number of integers $a_1,....,a_m$ needed to express $2,...,n$ as $a_i + a_j$

How small can "spanning sumsets" of $[n]$ be?

How do we know that $\mathbb{Z} + \sqrt{2}\mathbb{Z}$ isn't closed?

Showing the sum of two sets contains an interval - Baire's Theorem?

Maximal size of bounded “sparse” sets of natural numbers

Sidon sets in finite groups

Two uncountable subsets of real numbers without any interval and two relations

Sum-free sets in finite groups

Set $A$ with $|2A| \geq 100|A|$ but $|3A| < 1000|A|$

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