Question

Finite structural Ramsey degrees

score 61 · Answer 1 · 2021-05-16 08:02:43

61

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Finite structural Ramsey degrees

Published on 16 May 2021 - 8:02

score 45 · Answer 2 · 2021-05-21 12:03:32

45

Views

Explicit partition of $\mathbb{N}$ to demonstrate that $\{x,y,3x-y\}$ is not a Ramsey family

Published on 21 May 2021 - 12:03

score 109 · Answer 3 · 2026-03-27 10:43:01

109

Views

Gallai partition

Published on 27 Mar 2026 - 10:43

score 169 · Answer 4 · 2026-03-27 13:48:26

169

Views

Find the smallest $n$ such that a two colouring $n$ edges of $K_9$ will always produce monochromatic triangle.

Published on 27 Mar 2026 - 13:48

score 101 · Answer 5 · 2021-07-14 09:50:39

101

Views

Largest independent sets in triangle free graphs-question about an equality

Published on 14 Jul 2021 - 9:50

score 149 · Answer 6 · 2021-07-15 14:23:00

149

Views

Property of points in the plane where distances are pairwise different. Existence of a pair which has min/max distance in different subsets.

Published on 15 Jul 2021 - 14:23

score 192 · Answer 7 · 2021-07-22 22:30:44

192

Views

Friends and stranger theorem: more than one group of three strangers or three friends?

Published on 22 Jul 2021 - 22:30

score 77 · Answer 8 · 2021-07-29 23:08:05

77

Views

Colouring multiple subgraphs so that each subgraph is either uncoloured or multicoloured

Published on 29 Jul 2021 - 23:08

score 87 · Answer 9 · 2021-08-21 02:00:40

87

Views

Shouldn't red and blue have some sort of symmetry?

Published on 21 Aug 2021 - 2:00

score 212 · Answer 10 · 2021-09-02 15:42:30

212

Views

Choice principles and Ramsey's theorem.

Published on 02 Sep 2021 - 15:42

score 88 · Answer 11 · 2021-09-06 13:41:09

88

Views

30 points in the plane 12 red segments and 17 blue segments from each point

Published on 06 Sep 2021 - 13:41

score 391 · Answer 12 · 2021-09-06 18:28:31

391

Views

Does a random set of points in the plane contain a large empty convex polygon?

Published on 06 Sep 2021 - 18:28

score 97 · Answer 13 · 2026-02-24 05:37:27

97

Views

Every $2$-colouring of the lattice points of $\mathbb R^m$ has $n$ monochromatic points whose centroid is a lattice point of the same colour

Published on 24 Feb 2026 - 5:37

score 81 · Answer 14 · 2021-09-18 15:26:26

81

Views

Tournament, Ramsey Number

Published on 18 Sep 2021 - 15:26

score 202 · Answer 15 · 2026-03-27 03:40:58

202

Views

Syndeticity- and thickness-preserving bijections of $\mathbb N$

Published on 27 Mar 2026 - 3:40

List Question

Finite structural Ramsey degrees

Explicit partition of $\mathbb{N}$ to demonstrate that $\{x,y,3x-y\}$ is not a Ramsey family

Gallai partition

Find the smallest $n$ such that a two colouring $n$ edges of $K_9$ will always produce monochromatic triangle.

Largest independent sets in triangle free graphs-question about an equality

Property of points in the plane where distances are pairwise different. Existence of a pair which has min/max distance in different subsets.

Friends and stranger theorem: more than one group of three strangers or three friends?

Colouring multiple subgraphs so that each subgraph is either uncoloured or multicoloured

Shouldn't red and blue have some sort of symmetry?

Choice principles and Ramsey's theorem.

30 points in the plane 12 red segments and 17 blue segments from each point

Does a random set of points in the plane contain a large empty convex polygon?

Every $2$-colouring of the lattice points of $\mathbb R^m$ has $n$ monochromatic points whose centroid is a lattice point of the same colour

Tournament, Ramsey Number

Syndeticity- and thickness-preserving bijections of $\mathbb N$

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