Authors: Milićević, Luka 
Affiliations: Mathematical Institute of the Serbian Academy of Sciences and Arts 
Title: An improved upper bound for the grid Ramsey problem
Journal: Journal of Graph Theory
Volume: 94
Issue: 4
First page: 509
Last page: 517
Issue Date: 1-Jan-2020
Rank: M22
ISSN: 0364-9024
DOI: 10.1002/jgt.22540
Abstract: 
For a positive integer r, let G (r) be the smallest N such that, whenever the edges of the Cartesian product KN × KN are r-colored, then there is a rectangle in which both pairs of opposite edges receive the same color. In this paper, we improve the upper bounds on G (r) by proving (Formula presented.), for r large enough. Unlike the previous improvements, which were based on bounds for the size of set systems with restricted intersection sizes, our proof is a form of quasirandomness argument.
Keywords: graph Cartesian product | grid Ramsey problem | quasirandomness | Ramsey theory
Publisher: Wiley
Project: Representations of logical structures and formal languages and their application in computing 

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