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A random coloring process gives improved bounds for the Erdős-Gyárfás problem on generalized Ramsey numbers
Journal article   Open access   Peer reviewed

A random coloring process gives improved bounds for the Erdős-Gyárfás problem on generalized Ramsey numbers

Patrick Bennett, Andrzej Dudek and Sean English
The Electronic journal of combinatorics, v 32(2), 219
01 Apr 2025
url
https://doi.org/10.37236/12237View
Published, Version of Record (VoR) Open

Abstract

Mathematics, Applied Science & Technology Mathematics Physical Sciences
The Erd & odblac;s-Gy & aacute;rf & aacute;s number f(n, p, q) is the smallest number of colors needed to color the edges of the complete graph Kn so that all of its p-clique spans at least q colors. In this paper we improve the best known upper bound on f(n, p, q) for many fixed values of p, q and large n. Our proof uses a randomized coloring process, which we analyze using the so-called differential equation method to establish dynamic concentration.

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