English

A Mathon-type construction for digraphs and improved lower bounds for Ramsey numbers

Combinatorics 2024-08-13 v2

Abstract

We construct an edge-colored digraph analogous to Mathon's construction for undirected graphs. We show that this graph is connected to the kk-th power Paley digraphs and we use this connection to produce improved lower bounds for multicolor directed Ramsey numbers.

Keywords

Cite

@article{arxiv.2408.04067,
  title  = {A Mathon-type construction for digraphs and improved lower bounds for Ramsey numbers},
  author = {Dermot McCarthy and Chris Monico},
  journal= {arXiv preprint arXiv:2408.04067},
  year   = {2024}
}

Comments

Corrected typo from V1

R2 v1 2026-06-28T18:07:02.840Z