paper

On degree anti-Ramsey numbers

arXiv:1507.07381 · doi:10.1016/j.ejc.2016.09.002

Abstract

The degree anti-Ramsey number of a graph is the smallest integer for which there exists a graph with maximum degree at most such that any proper edge colouring of yields a rainbow copy of . In this paper we prove a general upper bound on degree anti-Ramsey numbers, determine the precise value of the degree anti-Ramsey number of any forest, and prove an upper bound on the degree anti-Ramsey numbers of cycles of any length which is best possible up to a multiplicative factor of . Our proofs involve a variety of tools, including a classical result of Bollobás concerning cross intersecting families and a topological version of Hall's Theorem due to Aharoni, Berger and Meshulam.

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