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An Alternative Proof of the Linearity of the Size-Ramsey Number of Paths

Published online by Cambridge University Press:  02 October 2014

ANDRZEJ DUDEK  and
PAWEŁ PRAŁAT
ANDRZEJ DUDEK
Affiliation:
Department of Mathematics, Western Michigan University, Kalamazoo, MI 49008-5248, USA (e-mail: andrzej.dudek@wmich.edu)
PAWEŁ PRAŁAT
Affiliation:
Department of Mathematics, Ryerson University, Toronto, ON, M5B 2K3, Canada (e-mail: pralat@ryerson.ca)
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Abstract

The size-Ramsey number $\^{r} $(F) of a graph F is the smallest integer m such that there exists a graph G on m edges with the property that every colouring of the edges of G with two colours yields a monochromatic copy of F. In 1983, Beck provided a beautiful argument that shows that $\^{r} $(Pn) is linear, solving a problem of Erdős. In this note, we provide another proof of this fact that actually gives a better bound, namely, $\^{r} $(Pn) < 137n for n sufficiently large.

Keywords

Primary 05D10Secondary 05C55
Type
Paper
Information
Combinatorics, Probability and Computing , Volume 24 , Issue 3 , May 2015 , pp. 551 - 555
Copyright
Copyright © Cambridge University Press 2014 

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