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The Erdős-Hajnal Conjecture for Paths and Antipaths (1303.5205v3)
Published 21 Mar 2013 in math.CO and cs.DM
Abstract: We prove that for every k, there exists $c_k>0$ such that every graph G on n vertices not inducing a path $P_k$ and its complement contains a clique or a stable set of size $n{c_k}$.