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String graphs have the Erd\H{o}s-Hajnal property

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arxiv 2002.10350 v1 pith:CX3P4LZN submitted 2020-02-24 math.CO

classification math.CO
keywords graphstringabsolutecliqueconstantcontainscurveseither
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abstract

A string graph is the intersection graph of curves in the plane. We prove that there exists an absolute constant $c>0$ such that if $G$ is a string graph on $n$ vertices, then $G$ contains either a clique or an independent set of size at least $n^{c}$.

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