University of Calgary

Chromatic numbers and products


Let $f(n)$ be the smallest number so that there are two $n$ chromatic graphs whose product has chromatic number $f(n)$. Under the assumption that a certain sharper result than one obtained by Duffus, Sands and Woodrow \cite{DSW}, and Welzl \cite{W}, holds we will prove that $f(n)\geq {n/2}$.
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