Emergent Mind
Reconfiguring colorings of graphs with bounded maximum average degree
(1904.12698)
Published Apr 29, 2019
in
math.CO
and
cs.DM
Abstract
The reconfiguration graph $Rk(G)$ for the $k$-colorings of a graph $G$ has as vertex set the set of all possible $k$-colorings of $G$ and two colorings are adjacent if they differ in the color of exactly one vertex of $G$. Let $d, k \geq 1$ be integers such that $k \geq d+1$. We prove that for every $\epsilon > 0$ and every graph $G$ with $n$ vertices and maximum average degree $d - \epsilon$, $Rk(G)$ has diameter $O(n(\log n){d - 1})$. This significantly strengthens several existing results.
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