Dense Eulerian graphs are (1,3)(1, 3)-choosable

preprint2021arXivOpen access

Abstract

A graph GG is total weight (k,k′)(k,k')-choosable if for any total list assignment LL which assigns to each vertex vv a set L(v)L(v) of kk real numbers, and each edge ee a set L(e)L(e) of k′k' real numbers, there is a proper total LL-weighting, i.e., a mapping f:V(G)∪E(G)→Rf: V(G) \cup E(G) \to \mathbb{R} such that for each z∈V(G)∪E(G)z \in V(G) \cup E(G), f(z)∈L(z)f(z) \in L(z), and for each edge uvuv of GG, ∑e∈E(u)f(e)+f(u)≠∑e∈E(v)f(e)+f(v)\sum_{e \in E(u)}f(e)+f(u) \ne \sum_{e \in E(v)}f(e) + f(v). This paper proves that if GG decomposes into complete graphs of odd order, then GG is total weight (1,3)(1,3)-choosable. As a consequence, every Eulerian graph GG of large order and with minimum degree at least 0.91∣V(G)∣0.91|V(G)| is total weight (1,3)(1,3)-choosable. We also prove that any graph GG with minimum degree at least 0.999∣V(G)∣0.999|V(G)| is total weight (1,4)(1,4)-choosable.

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