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Edge choosability of planar graphs without short cycles
Authors:Email author" target="_blank">Weifan?WangEmail author
Institution:School of Mathematics and Physics, Zhejiang Normal University, Jinhua 321004, China
Abstract:In this paper we prove that ifG is a planar graph with Δ = 5 and without 4-cycles or 6-cycles, thenG is edge-6-choosable. This consequence together with known results show that, for each fixedk Є {3,4,5,6}, ak-cycle-free planar graphG is edge-(Δ + 1)-choosable, where Δ denotes the maximum degree ofG.
Keywords:planar graph  coloring  choosability  cycle  
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