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arxiv: 1407.5138 · v3 · submitted 2014-07-19 · 🧮 math.CO

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A relaxation of the Bordeaux Conjecture

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classification 🧮 math.CO
keywords everycolorableconjecturecyclesgraphintersectingplanartriangles
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A $(c_1,c_2,...,c_k)$-coloring of $G$ is a mapping $\varphi:V(G)\mapsto\{1,2,...,k\}$ such that for every $i,1 \leq i \leq k$, $G[V_i]$ has maximum degree at most $c_i$, where $G[V_i]$ denotes the subgraph induced by the vertices colored $i$. Borodin and Raspaud conjecture that every planar graph without intersecting triangles and $5$-cycles is $3$-colorable. We prove in this paper that every planar graph without intersecting triangles and $5$-cycles is (2,0,0)-colorable.

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