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r-Hued coloring of planar graphs without short cycles

机译:没有短期循环的平面图的颜色

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摘要

A (k, r)-hued coloring of a graph G is a proper k-coloring phi such that vertical bar phi(N-G(v))vertical bar >= min{d(G)(v), r} for any vertex v. The r-hued chromatic number of G, written chi r (G), is the minimum integer k such that G has a (k, r)-hued coloring. In this paper, we show that chi r (G) <= r + 5 if r >= 13 and G is a planar graph without 3,4,8-cycles or if G is a planar graph without 4,5-cycles and no 3-cycle is intersect with i-cycles, i = {3, 6, 7}, then chi r (G) <= r + 5, where r >= 3.
机译:图G的(k,r)曲线图G是适当的K-着色PHI,使得垂直条PHI(NG(V))垂直条> = MIN {D(G)(V),R}对于任何顶点 v。G,写入CHI R(G)的R-SUED色谱数是最小整数k,使得G具有(k,r)-hued着色。 在本文中,我们表明Chi R(g)<= r + 5如果r> = 13和g是没有3,4,8-循环的平面图,或者如果g是平面图,则没有4,5-循环 没有3周期与I-循环相交,i = {3,6,7},然后是Chi R(g)<= r + 5,其中r> = 3。

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