首页 | 本学科首页   官方微博 | 高级检索  
     


Coloring graphs of various maximum degree from random lists
Abstract:Let G = G(n) be a graph on n vertices with maximum degree Δ =Δ (n). Assign to each vertex v of G a list L(v) of colors by choosing each list independently and uniformly at random from all k‐subsets of a color set urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0001 of size urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0002. Such a list assignment is called a random urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0003‐list assignment. In this paper, we are interested in determining the asymptotic probability (as n) of the existence of a proper coloring φ of G, such that urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0004 for every vertex v of G, a so‐called L‐coloring. We give various lower bounds on σ, in terms of n, k, and Δ, which ensures that with probability tending to 1 as n there is an L‐coloring of G. In particular, we show, for all fixed k and growing n, that if urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0005 and urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0006, then the probability that G has an L‐coloring tends to 1 as urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0007. If urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0008 and urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0009, then the same conclusion holds provided that urn:x-wiley:10429832:media:rsa20725:rsa20725-math-0010. We also give related results for other bounds on Δ, when k is constant or a strictly increasing function of n.
Keywords:coloring from random lists  list coloring  random list
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号