关于范畴积图的独立集、最终范畴独立比和最终范畴独立控制比的结果
Results on independent sets in categorical products of graphs, the ultimate categorical independence ratio and the ultimate categorical independent domination ratio
摘要：
我们表明，有多项式时间的算法来计算最大独立集的两个cographs和两个splitgraphs的分类产品。图G的最终分类独立比定义为lim_{k --> infty} α（G^k）/n^k.对于上图、置换图、区间图、有界树宽图和分裂图，最终的分类独立比是多项式的。当G是最大度为3的平面图时，α（G \times K_4）是NP-完全的.本文给出了平面图的最终范畴独立比的PTAS。我们提出了一个O^*（n^{n/3}）精确的指数算法。我们证明了完全多部图的最终分类独立控制比为零，除了当图是完全二部图且色类大小相等时（在这种情况下，它是1/2）。
英文摘要：
We show that there are polynomial-time algorithms to compute maximum independent sets in the categorical products of two cographs and two splitgraphs. The ultimate categorical independence ratio of a graph G is defined as lim_{k --> infty} α(G^k)/n^k. The ultimate categorical independence ratio is polynomial for cographs, permutation graphs, interval graphs, graphs of bounded treewidth and splitgraphs. When G is a planar graph of maximal degree three then alpha(G \times K_4) is NP-complete. We present a PTAS for the ultimate categorical independence ratio of planar graphs. We present an O^*(n^{n/3}) exact, exponential algorithm for general graphs. We prove that the ultimate categorical independent domination ratio for complete multipartite graphs is zero, except when the graph is complete bipartite with color classes of equal size (in which case it is 1/2).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
