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On the Maximum Weight Independent Set Problem in graphs without induced cycles of length at least five
arXiv - CS - Data Structures and Algorithms Pub Date : 2019-03-12 , DOI: arxiv-1903.04761
Maria Chudnovsky, Marcin Pilipczuk, Micha{\l} Pilipczuk, and St\'ephan Thomass\'e

A hole in a graph is an induced cycle of length at least $4$, and an antihole is the complement of an induced cycle of length at least $4$. A hole or antihole is long if its length is at least $5$. For an integer $k$, the $k$-prism is the graph consisting of two cliques of size $k$ joined by a matching. The complexity of Maximum (Weight) Independent Set (MWIS) in long-hole-free graphs remains an important open problem. In this paper we give a polynomial time algorithm to solve MWIS in long-hole-free graphs with no $k$-prism (for any fixed integer $k$), and a subexponential algorithm for MWIS in long-hole-free graphs in general. As a special case this gives a polynomial time algorithm to find a maximum weight clique in perfect graphs with no long antihole, and no hole of length $6$. The algorithms use the framework of minimal chordal completions and potential maximal cliques.

中文翻译:

关于长度至少为 5 的诱导循环图中的最大权重独立集问题

图中的洞是长度至少为 $4$ 的诱导圈,反洞是长度至少为 $4$ 的诱导圈的补充。如果孔或反孔的长度至少为 5 美元,则该孔或反孔很长。对于整数 $k$,$k$-prism 是由两个大小为 $k$ 的团组成的图,通过匹配连接。无长孔图中的最大(权重)独立集(MWIS)的复杂性仍然是一个重要的开放问题。在本文中,我们给出了一个多项式时间算法来解决无长孔图中的 MWIS,没有 $k$-prism(对于任何固定整数 $k$),以及在无长孔图中解决 MWIS 的亚指数算法一般的。作为一个特殊情况,这给出了一个多项式时间算法,可以在没有长反孔和长度为 $6$ 的完美图中找到最大权重团。
更新日期:2020-01-17
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