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arXiv 2006.03578cs.DMcs.CCmath.CO
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clique-Width: 操纵原子的力量

Clique-Width: Harnessing the Power of Atoms

Durham University(杜伦大学);Charles University, Prague(布拉格查理大学);Institute of Informatics, University of Warsaw(华沙大学信息学研究所);Simon Fraser University(西蒙菲莎大学);Warsaw University of Technology(华沙理工大学)

Konrad K. Dabrowski, Tomáš Masařík, Jana Novotná, Daniël Paulusma, Paweł Rzążewski

AI总结:

本文研究了hereditary图类原子的clique-width有界性,证明了存在特定的(H1,H2)对,使得这些原子的clique-width有界。

摘要:

许多NP完全的图问题在具有受限clique-width的图类上可以多项式时间解决。几个这些问题在hereditary图类G上多项式时间解决,如果它们在G的原子(无clique cut-set的图)上也能解决。因此,我们开始系统研究hereditary图类原子的clique-width的有界性。一个图G是H-free的,如果H不是G的诱导子图,且是(H1,H2)-free的如果它同时是H1-free和H2-free。一个H-free图类有界clique-width当且仅当其原子具有此性质。这不再适用于(H1,H2)-free图,如已知的一个例子所示。我们证明了另一个这样的对(H1,H2)的存在,并对所有但18种情况分类了(H1,H2)-free原子上的clique-width有界性。

英文摘要:

Many NP-complete graph problems are polynomial-time solvable on graph classes of bounded clique-width. Several of these problems are polynomial-time solvable on a hereditary graph class ${\cal G}$ if they are so on the atoms (graphs with no clique cut-set) of ${\cal G}$. Hence, we initiate a systematic study into boundedness of clique-width of atoms of hereditary graph classes. A graph $G$ is $H$-free if $H$ is not an induced subgraph of $G$, and it is $(H_1,H_2)$-free if it is both $H_1$-free and $H_2$-free. A class of $H$-free graphs has bounded clique-width if and only if its atoms have this property. This is no longer true for $(H_1,H_2)$-free graphs, as evidenced by one known example. We prove the existence of another such pair $(H_1,H_2)$ and classify the boundedness of clique-width on $(H_1,H_2)$-free atoms for all but 18 cases.

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。

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