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arXiv 1105.0477cs.DS
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k边诱导子图的参数化复杂性

The parameterized complexity of k-edge induced subgraphs

Bingkai Lin, Yijia Chen

摘要:

证明了寻找一个$k$ -边导出子图是固定参数易处理的,从而回答了蔡雷珍的一个公开问题。我们的算法是基于几个组合的观察,高斯著名的\emph{Eureka}定理[安德鲁斯,86],和一个推广的著名的FPT算法的模型检查问题的一阶逻辑图与局部有界树宽度由于弗里克和Grohe [弗里克和Grohe,01]。另一方面,我们表明,两个自然计数版本的问题是很难的。因此,$k$ -边导出子图问题是已知的参数复杂度中少有的易判定而难计数的例子之一。

英文摘要:

We prove that finding a $k$-edge induced subgraph is fixed-parameter tractable, thereby answering an open problem of Leizhen Cai. Our algorithm is based on several combinatorial observations, Gauss' famous \emph{Eureka} theorem [Andrews, 86], and a generalization of the well-known fpt-algorithm for the model-checking problem for first-order logic on graphs with locally bounded tree-width due to Frick and Grohe [Frick and Grohe, 01]. On the other hand, we show that two natural counting versions of the problem are hard. Hence, the $k$-edge induced subgraph problem is one of the rare known examples in parameterized complexity that are easy for decision while hard for counting.

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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