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Cardinality constrained minimum cut problems: complexity and algorithms

机译:基数约束最小割问题:复杂性和算法

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摘要

In several applications the solutions of combinatorial optimization problems (COP) are required to satisfy an additional cardinality constraint, that is to contain a fixed number of elements. So far the family of (COP) with cardinality constraints has been little investigated. The present work tackles a new problem of this class: the k-cardinality minimum cut problem (k-card cut). For a number of variants of this problem we show complexity results in the most significant graph classes. Moreover, we develop several heuristic algorithms for the k-card cut problem for complete, complete bipartite, and general graphs. Lower bounds are obtained through an SDP formulation, and used to show the quality of the heuristics. Finally, we present a randomized SDP heuristic and numerical results.
机译:在一些应用中,需要组合优化问题(COP)的解决方案来满足附加的基数约束,即包含固定数量的元素。到目前为止,对具有基数约束的(COP)家族的研究很少。当前的工作解决了这一类的新问题:k基数最小割问题(k卡割)。对于此问题的许多变体,我们在最重要的图类中显示了复杂性结果。此外,我们针对完整,完整的二部图和一般图针对k卡切割问题开发了几种启发式算法。下限是通过SDP公式获得的,用于显示启发式方法的质量。最后,我们提出了随机的SDP启发式方法和数值结果。

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