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首页> 外文期刊>Journal of combinatorial optimization >Randomized parameterized algorithms for P-2-Packing and Co-Path Packing problems
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Randomized parameterized algorithms for P-2-Packing and Co-Path Packing problems

机译:用于P-2-Packing和Co-Path Packing问题的随机参数化算法

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摘要

In this paper, we study the Parameterized P-2-Packing problem and Parameterized Co-Path Packing problem from random perspective. For the Parameterized P-2-Packing problem, based on the structure analysis of the problem and using random partition technique, a randomized parameterized algorithm of running time O*(6.75(k)) is obtained, improving the current best result O*(8(k)). For the Parameterized Co-Path Packing problem, we firstly study the kernel and randomized algorithm for the degree-bounded instance, where each vertex in the instance has degree at most three. A kernel of size 20k and a randomized algorithm of running time O*(2(k)) are given for the Parameterized Co-Path Packing problem with bounded degree constraint. By applying iterative compression technique and based on the randomized algorithm for degree bounded problem, a randomized algorithm of running time O*(3(k)) is given for the Parameterized Co-Path Packing problem.
机译:在本文中,我们从随机的角度研究了参数化P-2-Packing问题和参数化Co-Path Packing问题。对于参数化P-2-Packing问题,基于问题的结构分析并使用随机分区技术,获得了运行时间O *(6.75(k))的随机参数化算法,从而改善了当前的最佳结果O *( 8(k))。对于参数化共路径打包问题,我们首先研究度约束实例的内核和随机算法,其中实例中的每个顶点最多具有三个度。针对有界度约束的参数化共路径压缩问题,给出了大小为20k的内核和运行时间为O *(2(k))的随机算法。通过应用迭代压缩技术,并基于度界问题的随机算法,针对参数化共路径打包问题给出了运行时间O *(3(k))的随机算法。

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