A linear-time kernelization for the Rooted k-Leaf Outbranching Problem
A linear-time kernelization for the Rooted k-Leaf Outbranching Problem
复制标题
有根 k 叶分支问题的线性时间核化
DOI:
10.1016/j.dam.2015.04.028
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Frank Kammer
中科院分区:
文献类型:
--
作者:
Frank Kammer
Abstract In the Rooted k-Leaf Outbranching Problem, a digraph G=(V, E), a vertex r of G, and an integer k are given, and the goal is to find an r-rooted spanning outtree of G with≥ k leaves (a subtree of G with vertex set V, all edges directed away from r, and≥ k leaves). We present a linear-time algorithm that computes a problem kernel with O (k 6) vertices and O (k 7) edges for the Rooted k-Leaf Outbranching Problem. By combining the new result with a result of Daligault and Thomassé (2009), a kernel with a quadratic number of vertices and edges can be found on n-vertex m-edge digraphs in time O (n+ m+ k 14).
DOI:
10.1007/978-3-662-44465-8_24
发表时间:
2014
期刊:
ArXiv
影响因子:
--
作者:
Stefan Fafianie;Stefan Kratsch
通讯作者:
Stefan Kratsch
影响因子:
1.1
作者:
René van Bevern
通讯作者:
René van Bevern