On Reachability Mixed Arborescence Packing
Discrete Mathematics
2018-08-23 v1 Combinatorics
Abstract
As a generalization of the Edmonds arborescence packing theorem, Kamiyama--Katoh--Takizawa (2009) gave a good characterization of directed graphs that contain arc-disjoint arborescences spanning the set of vertices reachable from each root. Fortier--Kir\'aly--L\'eonard--Szigeti--Talon (2018) asked whether the result can be extended to mixed graphs by allowing both directed arcs and undirected edges. In this paper, we solve this question by developing a polynomial-time algorithm for finding a collection of edge and arc-disjoint arborescences spanning the set of vertices reachable from each root in a given mixed graph.
Cite
@article{arxiv.1808.07332,
title = {On Reachability Mixed Arborescence Packing},
author = {Tatsuya Matsuoka and Shin-ichi Tanigawa},
journal= {arXiv preprint arXiv:1808.07332},
year = {2018}
}
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10 pages