1998年11月
Two arc-disjoint paths in Eulerian digraphs
SIAM JOURNAL ON DISCRETE MATHEMATICS
- ,
- ,
- 巻
- 11
- 号
- 4
- 開始ページ
- 557
- 終了ページ
- 589
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1137/S0895480196304970
- 出版者・発行元
- SIAM PUBLICATIONS
Let G be an Eulerian digraph, and let {x(1), x(2)}, {y(1), y(2)} be two pairs of vertices in G. A directed path from a vertex s to a vertex t is called an st-path. An instance (G; {x(1); x(2)}, {y(1), y(2)}) is called feasible if there is a choice of h, i, j, k with {h, i} = { j, k} = {1, 2} such that G has two arc-disjoint x(h) x(i)- and y(j) y(k)-paths. In this paper, we characterize the structure of minimal infeasible instances, based on which an O(m + n log n) time algorithm is presented to decide whether a given instance is feasible, where n and m are the number of vertices and arcs in the instance, respectively. If the instance is feasible, the corresponding two arc-disjoint paths can be computed in O(m(m + n log n)) time.
- リンク情報
- ID情報
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- DOI : 10.1137/S0895480196304970
- ISSN : 0895-4801
- Web of Science ID : WOS:000075676500004