Graph Minors. XXII. Irrelevant vertices in linkage problems
Graph Minors. XXII. Irrelevant vertices in linkage problems
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图未成年人。
DOI:
10.1016/j.jctb.2007.12.007
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
P. Seymour
中科院分区:
文献类型:
--
作者:
N. Robertson;P. Seymour
In the algorithm for the disjoint paths problem given in Graph Minors XIII, we used without proof a lemma that, in solving such a problem, a vertex which was sufficiently “insulated” from the rest of the graph by a large planar piece of the graph was irrelevant, and could be deleted without changing the problem. In this paper we prove the lemma.