Branchwidth of graphic matroids
Branchwidth of graphic matroids
复制标题
图形拟阵的分支宽度
DOI:
10.1017/cbo9780511666209.010
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发表时间:
2007
期刊:
影响因子:
--
通讯作者:
Stéphan Thomassé
中科院分区:
文献类型:
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作者:
Frédéric Mazoit;Stéphan Thomassé
Answering a question of Geelen, Gerards, Robertson and Whittle, we prove that the branchwidth of a bridgeless graph is equal to the branchwidth of its cycle matroid. Our proof is based on branch-decompositions of hypergraphs. By matroid duality, a direct corollary of this result is that the branchwidth of a bridgeless planar graph is equal to the branchwidth of its planar dual. This consequence was a direct corollary of a result by Seymour and Thomas.