Multiple weak 2-linkage and its applications on integer flows of signed graphs
Multiple weak 2-linkage and its applications on integer flows of signed graphs
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多重弱2-联动及其在有符号图整数流上的应用
DOI:
10.1016/j.ejc.2017.09.002
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发表时间:
2018-03
期刊:
影响因子:
--
通讯作者:
Cun-Quan Zhang
中科院分区:
文献类型:
--
作者:
You Lu;Rong Luo;Cun-Quan Zhang
For two pairs of vertices x 1, y 1 and x 2, y 2, Seymour and Thomassen independently presented a characterization of graphs containing no edge-disjoint (x 1, y 1)-path and (x 2, y 2)-path. In this paper we first generalize their result to k≥ 2 pairs of vertices. Namely, for 2 k vertices x 1, y 1, x 2, y 2,…, x k, y k, we characterize the graphs without edge-disjoint (x i, y i)-path and (x j, y j)-path for any 1≤ i< j≤ k. Then applying this generalization, we present a characterization of signed graphs in which there are no edge-disjoint unbalanced circuits. Finally with this characterization we further show that every flow-admissible signed graph without edge-disjoint unbalanced circuits admits a nowhere-zero 6-flow and thus verify the well-known Bouchet’s 6-flow conjecture for this family of signed graphs.
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DOI:
10.1016/j.jctb.2011.02.007
发表时间:
2011-11
期刊:
Journal of Combinatorial Theory - Series B
影响因子:
--
作者:
Andre Raspaud;Xuding Zhu
通讯作者:
Xuding Zhu
影响因子:
0.9
作者:
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DOI:
10.1016/j.jctb.2014.12.002
发表时间:
2012-11
期刊:
J. Comb. Theory B
影响因子:
--
作者:
Xuding Zhu
通讯作者:
Xuding Zhu
DOI:
--
发表时间:
2016-04
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
Edita Rollov'a;Michael Schubert;E. Steffen
通讯作者:
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DOI:
--
发表时间:
2013-10
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
Matt DeVos
通讯作者:
Matt DeVos