Circular flow on signed graphs
Circular flow on signed graphs
复制标题
带符号图上的循环流
DOI:
10.1016/j.jctb.2011.02.007
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发表时间:
2011-11
期刊:
影响因子:
--
通讯作者:
Xuding Zhu
中科院分区:
文献类型:
--
作者:
Andre Raspaud;Xuding Zhu
The circular flow number Φc(G,σ) of a signed graph (G,σ) is the minimum r for which an orientation of (G,σ) admits a circular r-flow. We prove that the circular flow number of a signed graph (G,σ) is equal to the minimum imbalance ratio of an orientation of (G,σ). We then use this result to prove that if G is 4-edge-connected and (G,σ) has a nowhere zero flow, then Φc(G,σ) (as well as Φ(G,σ)) is at most 4. If G is 6-edge-connected and (G,σ) has a nowhere zero flow, then Φc(G,σ) is strictly less than 4.
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DOI:
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发表时间:
2001-02
期刊:
Discret. Math.
影响因子:
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作者:
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DOI:
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影响因子:
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