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吴文俊数学重点实验室组合图论系列讲座之八十六
报告题目:Integer 11-flows of signed graphs

报告人:Prof. CQ Zhang(West Virginia University, USA)

报告时间:7月19日3:00-4:00

报告地点:1518

摘要:

In 1983, Bouchet proposed a conjecture that every flow-admissible signed graph has a nowhere-zero 6-flow.  Recently, DeVos proved that every such signed graph admits a nowhere-zero 12-flow.  In this talk, we will present a recent improvement of DeVos's result for bridgeless signed graphs, and show that every bridgeless flow-admissible signed graph admits a nowhere-zero 11-flow.
中国科学院吴文俊数学重点实验室