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.