报告题目：

Integer flows and modular flows of signed graphs

报告时间: 2018年6月18日14点30分-15点30分

报告地点: 数学院大会议室

报告人: 罗荣 教授 （西弗吉尼亚大学）

内容摘要：

For ordinary graphs, Tutte proved that the integer flows and modular flows are equivalent. However this equivalence doesn't hold for signed graphs. In this talk, I will discuss how to convert modular flows into integer flows and present some new results on flows on signed graphs.

报告人简介: 罗荣，美国西弗吉尼亚大学（West Virginia University，USA）数学系教授。主要研究图的染色理论和流的理论。发表60余篇论文多数在图论顶尖杂志上，如Journal of Cominatorial Theory Ser. B, Journal of Graph Theory, SIAM Journal on Discrete Math, European J. of Combinatorics.