时 间：2018年5月18日下午3:30 - 4:30
题 目：Integer flows of signed graphs
摘 要：The well-known Bouchet’conjecture is that every flow-admissible signed graph admits a nowhere-zero integer 6-flow. Up to now, it remains open, although it has been extensively researched and studied. In this talk, I will give a simple survey on this conjecture, and present our progress on this topic.