题目：On the Kelmans-Seymour conjecture on K₅-subdivisions

报告人：郁星星 教授

（Georgia Institute of Technology）

Abstract: Kelmans and Seymour independently conjectured in the 1970s that every 5-connected nonplanar graph contains a subdivision of $K_5$. Ma and Yu proved that this conjecture holds for graphs containing $K_4^-$. I will discuss recent progress we made on this conjecture. This is a joint work with Dawei He and Yan Wang.

时间：2015年7月8日（周三）16:00开始

地点：首都师大北二区教学楼 130 教室

欢迎全体师生积极参加！