报告题目：A categorification of signed chromatic polynomial

报告人：程志云

单位：北京师范大学

时间：2023年3月17日上午10:00

地点： 学院二楼会议室

摘要：In 2000, by combining the idea of Kauffman bracket and TQFT, Khovanov introduced a bigraded cohomology invariant of knots, which can be regarded as a categorification of the Jones polynomial. Later, motivated by Khovanov’s work Laure Helme-Guizon and Yongwu Rong introduced bigraded cohomology groups for graphs, which categorify the chromatic polynomial. In this talk, I will discuss how to define a categorification of signed chromatic polynomial. This is a joint work with Lei ziyi, Wang Yitian and Zhang Yanguo.

简介：程志云，北京师范大学数学科学学院副教授，副经理。主要研究兴趣是低维拓扑，尤其是纽结理论。在Algebraic & geometric topology等专业高水平期刊发表学术论文多篇.