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科学研究
RESEARCH
A categorification of signed chromatic polynomial
时间  Datetime
2020-11-27 16:00 — 17:00
地点  Venue
会议室(703)
报告人  Speaker
程志云
单位  Affiliation
北京师范大学
邀请人  Host
李友林
备注  remarks
报告摘要  Abstract

Chromatic polynomial, which encodes the number of distinct ways to color the vertices of a graph, was introduced by George David Birkhoff in 1912 in attempt to attack the four-color problem. Motivated by the work of Khovanov, Helme-Guizon and Rong introduced a categorification of the chromatic polynomial. In this talk, I will give a brief introduction to this construction. If time permits, I will discuss how to define a categorification of signed chromatic polynomial. This is a joint work with Ziyi Lei, Yitian Wang and Yanguo Zhang.