Universität Duisburg-Essen郑新宪博士学术报告（曹锡华代数论坛）
Universität Duisburg-Essen郑新宪博士学术报告（曹锡华代数论坛）
2018-01-01 12:13 华东师范大学
《曹锡华代数论坛》
学术报告
报告人： 郑新宪博士
（Universität Duisburg-Essen）
题 目： Alexander duality with applications in combinatorics and commutative algebra
摘 要
This is a survey of the results related to Alexander duality in my recent research. One of the fascinating results in classical graph theory is Dirac’s theorem on chordal graphs, that is, on graphs for which each cycle of G of length ≥ 4 has a chord. In this talk we give an algebraic proof of an equivalent form of Dirac’s theorem by showing that a finite graph is chordal if and only if G is the pure 1-skeleton of a quasi-forest.
地 点： 闵行校区第四教学楼221教室
时 间： 2008年3月5日(星期三)下午4:00
欢迎师生踊跃参加！
数学系
2008.2.
