20201005 李振坤 Context-free grammars and permutation statistics

『组合数学』学术报告
题目：Context-free grammars and permutation statistics
报告人： 李振坤博士，重庆邮电大学
时间：2020/10/05（周一）14:00-15:00
地点：必赢76net线路唯一官方网站211会议室
摘要：In this talk, we shall give some brief introduction to context-free grammars in combinatorics, and two effective tools arise from grammars: formal derivatives and grammatical labelings. As applications, we determined the joint distributions of several permutation statistics including peaks, valleys, descents and their variations,
and it turned out that the generating functions are related to cylinder parabolic functions. This is a joint work with Amy M. Fu.