『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：澳门新葡京娱乐城 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.