报告题目：Rota-Baxter Algebras and Quasi-Symmetric Functions

报告时间：2018年11月07日（星期三）16:30

报告地点：翡翠科教楼B1710

报 告 人：郭锂 教授

工作单位：Rutgers University-Newark

举办单位：数学学院

报告简介：

In the 1960s, Rota applied his first construction of free Rota-Baxter algebra and his algebraic formulation of Spitzer's identity to obtain the well-known Waring formula which relates elementary symmetric functions to power symmetric functions. He later suggested that there should be a close connection between Rota-Baxter algebras and generalizations of symmetric functions. He claimed, "In short, (Rota-)Baxter algebras represent the ultimate and most natural generalization of the algebra of symmetric functions." We present some results that verify Rota's claim. We show that a free commutative Rota-Baxter algebra can be interpreted as generalized quasi-symmetric functions from weak compositions. This equips the free commutative Rota-Baxter algebra with a natural Hopf algebra structure.This is joint work with Jean-Yves Thibon, Houyi Yu and Jianqiang Zhao.

报告人简介：

郭锂，美国罗格斯(Rutgers)大学教授，江西师范大学特聘教授。郭锂于华盛顿大学获博士学位，在俄亥俄州立大学、普林斯顿高等研究院和佐治亚州大学作博士后。现任罗格斯大学数学与计算机科学系系主任。郭锂博士的数论工作为怀尔斯证明费马大定理的文章所引用，并将重整化这一物理方法应用于数学研究。他近年来推动Rota-Baxter代数及相关数学和数学物理的研究，应邀为美国数学会在“What Is”栏目中介绍Rota-Baxter代数，并出版这个领域的第一部专著。研究涉及结合代数，李代数，Hopf代数，operad，数论，组合，计算数学，量子场论和可积系统等数学和理论物理的广泛领域。