主讲人：张印火教授

主持人：胡乃红教授

开始时间：2017-9-29（周五）  15：00-16：00

讲座地址：闵行校区数学楼401报告厅

报告人简介：

比利时Hasselt大学数学系教授、Hopf代数、量子群与非交换几何专家张印火教授。

报告内容简介：

We study the Green ring and the stable Green ring of a finite dimensional Hopf algebra by means of bilinear forms. We show that the Green ring of a Hopf algebra of finite representation type is a Frobenius algebra over $\mathbb{Z}$ with a dual basis associated to almost split sequences.  On the stable Green ring we define a new bilinear form which is more accurate to determine the bi-Frobenius algebra structure on the stable Green ring. We show that the complexified stable Green algebra is a group-like algebra, and hence a bi-Frobenius algebra, if the bilinear form on the stable Green ring is non-degenerate.