主讲人：Prof.  Weiqiang Wang（王伟强教授）

主持人： 罗栗 

开始时间：2019-3-14 下午 13:30-14:30 

讲座地址：数学楼126室

主办单位：数学科学学院 科技处 

报告人简介：

王伟强教授任职于美国弗吉尼亚大学数学系，是国际上极具影响力的表示论研究专家。他的重要工作发表在《Inv. Math.》, 《Duke Math. J.》等诸多数学顶级杂志上，总被引次数过千。他还著有Graduate Studies in Mathematics系列第144卷 《Dualities and representations of Lie superalgebras》。同时王伟强教授还担任国际一流数学期刊 《Int. Math. Res. Not.》 的编委。

报告内容简介：

A quantum symmetric pair consists of a quantum group and its coideal subalgebra (called an i-quantum group). Quantum groups can be viewed as an example of i-quantum groups associated to symmetric pairs of diagonal type. In recent years, many fundamental constructions for quantum groups have been generalized to the i-quantum group setting. In this talk, we present a categorification of i-quantum groups via a new Hall algebra approach. This relies on the framework of modified Ringel-Hall algebras of Ming Lu and Liangang Peng. Our approach leads to monomial bases, PBW bases, and braid group actions for i-quantum groups. In case of symmetric pairs of diagonal type, our work reduces to a reformulation of Bridgeland's Hall algebra realization of a quantum group, which in turn was a generalization of earlier constructions of Ringel and Lusztig for half a quantum group. This is joint work with Min Lu (Sichuan University).