曹锡华代数论坛（校级学术报告）
题目I：Quantum Supergroups and Knot Invariants （量子超群与扭结不变量理论）
演讲人：R. B. Zhang (张瑞兵) 教授
--- School of mathematics and Statistics，University of Sydney

Abstract：Quantum supergroups were introduced to describe deformed supersymmetries of some 2-dimensional soluble models in physics, but they also turned out to be useful for studying low dimensional topology. This talk is a brief introduction to quantum supergroups. We shall explain what quantum supergroups are, describe aspects of their representation theory, and discuss their application in the construction of topological invariants of knots and 3-manifolds.

题目II：On N=1 string vacua and its deformations（关于N=1的弦真空及形变）
演讲人：中国科技大学数学学院百人计划学者、中科大上海浦东高等研究院数理中心主任 胡森 教授

Abstract：In this talk, we study a moduli space of N=1 string vacua and its deformation space. The work is based on previous work on G-structures and parallel spinors. Together with dilatino equation and the Bianchi identity we obtain solutions with NS flux background. The space of such solutions are identified with special solutions with vanishing of some components of the intrinsic torsion for a fixed conformal class of metrics times rescaling functions which are harmonic functions by the Bianchi identity. As a result we are able to identify deformation space of such solutions which are useful in the study of string compactifications.

时间：1月10日，15：00--17：00
地点：理科大楼A 1414室