Lecture Content：

In this talk, I will introduce our recentwork on the stability of isometries on positive cones of trace class operators.We finally give an affirmative answer in the finite-dimensional case. This is ajoint work with Yunbai Dong, Denny H. Leung and Baoyue Zhang.  

Speaker Introduction:

Lei Li is currently a Professor andDoctoral Supervisor at the School of Mathematical Sciences, Nankai University.He previously served as a Postdoctoral Researcher at National Sun Yat-senUniversity, Taiwan, and a Visiting Scholar at Queen Mary University of London,UK. His main research interest is functional analysis. He has published over 60SCI papers in mathematical journals including Mathematische Annalen, Journal ofFunctional Analysis, Journal of Algebra, Israel Journal of Mathematics, Journalof Operator Theory, Studia Mathematica, and Proceedings of the AmericanMathematical Society.