At the Big Island, Hawaii, by Hongjie Zeng.
I am Yusen Xia (in Chinese: 夏雨森, which reads "hsia yü sen "). I’m a 5th year PhD student at Mathematics Department, UC Santa Barabra. I got my BSc in Mathematics degree (with First Class honors) from Hong Kong University of Science & Technology (HKUST). I was an exchange student at UCLA from Winter to Spring 2020.
My CV is here.
I am currently insterested in geometric analysis, in particular eigenvalue problems of Laplace operator on manifolds.
Email: yusen (AT) ucsb (DOT) edu
Department of Mathematics, University of California, Santa Barbara
552 University Rd, South Hall, Santa Barbara, CA 93106
On the PPW Conjecture for Hopf-Symmetric Sets in Non-compact Rank One Symmetric Space (arXiv:2505.18439)
Pure Math Seminar, Hong Kong University of Science and Technology, July 2025
Math Department Seminar, South China University of Technology, July 2025
Youtube Channel of Instituto de Matemática Pura e Aplicada (IMPA): https://www.youtube.com/user/impabr