Zu Chongzhi Research Seminar

Date and Time (China standard time): Monday, May 4, 10:30 – 11:30 am

Location: WDR 1100

Zoom: 989 3079 3346, Passcode: dkumath

Title: Restriction conjecture,  Bochner-Riesz conjecture and a question of Hörmander

Speaker: Yakun Xi, Zhejiang University

Abstract: This talk presents progress on the restriction problem, Bochner–Riesz summability. In particular, we provide a full solution to a question of Hörmander.

Bio: Yakun Xi is a researcher and tenured associate professor at the School of Mathematical Sciences, Zhejiang University. He studied in the Department of Mathematics at Zhejiang University from 2008 to 2012 and received his bachelor’s degree in Mathematics and Applied Mathematics. From 2012 to 2017, he completed his PhD at Johns Hopkins University in the United States under the supervision of Professor Christopher D. Sogge. From 2017 to 2020, he was a visiting assistant professor at the University of Rochester (USA). He joined the School of Mathematical Sciences at Zhejiang University in August 2020 as a research professor, and has served as a tenured associate professor since 2024.