Theme: Changes in Time Use and Experienced HappinessSpeaker: Jeehoon Han, assistant professor, School of Economics, Zhejiang UniversityVenue: Room 121 Lecture Hall, School of Economics, Zijingang Campus

Speaker: SHI Yuguang, professor, School of Mathematical ScienPeking UniversityOnline Seminar: Room 200-9, Run Run Shaw Business Administration Building, Yuquan Campus In this talk, we will prove positive mass theorems for ALF and ALG manifolds with model spaces $R^{n-1}\times S^1$ and $R^{n-2}\times T^2$ respectively in dimensions no greater than 7. Different from the compatibility condition for spin structure in Theorem 2 of V. Minerbe’s paper A mass for ALF manifolds, Comm. Math. Phys. 289 (2009), no. 3, 925–955 we show that some type of incompressible condition for $S^1$ and $T^2$ is enough to guarantee the nonnegativity of the mass. As in the asymptotically flat case, we reduce the desired positive mass theorems to those ones concerning non-existence of positive scalar curvature metrics on closed manifolds coming from generalize surgery to -torus. Finally, we investigate certain fill-in problems and obtain an optimal bound for total mean curvature of admissible fill-ins for flat product 2-torus $S^1(l_1)\times S^1(l_2)$. This talk is based on the paper joint with my Ph.D. students Peng Liu and Jintian Zhu, here is the link of the paper :http://arxiv.org/abs/2103.11289.  Contact Person: Sheng Weimin（shengweimin@zju.edu.cn）

Speaker：LI Wei, associate professor, College of Business, Shanghai University of Finance and Economics Venue：Room 530, School of Economics, Zijingang CampusAbstract：We study the consumption-portfolio decision of a household with limited information-processing ca-pacity (rational inattention) in a two-country equilibrium model under recursive utility. Our rationally inattentive household reacts gradually to asset return innovations and naturally concerns about long-run consumption risk, which implies less volatile and less cross-country correlated stochastic discount factors. Despite the high correlation of international stock markets, we are able to generate 1) relative consumption growth and real exchange rate depreciations has a correlation close to zero or negative (Backus-Smith puzzle); 2)fluctuations in exchange rate is not so volatile; 3)consumption is less volatile than real exchange rate.

Speaker: WANG Xianhua, Professor of Shanghai International Studies University，Director of Institute for Global History of Civilization, Shanghai International Studies UniversityVenue: Room 429, School of Humanities, Zijingang Campus

Speaker: Malcolm Forster, Distinguished Professor, Fudan UniversitySpeaker: Malcolm Forster, Distinguished Professor, Fudan University, Shanghai, Chinahttp://philosophy.fudan.edu.cn/03/a4/c14253a263076/page.htmVenue: Room 513, School of Humanities, Zijingang Campus

Speaker: ZHANG Hong, investigator, Institute of Biophysics, Chinese Academy of SciencesVenue: Room 205, Administrative Building, School of Medicine, Zijingang Campus

Date: April 20-21High Performance biopolymers and nano-functional materials.pdf

Speaker: ZHOU Bin, Associate Professor of Peking UniversityVenue: Room 200-9, Sir Run Run Shaw Business Administration Building, Yuquan CampusAbstract:In this talk, I will first review the Bernstein theorem for a class of fourth order equations of Monge-Ampere type, including the affine maximal surface equation and Abreu’s equation. The famous affine Bernstein theorem, also called Chern’s conjecture, was first proved by Trudinger-Wang in dimension two in 2000. Then I will present a new proof without using Caffarelli-Gutierrez’s regularity for the linearized Monge-Ampere equation. The new idea is to establish the interior estimates of the fourth order equations by partial Legendre transform.

Surface Engineering of Biomedical Materials via Bioinspired Strategy by Prof. JI JianVenue: LTW 102/103 Tiered Lecture Classroom, International Campus, Haining