【12.27-12.28】Shanghai Conference of Analysis and Geometry

Time:2025-12-20Views:71


Shanghai Conference of Analysis and Geometry
Dec. 27-28, 2025


VenueUSTC Shanghai Institute for Advanced Studies 1A-1329

Organizing Parties
University of Science and Technology of China
ShanghaiTech University
University of Chinese Academy of Sciences


Organizing Committee
Zhongshan An(University of Science and Technology of China
Gao ChenUniversity of Science and Technology of China
Xiuxiong ChenUniversity of Science and Technology of China
Chengjian Yao(ShanghaiTech University
Haitian YueShanghaiTech University
Kai Zheng(University of Chinese Academy of Sciences

Contactigp@ustc.edu.cn


Speakers:

Yifan Chen(UC Berkeley)
Title:when singular Kahler-Einstein metrics are Kahler currents
Abstract:We show that a general class of singular K\ahler metrics with Ricci curvature bounded below define K\ahler currents. In particular the result applies to singular K\ahler-Einstein metrics on klt pairs. If time permits, we will also talk about some application of this result. This is a joint work with Shih-Kai Chiu, Max Hallgren, Gabor Szekelyhidi, Tat Dat To, and Freid Tong.

Shaoming Guo(Nankai University)
Title:Kakeya problems on manifolds and their classifications
Abstract:The talk is about the Euclidean Kakeya problem and its generalizations on manifolds. We will also talk about classifications of Kakeya problems on manifolds, both in the analytic aspect and in the more geometric aspect. 


Yi Li(SIMIS/Fudan University
Title:Curvature estimates on some geometric flows
Abstract:In this talk, I will give curvature esrimates on some geometric flows, includint Ricci flow and G2 flow, and their applications.


Siran Li(Shanghai Jiao Tong University)
Title:TBA
Abstract:TBA


Jianli Liu(Shanghai University
Title:Formation of singularities for the relativistic membrane equation with radial symmetry
Abstract:The relativistic membrane equation occupies a particularly significant position as it describes the dynamics of timelike extremal hypersurfaces in the Minkowski spacetime. The relativistic membrane equation with radial symmetry can be rewritten as a first order hyperbolic system. Making use of the characteristic decomposition method, we give the formation of singularities for the relativistic membrane equation. Indeed, the singularity occurs when the hypersurface turns from being timelike to being null. This generalizes the result of Kong, Sun and Zhou’s work for one-dimensional case [J Math Phys 47(1): 013503, 2006]. This work is jointed with Cai Lv of Shanghai University.


Langte Ma(Shanghai Jiao Tong University
Title:TBA
Abstract:TBA


Jian Wang(University of Chinese Academy of Sciences
Title:Mass Lower Bounds for asymptotically locally flat 4-manifolds
Abstract:The mass is a fundamental global geometric invariant with deep connections to scalar curvature. In this talk, we will present the  mass for asymptotically locally flat (ALF) 4-manifolds and establish the corresponding mass inequality. Specifically, we will talk about how the topology at infinity influences the mass within the ALF setting.


Wei Wang(Zhejiang University)
Title:TBA
Abstract:TBA


Junsheng Zhang(New York University Courant Institute)
Title:TBA
Abstract:TBA


Ting Zhang(Zhejiang University
Title:Well-posedness and ill-posedness results for the multi-dimensional viscoelastic flows
Abstract:In this talk, we mainly focus on the multi-dimensional viscoelastic flows of Oldroyd-B type. First, considering the three dimensional compressible viscoelastic flows with zero shear viscosity, and a general class of pressure laws. We do not need the monotonically increasing pressure law with the help of the elasticity coefficient $\theta$ of the fluid, only need the condition $P^\prime (1)+\theta>0$. We shall reformulate the systems with the new perturbation variables $(\rho-1,u,F-\frac{1}{\rho}I)$ and $(\rho-1,u,F-I)$ to deal with the compressible and incompressible parts, separately. For the compressible parts, we shall use the vector fields methods to derive the weighted energy decay. For the incompressible parts, a local energy decay will be applied to derive the weighted estimates. To overcome the difficulty of the lack of dissipation for the incompressible parts, we shall introduce ``good unknowns'', and use the implicit structure of the nonlinearities. With the help of vector fields, we derive the weighted $L^2$ energy to prove global stability around a constant equilibrium. At last, we also obtain some ill-posedness results. Specifically, we prove that ``norm inflation would happen if the initial data in the critical Besov spaces $\dot{B}^{\frac{{d}}{p}}_{p,1}(\mathbb{R}^{{d}}) \times\dot{B}^{\frac{{d}}{p}-1}_{p,q}(\mathbb{R}^{{d}})\times\dot{B}_{p,1}^{\frac{{d}}{p}}(\mathbb{R}^{{d}})$,  with $(p,q)\in \{({2d},\infty]\times [1,\infty]\}\cup\{\{{2d}\}\times [1,d)\}$.