2025

04

2025-03

组合数学系列报告——Flag-transitive 2-designs with prime-square or prime-cube block length

报告人：周胜林（华南理工大学）时间：2025年3月7日,11:00-12:00地点：海纳苑2幢820室摘要：We study 2-(v,k, lambda) designs D=(P, B) admitting a flag-transitive automorphism group G, where k=p^2 or p^3, and p is prime. We prove that if k=p^2, then G must be point-primitive, and G is of affine or almost simple type except for two examples. If k=p^3, and G is point-primitive, then G is of aff...

04

2025-03

组合数学系列报告——On EKR-type problems for permutation groups

报告人：谢贻林（南方科技大学）时间：2025年3月7日，10:00-11:00地点：海纳苑2幢820摘要：Let G be a transitive permutation group on Omega, a subset S of G is intersecting if for any two elements s_1,s_2 in S, there exists an w in Omega such that w^{s_1}=w^{s_2}, or equivalently s_1s_2^{-1} in G_w for some w in Omega. An intersecting subset S is maximum if S has the maximal size among all intersecting ...

02

2025-03

IASM Distinguished Lectures——Geometric theory of variety of minimal rational tangents and recognition problems on G/P and their uniruled projective subvarieies

20

2025-02

School Colloquium——PDE methods in geometric analysis

06

2025-01

Approximate Message Passing for Rotationally-Invariant Models: A Unified Framework and Applications to Spiked Models

报告人：马俊杰时间：2025/01/17 13:00-17:00地点：线上报告腾讯会议ID：321-587-300摘要：In the first part of this talk, we present a unified framework for constructing Approximate Message Passing (AMP) algorithms for rotationally-invariant models. By employing a general iterative algorithm template and reducing it to long-memory Orthogonal AMP (OAMP), we...

03

2025-01

A new proof of the Eichler Shimura relation

Speaker: Pol van Hoften (Vrije Universiteit Amsterdam)Time: 2025-01-15，10:00Location: 海纳苑2幢210Abstract: Associated to a modular form f is a two-dimensional Galois representation whose Frobenius eigenvalues can be expressed in terms of the Fourier coefficients of f, using a formula known as the Eichler--Shimura congruence relation. This relation was proved by Eichler--Shimu...

03

2025-01

Homological method in branching laws

Speaker: 陈睿（浙江大学）Time: 2025-01-07，16:00Location: 海纳苑2幢210Abstract: Understanding how a representation decomposes when restricted to a 'nice' subgroup is a problem of fundamental interest in representation theory. In this talk, following D. Prasad, we will discuss some recent results of the homological method in branching laws, especially a vanis...

02

2025-01

Problems related to pointwise convergence for Schrodinger groups

Speaker: 邓清泉（华中师范大学）Time: 2025-01-07，10:20-11:20Location: 海纳苑2幢205Abstract: In this work, we focus on the maximal estimates and pointwise convergence for Schrodinger group $e^{itH}$ with potentials in dimension one, where $H=-\Delta+V$. Under some assumptions on potential V, by using the distorted Fourier transform, as well as the function spaces associat...

02

2025-01

Some progress on dispersive estimates of higher order elliptic operator

Speaker: 尧小华（华中师范大学）Time: 2025-01-07，9:15-10:15Location: 海纳苑2幢205Abstract: The dispersive estimates of Schr\”odinger operators are interesting topics, which play fundamental roles in the wellposedness of nonlinear dispersive equations and the stability of solitary waves. In this talk, I will recall some classical works on Kato smoothing, Strichartz ...

31

2024-12

Mean curvature flow and applications