Geometry and Topology Seminar

• This seminar aims at topics in the areas of Quantitative Topology and Quantitative Geometry, Metric Topology and Metric Geometry, Simplicial Volume and Bounded Cohomology, Topological Complexity, Hyperbolic Geometry, Geometric Topology, Coarse Geometry and K-theory, Differential Geometry and related subjects.

• Talks are conducted either in person (with hybrid options) or online, as indicated. In-person sessions are usually scheduled on Friday, while online talks are scheduled in China Standard Time (GMT+8).
• Usually talks are recorded. Videos will be made available online upon approval of the speakers.
• If you are interested in presenting a talk, please send a message to lizhi.chen.math@gmail.com (lizhi (dot) chen (dot) math (at) gmail (dot) com).
• If you wish to be on the seminar mailing list and receive announcements, please send an email to geometrytopology2024@gmail.com (geometrytopology2024 (at) gmail (dot) com). Or if you wish to be removed from the mailing list, please send an email to the same address.

• Lizhi Chen (Lanzhou University) - https://sites.google.com/site/chenzhmath
• Bo Zhu (Texas A&M University) - https://sites.google.com/view/bozhumath/

Spring 2025

Title: TBA
Speaker: Kai Xu (Duke University) - https://services.math.duke.edu/~kx35/
Time: Friday, April 11
Location: Virtual (Tencent Meeting: )

Title: Spectrum on locally symmetric spaces
Speaker: Hongwei Zhang (Paderborn University) - https://zhangh-w.github.io/
Time: Friday, March 14, 4:00PM
Location: Virtual (Tencent Meeting: )
View Abstract

Title: Geometric structures, Gromov norm and Kodaira dimensions
Speaker: Weiyi Zhang (University of Warwick) - https://homepages.warwick.ac.uk/staff/Weiyi.Zhang/
Time: Friday, February 14, 7:30AM
Location: Virtual (Zoom: 931 6643 0051)
View Abstract     View Slides     View Recording

Title: Rational ellipticity of Riemannian manifolds
Speaker: Xiaoyang Chen (Tongji University) - https://math.tongji.edu.cn/info/1218/9341.htm
Time: Wednesday, January 22, 10:00AM
Location: Virtual (Tencent Meeting: 890-686-6792, Password: 202501)
View Abstract     View Slides     Video Recording

Fall 2024

Simplicial volume and isolated, closed totally geodesic submanifolds of codimension one
Speaker: Yuping Ruan (Northwestern University) - https://sites.google.com/view/yupingruanmath/home
Time: Saturday, December 21, 10:30AM
Location: Virtual (Tencent Meeting: 890-686-6792, Password: 202412)
View Abstract     View Slides     Video Recording

A new vanishing criterion for bounded cohomology
Speaker: Caterina Campagnolo (Autonomous University of Madrid) - https://matematicas.uam.es/~caterina.campagnolo/
Time: Wednesday, December 04, 9:00PM
Location: Virtual (Zoom Meeting: 931 6643 0051)
View Abstract     View Slides     Video Recording

Systolic inequality on Riemannian manifold with bounded Ricci curvature
Speaker: Zhifei Zhu (Yau Mathematical Sciences Center, Tsinghua University) - https://zhifeizhu92.github.io/
Time: Friday, November 22, 10:30AM
Location: Virtual (Tencent Meeting: 890-686-6792, Password: 202411)
View Abstract     View Slides     Video Recording

From Thurston norm to geodesic laminations and fibered geometry
Speaker: Xiaolong Hans Han (Shanghai Institute for Mathematics and Interdisciplinary Sciences) - https://sites.google.com/view/hansmin/home
Time: Thursday, November 14, 10:30AM
Location: Virtual (Tencent Meeting: 890-686-6792, Password: 202411)
View Abstract    

Thurston norm and the geometry of surfaces
Speaker: Xiaolong Hans Han (Shanghai Institute for Mathematics and Interdisciplinary Sciences) - https://sites.google.com/view/hansmin/home
Time: Thursday, November 07, 10:30AM
Location: Virtual (Tencent Meeting: 474-525-672, Password: 202411)
View Abstract     View Slides     Video Recording

拓扑、代数几何与算法的复杂度 (Topology, Algebraic Geometry and Complexity of Algorithms)
Speaker: Weiyan Chen (Yau Mathematical Sciences Center, Tsinghua University) - https://www.weiyanc.com/
Time: Friday, October 25, 10:30AM
Location: Virtual (Tencent Meeting: 847-645-031, Password: 202410)
View Abstract     View Slides     Video Recording

Gromov norm on nonpositively curved manifolds
Speaker: Shi Wang (ShanghaiTech University) - https://sites.google.com/site/shiwangmath/
Time: Friday, September 20, 10:30AM
Location: Virtual (Tencent Meeting: 584 131 419)
View Abstract     View Slides     Video Recording

Fall 2023

A simple guide to shearing surfaces
Speaker: Yi Huang (Yau Mathematical Sciences Center, Tsinghua University) - https://www.yihuang.site/
Time: Monday, December 4, 11:00AM
Location: LG 631
View Abstract

Orderability of groups and 3-manifold topology
Speaker: Ying Hu (University of Nebraska Omaha) - https://yinghu-math.github.io/
Time: Monday, August 4, 3:00PM
Location: LG 401
View Abstract

Fall 2022

Tensor Triangular Geometry with Application on the Category of Pseudo-coherent Complexes
Speaker: Yufei Zhang (University of California Santa Cruz)
Time: Saturday, December 17, 10:30AM
Location: Virtual (Tencent Meeting: 617-581-938, Password: 202212)
Abstract

Producing circle patterns via configurations
Speaker: Ze Zhou (Shenzhen University) - https://math.szu.edu.cn/info/1095/2834.htm
Time: Thursday, November 10, 3:00PM
Location: Virtual (Tencent Meeting: 679-505-478, Password: 202211)
Abstract

Spring 2021

几何群论中的计数问题 (Counting problems in geometric group theory)
Speaker: Wenyuan Yang (BICMR, Peking University) - http://faculty.bicmr.pku.edu.cn/~wyang/
Time: Tuesday, June 29, 3:30PM
Location: LG 631
Abstract