Seminars and colloquia

E.g., Apr 19, 2025

Tobias Lamm


New estimates for harmonic maps

May 6, 2025 - 3:00 pm to 4:00 pm

MATH 202

TBA Read more
  • Differential geometry

Weiyong He

University of Oregon
Isotopy problems on symplectic four manifolds and geometric flows

May 6, 2025 - 4:00 pm to 5:00 pm

MATH 202

We will discuss the well-known isotopy problem in symplectic geometry in dimension four. Given a compact symplectic four manifold with a fixed symplectic class, a long standing problem is to ask whether all symplectic forms in the cohomology class are path connected (isotopic ... Read more
  • Differential geometry

Zhichao Wang

Fudan University
Existence of embedded minimal tori in three-spheres with positive Ricci curvature

May 6, 2025 - 5:00 pm to 6:00 pm

MATH 202

In this joint work with Xingzhe Li, we prove the strong Morse inequalities for the area functional in the space of embedded tori and spheres in the three sphere. As a consequence, we prove that in the three dimensional sphere with positive Ricci curvature, there exist at least ... Read more
  • Differential geometry

Huang Liding

Xiamen University
The form-type Calabi-Yau equation on a class of complex manifolds

May 7, 2025 - 3:00 pm to 4:00 pm

MATH 202

The Calabi-Yau theorem says that given any smooth representative $\Phi$ of the first Chern class, there exists a unique K\”ahler metric $\omega$ cohomologous to $\alpha$ such that $Ricci(\omega)=\Phi$. It is natural to investigate whether similar results hold when the ... Read more
  • Differential geometry

Man-Chun Lee

The Chinese University of Hong Kong
Expanding soliton from metric cone

May 7, 2025 - 4:00 pm to 5:00 pm

MATH 202

In this talk, we will discuss how Ricci flow smoothing can be used to produce expanding Ricci solitons coming out of a metric cone, when the curvature is non-negative. We will discuss how its relation to problem in Hamilton-Lott pinching conjecture. This is based on joint work ... Read more
  • Differential geometry

John Man Shun Ma

Southern University of Science and Technology
Backward Uniqueness results in Extrinsic Geometric Flow

May 7, 2025 - 5:00 pm to 6:00 pm

MATH 202

In this talk we discuss two backward uniqueness theorems for extrinsic geometric flow of possibly non-compact hypersurfaces in general ambient complete Riemannian manifolds. These are applicable to a wide range of extrinsic geometric flow, including the mean curvature flow, ... Read more
  • Differential geometry