Geometric Analysis Seminar

Seminar information archive ~04/30Next seminarFuture seminars 05/01~

Organizer(s) Shouhei Honda, Hokuto Konno, Asuka Takatsu
URL https://sites.google.com/g.ecc.u-tokyo.ac.jp/geometricanalysisseminar/

2025/06/05

14:00-16:30   Room #002 (Graduate School of Math. Sci. Bldg.)
Chao Li (New York University) 14:00-15:00
On the topology of stable minimal hypersurfaces in a homeomorphic $S^4$ (英語)
[ Abstract ]
Given an $n$-dimensional manifold (with $n$ at least $4$), it is generally impossible to control the topology of a homologically minimizing hypersurface $M$. In this talk, we construct stable (or locally minimizing) hypersurfaces with optimal restrictions on its topology in a $4$-manifold $X$ with natural curvature conditions (e.g. positive scalar curvature), provided that $X$ admits certain embeddings into a homeomorphic $S^4$. As an application, we obtain black hole topology theorems in such $4$-dimensional asymptotically flat manifolds with nonnegative scalar curvature. This is based on joint work with Boyu Zhang.
Ruobing Zhang (University of Wisconsin–Madison) 15:30-16:30
TBA (英語)
[ Abstract ]
TBA