Title: Diffeomorphism classification of simply connected 3 dimensional Mori fiber spaces

Speaker: 苏阳（中国科学院数学与系统科学研究院）

Time: Wednesday, October 29, 2025, 14:30--15:30

Venue: Room 315, Gewu Building

Abstract: Mori fiber spaces form a special class of complex projective varieties. They appear naturally in the minimal model program. In this talk I will describe a diffeomorphism classification of 3 dimensional simply connected Mori fiber spaces. This is based on the knowledge of the classification of simply connected 6-manifolds. Interestingly, the diffeomorphism types of these objects are determined by algebro-topological and algebro-geometrical numerical invariants such the Euler characteristic, the holomorphic Euler characteristic, the cube of the canonical divisor, etc. This is a joint work with HAO Feng and YANG Jianqiang.