中科院数学与系统科学研究院
数学研究所
微分几何研讨班
报告人：Prof. Shin-ichi Matsumura(Tohoku University)
题 目：Projective klt pairs with nef anti -canonical divisor and RC fibrations
时 间：2018.08.29（星期三）, 10:00-11:00
地 点：数学院南楼N820室
摘 要：The famous result of Kollar-Miyaoka-Mori and Campana says that any Fano variety is rationally connected. Hacon-McKernan gave a conjecture which asks a relation between the geometry of rational curves and positivity of nef anti-canonical bundle for projective manifolds with klt singularities. Ejiri-Gongyo recently proved Hacon-McKernan's conjecture. In this talk, I will give a sharper inequality than the conjecture posed by Hacon-McKernan and proved by Ejiri-Gongyo, by using positively curved singular hermitian metrics on direct image sheaves.This is a joint work with Junyan Cao (Institut de Mathematiques de Jussieu).
