报告地点：会议 ID： 661 466 888  (腾讯会议)

报告人： 李铎 副教授（中山大学-珠海分校）

报告摘要：Assume that Y is the blowing up of a smooth projective variety X along a smooth center B and Y also admits a projective bundle structure over a variety Z. If B is a point, we show that X is a projective space and the projective bundle structure is given by the linear projection from B. If the Picard number of X is 1, then dim Z is at least n-dim B-1. Moreover, if dim Z is n-dim B-1, then X is a projective space and B is a linear subspace in X. As an application, we show that if X is a projective space and B is a curve, then B is necessarily a line.

邀请人：顾怡