报告题目：Finsler warped product metrics

报 告 人：莫小欢

时 间：2019年3月27日（周三）上午8:50-9:50

地 点：六号楼二楼报告厅

简 介： In this lecture we discuss the warped structures of Finsler metrics. We obtain the differential equation that characterizes the Finsler warped product metrics with vanishing Douglas curvature. By solving this equation, we obtain all Finsler warped product Douglas metrics. Some new Douglas Finsler metrics of this type are produced by using known spherically symmetric Douglas metrics. We also refine and improve Chen-Shen-Zhao equations characterizing Finsler warped product metrics of scalar flag curvature. In particular， we find equations that characterize Finsler warped product metrics of constant flag curvature. Then we improve Chen-Shen-Zhao result on characterizing Einstein Finsler warped product metrics. As its application we construct explicitly many new warped product Douglas metrics of constant Ricci curvature by using known locally projectively flat spherically symmetric metrics of constant flag curvature.

报告题目：On upper bounds for algebraic degrees of APN functions

报 告 人：李念

时 间：2019年3月22日（周五）上午11: 30-12:00

地 点：六号楼二楼报告厅

简 介：

报告题目：Constructions of involutions over finite fields

报 告 人：郑大彬

时 间：2019年3月22日（周五）上午11:00-11:30

地 点：六号楼二楼报告厅

简 介：