报告题目 (Title)：Suitable binary compositions and transformations on spheres（球上合适的二元组合和变换）

报告人 (Speaker)：国起 教授（苏州科技大学）

报告时间 (Time)：2023年11月9日(周四) 10:00

报告地点 (Place)：校本部GJ406

邀请人(Inviter)：席东盟、李晋、张德凯

主办部门：理学院数学系

报告摘要：In this talk, we introduce first some practical pointwise or set-wise binary compositions and suitable transformations on spheres, and then, in terms of these binary compositions and transformations, we study the combinatoric and structural properties of spherically convex sets. The basic properties of spherically convex functions, such as the Lipschitz continuity and the criterions of convexity of spherically convex functions will also be discussed.