汇报标题 (Title)：Suitable binary compositions and transformations on spheres（球上相宜的二元组合和变换）
汇报人 (Speaker)：国起 教授（信阳科技大学）
汇报功夫 (Time)：2023年11月9日(周四) 10:00
汇报地址 (Place)：校本部GJ406
约请人(Inviter)：席东盟、李晋、张德凯
主办部门：理学院数学系
汇报提要：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.
