摘要
本文从凸集入手,着力讨论空间上凸(凹)曲面的几何特征,并给出判定空间上凸函数的几个充要条件。
The article begins with convex set,it makes efforts to discuss thegeometric characteristics of conxex(concaxe) surface in the three dimensionalspace,and gives several necessary and sufficient conditions of concluding the three dimensional convex function.
出处
《宿州学院学报》
2007年第5期93-96,共4页
Journal of Suzhou University
关键词
凸集
凸域
凸函数
上图
Convex set
Convex field
Convex function
Epigraph