摘要
从函数的上凸或下凸的定义出发，给出了函数凸性的四个定理，并说明了应用的简洁性．
Four theorems of functional Protrusion are obtained from the upper or lower function-al protrusions. The application explicity is also developed.
出处
《商洛学院学报》
1999年第2期34-36,共3页
Journal of Shangluo University
关键词
上凸
下凸
凸性定理
upper protrusion, lower protrusion, protrusion theorems
