用单侧导数和对称导数结合的方式研究函数的凸性  

Functional Convex Discussed by The Associated Mode of One-sided Derivative with Symmetric Derivative

作　　者：张广计[1] 

机构地区：[1]西北政法大学,710063

出　　处：《中国科技信息》2009年第11期63-64,共2页China Science and Technology Information

摘　　要：把单侧导数与对称导数结合起来,以更弱的条件讨论函数的凸性,给出了凸函数的一个充要条件。It associates one-sided derivative with symmetric derivative to discuss the functional convex, whose condition is weaker than present reference. As a result, It gives a necessary and sufficient condition for convex function.

关 键 词：单侧导数 对称导数 凸函数 

分 类 号：O172.1[理学—数学]