关于多元函数的凹凸性  

The Study of Convex and Concave Characteristics of Melti-element Function

作　　者：张文君 孙胜利[2] 

机构地区：[1]商丘技师学院,河南商丘476000 [2]商丘职业技术学院,河南商丘476000

出　　处：《商丘职业技术学院学报》2011年第5期6-7,共2页JOURNAL OF SHANGQIU POLYTECHNIC

摘　　要：将一元函数的凹凸性概念推广到多元函数,给出了多元函数为凸函数或严格凸函数的若干充要条件.The concept of convex and concave characteristics in one - element function was extended to multi - element function. Several causal and necessary conditions were provided, through which multi - element function will be convex function or will strictly be convex function.

关 键 词：凸区域 多元凸(凹)函数 充要条件 

分 类 号：O178[理学—数学]