摘要
本文证明张玉忠同志在“弱Lipschitz函数、它的广义次梯度及其在优化中的应用”一文中定义的广义次梯度f(π),当n≥2时即为R ̄n,因此这种广义次梯度是没有多少应用价值的。
This paper shows that the notion of generalized subgradient of weak Lipschitz functions as defined by Zhang Yuzhong in his paper which appeared in this journal vol.21,no.4,1992 happens to be merely that =R ̄n when n≥2. Accordingly,it does not bring forth any new significance.
出处
《数学进展》
CSCD
北大核心
1995年第6期556-557,共2页
Advances in Mathematics(China)
关键词
广义次梯度
弱李普希兹函数
最佳化
weak Lipschitz functions
generalized subgradient
convex hull