摘要
基于对数凹函数的迷向的定义,给出了对数凹函数迷向的3个条件,并证明了等价性.进一步地,给出了一个非凸体特征函数的迷向对数凹函数,并计算了其迷向常数.
Based on the definition of the isotropy for the log-concave functions,we study some equivalence conditions to verify whether a log-concave function f is isotropic.Moreover,we show that there exists an isotropic log-concave function besides the characteristic function,and compute its isotropic constant.
作者
平小芳
PING Xiaofang(Zhejiang Post and Telecommunication College,Shaoxing 312016,Zhejiang Province,China)
出处
《应用数学与计算数学学报》
2018年第4期955-958,共4页
Communication on Applied Mathematics and Computation
关键词
对数凹函数
函数迷向
函数的迷向常数
log-concave function
isotropic function
isotropic constant for func-tions
