期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：1989
卷号：12
DOI：10.1155/S0161171289000244
出版社：Hindawi Publishing Corporation
摘要：The object of the present paper is to show the extreme points of the class
A(n,Bk) consisting of analytic functions with negative coefficients and the support
points of the subclass A *(n,Bk) of A(n,Bk).
