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：1991
卷号：14
DOI：10.1155/S0161171291000856
出版社：Hindawi Publishing Corporation
摘要：A new subclass R(α), 0≤α≤1, of the class St(1/2) the class of
starlike functions of order 1/2 is introduced and it is shown that R(α) is closed
with respect to the Hadamard product of analytic functions. Some sufficient
conditions for the normalized regular functions to be univalent in the unit disk E are
given.
