East Asian mathematical journal

The Youngnam Mathematical Society (영남수학회)
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NOTES ON THE RUSCHEWEYH DERIVATIVES

  • Cho, Nak-Eun (Department of Applied Mathematics National Fisheries University of Pusan) ;
  • Kwon, Oh-Sang (Department of Mathematics Kyung Sung University)
  • Published : 1990.06.30
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Abstract

We introduce the classes S*(n, a) and K(n, a) of analytic functions by using the symbol $D^af(z)$ defined by $\frac{z}{(1-z)^{1+a}}*f(z)\;(a\geq-1)$. The object of the present paper is to derive some properties of these classes.

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