East Asian mathematical journal

  • 제6권1호
  • /
  • Pages.69-76
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  • 1990
  • /
  • 1226-6973(pISSN)
  • /
  • 2287-2833(eISSN)
영남수학회 (The Youngnam Mathematical Society)
권호 표지

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)
  • 발행 : 1990.06.30
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초록

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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