• 제목/요약/키워드: mathematics notes

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NOTES ON THE RUSCHEWEYH DERIVATIVES

  • Cho, Nak-Eun;Kwon, Oh-Sang
    • East Asian mathematical journal
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    • 제6권1호
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    • pp.69-76
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    • 1990
  • 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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