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SANDWICH THEOREMS FOR HIGHER-ORDER DERIVATIVES OF p-VALENT FUNCTIONS DEFINED BY CERTAIN LINEAR OPERATOR

  • Aouf, Mohamed K. ;
  • Seoudy, Tamer M.
  • Received : 2009.10.22
  • Published : 2011.05.31

Abstract

In this paper, we obtain some applications of first order differential subordination and superordination results for higher-order derivatives of p-valent functions involving certain linear operator. Some of our results improve and generalize previously known results.

Keywords

analytic function;Hadamard product;differential subordination;superordination;linear operator

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Cited by

  1. Sandwich theorems for higher-order derivatives of $$p$$ -valent functions defined by certain linear operator vol.25, pp.2, 2014, https://doi.org/10.1007/s13370-012-0127-1