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Bull. Korean Math. Soc. 2011; 48(3): 627-636
Printed May 1, 2011
https://doi.org/10.4134/BKMS.2011.48.3.627
Copyright © The Korean Mathematical Society.
Sandwich theorems for higher-order derivatives of $p$-valent functions defined by certain linear operator
Mohamed K. Aouf and Tamer M. Seoudy
Mansoura University, Fayoum University
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
MSC numbers: 30C45
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