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Le Matematiche 2012
Some differential subordination and superordination properties of symmetric analytic functions involving Noor integral operatorKeywords: Analytic functions , Convex functions , Symmetric functions , Differential subordination and superordination , Noor integral operator Abstract: In this paper, we obtain some interesting properties of differential subordination and superordination for the classes of symmetric functions analytic in the unit disc, by applying Noor integral operator. We investigate several sandwich theorems on the basis of this theory.
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