On Janowski harmonic functions

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Abstract
In this paper we define classes of harmonic functions related to the Janowski functions and we give some necessary and sufficient conditions for these classes. Some topological properties and extreme points of the classes are also considered. By using extreme points theory we obtain coefficients estimates, distortion theorems, integral mean inequalities for the classes of functions.
Funding Information
  • by the Centre for Innovation and Transfer of Natural Sciences and Engineering Knowledge, University of Rzeszów