On subordination-preserving theorem

Abstract: Let denote the class of analytic functions in the unit disc on the complex plane . If the operator satisfiesfor all , then it is called subordination-preserving operator on the class . In this paper we present a new result of this form which generalize some of the earlier and is connected with the Wilf’s conjecture. The applications of main result are also presented. [Copyright &y& Elsevier]