Sandwich results for subclasses of multivalent meromorphic functions associated with iterations of the Cho-Kwon-Srivastava transform

Abstract

In this paper we obtain subordination, superordination and sandwich results for multivalent meromorphic functions, involving the iterations of the Cho-Kwon-Srivastava operator and its combinations. Certain interesting particular cases are also pointed out. ∞ k=1 a k−p z k−p (p ∈ N := {1, 2, 3,. .. }) (2) which are analytic in the punctured unit disc U := U \ {0}. Suppose that f and F are analytic in H. We say that f is subordinate to F, (or F is superordinate to f), write as f ≺ F in U or f (z) ≺ F(z)

Sandwich Subordinations Imposed by New Generalized Koebe-Type Operator on Holomorphic Function Class

“…In effect, interesting recent studies have emanated about dealing with subordinate and superordinate techniques and sandwiches problems correlated with numerous complex operators, for instance, Atshan et al [17], Sokół et al [18], Zayed and Bulboacă [19], Al-Janaby and Ahmad [20], Mishra and Soren [21], Al-Janaby and Darus [22], Al-Janaby et al ( [23], [24]), Ghanim and Al-Janaby ( [25], [26]), Attiy ([27], [28]), Lupaş and Oros [29] and Atshan ( [30], [31]).…”