Convolution, coefficient and radius problems of certain univalent functions [QA331. M231 2009 f rb].

Dengan menggunakan ciri-ciri konvolusi dan teori subordinasi, beberapa subkelas fungsi meromorfi diperkenalkan. By making use of the properties of convolution and theory of subordination, several subclasses of meromorphic functions are introduced

Connections between Certain Subclasses of Analytic Univalent Functions Based on Operators

In this paper, by applying the Hohlov linear operator, connections between the class SD

The Generalized Janowski Starlike and Close-to-Starlike Log-Harmonic Mappings

Motivated by the success of the Janowski starlike function, we consider here closely related functions for log-harmonic mappings of the form ()=ℎ()() defined on the open unit disc . The functions are in the class of the generalized Janowski starlike log-harmonic mapping, ∗lh(,,), with the functional ℎ() in the class of the generalized Janowski starlike functions, ∗(,,). By means of these functions, we obtained results on the generalized Janowski close-to-starlike log-harmonic mappings, lh(,,)

Fekete-Szegö Problems for Quasi-Subordination Classes

An analytic function f is quasi-subordinate to an analytic function g, in the open unit disk if there exist analytic functions φ and w, with |φ(z)|≤1, w(0)=0 and |w(z)|<1 such that f(z)=φ(z)g(w(z)). Certain subclasses of analytic univalent functions associated with quasi-subordination are defined and the bounds for the Fekete-Szegö coefficient functional |a3-μa22| for functions belonging to these subclasses are derived

Differential Subordination and Superordination for Srivastava-Attiya Operator

Due to the well-known Srivastava-Attiya operator, we investigate here some results relating the p-valent of the operator with differential subordination and subordination. Further, we obtain some interesting results on sandwich-type theorem for the same