The object of the present paper is to investigate some inclusion relationships and argument properties of several subclasses of multivalent analytic functions, which are defined here by using the Dziok-Srivastava operator. Furthermore, relevant connections of the results presented in this paper with those obtained in earlier works are also pointed out. AMS subject classification: 30C45, 30C50.

In the present paper, we obtain sandwich results involving Hadamard product for certain normalized analytic functions associated with Dziok-Srivastava operator in the open unit disk. Our results extend corresponding previously known results. 2000 Mathematics Subject Classification: Primary 30C45; Secondary 30C80.

In the present investigation, we obtain certain sufficient conditions for a normalized analytic function f(z) defined by the Dziok–Srivastava linear operator Hm1⁄2a1 to satisfy the certain subordination. Our results extend corresponding previously known results on starlikeness, convexity, and close to convexity. 2006 Elsevier Inc. All rights reserved.

In this paper, we introduce new classesB k (a, c, p, , ) and T k (a, c, p, , ) of multivalent analytic functions defined by using the Cho-Kwon-Srivastava operator. We use a strong convolution technique. Inclusion results, a radius problem and some other interesting properties of these classes are discussed.

Making use of Srivastava-Wright operator we introduced a new class of complexvalued harmonic functions with respect to symmetric points which are orientation preserving, univalent and starlike. We obtain coefficient conditions, extreme points, distortion bounds, convex combination. Mathematics subject classification (2010): 30C45.

Making use of the Dziok-Srivastava operator, we introduce a new class of complex valued harmonic functions which are orientation preserving and univalent in the open unit disc and are related to uniformly convex functions. We investigate the coefficient bounds, distortion inequalities and extreme points for this generalized class of functions.

By using a method based upon the Briot-Bouquet differential subordination, we investigate some subordination properties of the generalized fractional integral operator , , 0,z       p    which was defined by Owa, Saigo and Srivastava [1]. Some interesting further consequences are also considered.