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- Saeid Shams, Smita R. Kulkarni, Jay M. Jahangiri
- Int. J. Math. Mathematical Sciences
- 2004

Some classes of uniformly starlike and convex functions are introduced. The geometrical properties of these classes and their behavior under certain integral operators are investigated. 1. Introduction. Let A denote the class of functions of the form f (z) = z+ ∞ n=2 a n z

- Jay M. Jahangiri, Samaneh G. Hamidi
- Int. J. Math. Mathematical Sciences
- 2013

In this paper we introduce some new subclasses of the class σ of bi-univalent functions and obtain bounds for the initial coefficients of the Taylor series expansion of functions from the considered classes.

- Om P. Ahuja, Jay M. Jahangiri, Herb Silverman
- Appl. Math. Lett.
- 2003

Ruscheweyh‘and She&Small proved the P6lya-Schoenberg conjecture that the class of convex analytic functions is closed under convolution or Hadamard product. They also showed that clos&o-convexity is preserved under convolution with convex analytic functions. In this note, we investigate harmonic analogs. Beginning with convex analytic functions, we form… (More)

- JAY M. JAHANGIRI
- 2004

Sufficient coefficient conditions for complex functions to be close-to-convex harmonic or convex harmonic are given. Construction of close-to-convex harmonic functions is also studied by looking at transforms of convex analytic functions. Finally, a convolution property for harmonic functions is discussed. Harmonic, Convex, Close-to-Convex, Univalent.

- Saeid Shams, Smita R. Kulkarni, Jay M. Jahangiri
- Int. J. Math. Mathematical Sciences
- 2006

By applying certain integral operators to p-valent functions we define a comprehensive family of analytic functins. The subordinations properties of this family is studied, which in certain special cases yield some of the previously obtained results.

- Jay M. Jahangiri, Kambiz Farahmand
- Int. J. Math. Mathematical Sciences
- 2004

In [6] it was shown that if f ∈ is starlike of order α, α= 0.294, . . . , so is the Libera integral operator F . We also know that (see, e.g., [1]) there are functions which are univalent or spiral-like in so that their Libera integral operators are not univalent or spiral-like in . Li and Owa [5] proved that if f ∈ is univalent in , then Fn(z) is starlike… (More)

- Reza Kiani Mavi, Sajad Kazemi, Jay M. Jahangiri
- J. Applied Mathematics
- 2013

- Samaneh G. Hamidi, Suzeini Abdul Halim, Jay M. Jahangiri
- Int. J. Math. Mathematical Sciences
- 2013

License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. We consider meromorphic starlike univalent functions that are also bi-starlike and find Faber polynomial coefficient estimates for these types of functions. A function is said to be bi-starlike if both the function and its… (More)

We define and investigate a new class of Sǎlǎgean-type harmonic multivalent functions. we obtain coefficient inequalities, extreme points and distortion bounds for the functions in this class. 2000 Mathematics Subject Classification: 30C45, 30C50, 31A05.