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Certain classes of multivalent functions with negative coefficients involving the Hadamard product

Juma A. R. S.

Journal of Applied Analysis

2012

Vol. 18, nr 1

133-143

In this paper, we introduce and investigate a new class of multivalent functions by using the Hadamard product structure defined in the open unit disk. We obtain coefficient estimates, a distortion theorem, extreme points and criteria of starlikeness and convexity for functions which belong to our class. Relevant connections of the results with those obtained in earlier works are also pointed out.

On meromorphic multivalent functions defined with the use of linear operator

Juma A. R. S.

Journal of Mathematics and Applications

2011

Vol. 34

35-44

In the present paper we introduce two classes of meromorphically multivalent functions and application of linear operators on these classes. We study various properties and coefficients bounds, the concept of neighbourhood also investigated.

Convolution properties of univalent functions defined by generalized Sâlâgean operator

Murugusundaramoorthy G., Juma A. R. S., Kulkarni S. R.

Journal of Mathematics and Applications

2008

Vol. 30

103-112

In our present work we obtained some interesting properties of convolution using the generalized Sâlâgean operator on univalent functions with rnissing coefficients, also we investigate other results by making use of subordination concept.