نتایج جستجو برای: starlike functions

تعداد نتایج: 490958  

2007
OM P. AHUJA G. MURUGUSUNDARAMOORTHY N. MAGESH

Making use of the generalized hypergeometric functions, we introduce some generalized class of k−uniformly convex and starlike functions and for this class, we settle the Silverman’s conjecture for the integral means inequality. In particular, we obtain integral means inequalities for various classes of uniformly convex and uniformly starlike functions in the unit disc.

‎In the present investigation‎, ‎we give the best estimates for the norm of the pre-Schwarzian derivative $ T_{f}(z)=dfrac{f^{''}(z)}{f^{'}(z)} $ for bi-starlike functions and a new subclass of bi-univalent functions of order $ alpha $‎, ‎where‎ ‎$Vert T_{f} Vert= sup_{|z|

Journal: :نظریه تقریب و کاربرد های آن 0
mohammad taati department of mathematics, payame noor university, p.o.box 19395-3697, tehran, iran.

in this paper we introduce and investigate a certain subclass of univalentfunctions which are analytic in the unit disk u.such results as coecientinequalities. the results presented here would provide extensions of those givenin earlier works.

Journal: :Journal of Inequalities and Applications 2007

Journal: :Transactions of the American Mathematical Society 1963

Journal: :Pacific Journal of Mathematics 1963

Journal: :Bulletin of the Australian Mathematical Society 1984

Journal: :Colloquium Mathematicum 1986

In this paper, we introduced and investigated starlike and convex functions of order α with respect to 2(j,k)-symmetric conjugate points and coefficient inequality for function belonging to these classes are provided . Also we obtain some convolution condition for functions belonging to this class.

Journal: :Applied Mathematics and Computation 2010
R. Chandrashekar Rosihan M. Ali See Keong Lee V. Ravichandran

It is well-known that the classes of starlike, convex and close-to-convex univalent functions are closed under convolution with convex functions. In this paper, closure properties under convolution of general classes of meromorphic p-valent functions that are either starlike, convex or close-to-convex with respect to n-ply symmetric, conjugate and symmetric conjugate points are investigated. 20...

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