In this paper the classes of uniformly convex and uniformly starlike functions are Ε½ presented as dual sets for certain function families in the sense of convolution . theory . The results are used to find some sharp sufficient conditions for functions, regular in the unit disk, to belong to the abo
Applications of fractional calculus to parabolic starlike and uniformly convex functions
β Scribed by H.M. Srivastava; A.K. Mishra
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 566 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0898-1221
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β¦ Synopsis
Let A be the class of analytic functions in the open unit disk U. Given 0 ~ A < 1, let ~x be the operator defined on ,4 by
where D~I is the fractional derivative of f of order A. A function f in ,4 is said to be in the class SPx if ~Af is a parabolic starlike function. In this paper, several basic properties and characteristics of the class SPA are investigated. These include subordination, inclusion, and growth theorems, clarapreserving operators, Fekete-Szeg6 problems, and sharp estimates for the first few coefficients of the inverse function.
π SIMILAR VOLUMES
main object of the present paper is to derive several sufficient conditions for close-to-convexity, starlikeness, and convexity of certain (normalized) analytic functions. Relevant connections of some of the results obtained in this paper with those in earlier works are also provided.
The authors apply certain operators of fractional calculus (that is, integrals and derivatives of an arbitrary real or complex order) with a view to deriving various families of bilateral expansions associated with functions of several variables. They also present relevant connections of the bilater