doi:10.1155/2007/14630 Research Article On Janowski Starlike Functions

For analytic functions f (z) in the open unit disc U with f (0) = 0 and f ′(0) = 1, applying the fractional calculus for f (z), a new fractional operator Dλ f (z) is introduced. Further, a new subclass ∗λ (A,B) consisting of f (z) associated with Janowski function is defined. The objective of the present paper is to discuss some interesting properties of the class ∗λ (A,B). Copyright © 2007 M. Çag̃lar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 1. Introduction an