A subclass of analytic functions defined by using certain operators of fractional calculus

Making use of certain operators of fractional calculus, we introduce a new class Fδ(n,λ,α) of functions which are analytic in the open unit disk μ and obtain a necessary and sufficient condition for a function to be in the class Fδ(n,λ,α). We also determine the radii of close-to-convexity, starlikeness, and convexity. Finally, an application involving fractional calculus of functions in the class Fδ(n,λ,α) is considered.