APPLICATION OF SUBORDINATION AND RUSCHEWEYH DERIVATIVE FOR p-VALENT FUNCTIONS WITH NEGATIVE COEFFICIENTS

摘要

Let A_p(A, B, α, λ) be the class of functions f ∈ D (δ, β, λ, ρ) of the form: f(z) = z~p- ∑_(k=p+1)~ ∝ a_k z~k, a_k ≥ 0,p ∈N = {1,2,3,......} which are analytic and p-valent in the unit disk U and satisfying. |(z(D~(λ+p-1))f(z))'/(D~(λ+p-1)f(z))-p/(pB+(A-