Radius problem for the class of analytic functions based on Ruscheweyh derivative
DOI:
https://doi.org/10.22199/issn.0717-6279-2019-03-0034Keywords:
Analytic function, Univalent function, Ruscheweyh derivative, Cauchy-Schwarz inequality, Radius problema, Hölder inequalityAbstract
Let ? be the class of analytic functions f (z) with the normalized condition f(0) = f 0(0)−1 = 0 in the open unit disk U. Bymaking use of Ruscheweyh derivative operator, a new subclass ?(β1, β2, β3, β4; λ) of f(z) ∈ ? satisfying the inequalityReferences
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