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Differential subordinations using ruscheweyh derivative and Sălăgean operator
(Işık University Press, 2014)In the present paper we study the operator defined by using the Ruscheweyh derivative Rm f(z) and the Sălăgean operator Sm f(z), denoted Lmα : An → An, Lmα f(z) = (1−α)Rm f(z)+αSm f(z), z ∈ U, where An = {f ∈ H(U) : f(z) ...