In this article, we are interested in finding sufficient conditions on A , B L , and id="M2"> η which ensure the normalized Coulomb wave function to be Janowski starlike. Sufficient also obtained for id="M3"> g / z ∈ <mi...

Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Let U = {z ∈ C : |z| < 1} be the unit disc in the complex plane.Let Σ k be the class of meromorphic functions f in U having the form: f (z) = 1 z + α k z k + · · · , 0 < |z| < 1, k ≥ 0 A function f ∈ Σ = Σ 0 is called starlike...

it is known that the condition $mathfrak {re} left{zf&apos;(z)/f(z)right}>0$, $|z|