Symmetry, Vol. 15, Pages 1124: Radius Results for Certain Strongly Starlike Functions

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Symmetry, Vol. 15, Pages 1124: Radius Results for Certain Strongly Starlike Functions

Symmetry doi: 10.3390/sym15051124

Authors:
Afis Saliu
Kanwal Jabeen
Qin Xin
Fairouz Tchier
Sarfraz Nawaz Malik

This article comprises the study of strongly starlike functions which are defined by using the concept of subordination. The function φ defined by φ(ζ)=(1+ζ)λ, 0<λ<1 maps the open unit disk in the complex plane to a domain symmetric with respect to the real axis in the right-half plane. Using this mapping, we obtain some radius results for a family of starlike functions. It is worth noting that all the presented results are sharp.

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