… Now we introduce the class Tγ(λ, β, α, µ, cm) as a subclass of Tγ(λ, β, α, µ) with fixed
finitely many negative coefficients of the form: … Other authors such as [2] and [3] also
investigated some geometric properties of certain subclasses of univalent functions. In order
to establish our results in this current work therefore, we use 2.1. … analytic functions
defined by using sigmoid function, Advances in Mathematics: Scientific …