Some properties of a class of generalized Janowski-type $q$-starlike functions associated with Opoola $q$-differential operator and $q$-differential subordination

Year 2024, Volume: 73 Issue: 2, 349 - 364, 21.06.2024

Ayotunde Lasode , Timothy Opoola

https://doi.org/10.31801/cfsuasmas.1281348

Abstract

Without qualms, studies show that quantum calculus has received great attention in recent times. This can be attributed to its wide range of applications in many science areas. In this exploration, we study a new qdifferential operator that generalized many known differential operators. The new q-operator and the concept of subordination were afterwards, used to define a new subclass of analytic-univalent functions that invariably consists of several known and new generalizations of starlike functions. Consequently, some geometric properties of the new class were investigated. The properties include coefficient inequality, growth, distortion and covering properties. In fact, we solved some radii problems for the class and also established its subordinating factor sequence property. Indeed, varying some of the involving parameters in our results led to some existing results.

Keywords

Analytic function, univalent function, Schwarz function, Janowski $q$-starlike function, subordination, radius problem, distortion theorem, growth theorem, covering theorem, coefficient inequality, subordinating factor sequence, Opoola $q$-differential operator

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