An Application of Jackson's $(p,q)$-Derivative to a Subclass of Starlike Functions with Negative Coefficients

Feras Yousef, Amal Al-Shible, Sibel Yalçın

In this paper, we introduce and investigate the subclass ${\mathcal{P}}_{p,q}^{\xi ,\kappa }(\tau ,\eta )$ of starlike functions with negative coefficients by using the differential operator $Υ_{τ,p…