For real $$\alpha $$α and $$\beta $$β such that $$0 \le \alpha { Click to show full abstract
For real $$\alpha $$α and $$\beta $$β such that $$0 \le \alpha {<} 1 {<} \beta $$0≤α<1<β, we denote by $$\varSigma _{s}(\alpha ,\beta )$$Σs(α,β) and $$\varSigma _{c}^{0}(\alpha ,\beta )$$Σc0(α,β) the class of meromorphic univalent functions f such that $$\alpha < Re \left\{ zf'(z)/f(z) \right\} {<} \beta $$α
               
Click one of the above tabs to view related content.