Univalence of normalized solutions of W″(z)+p(z)W(z)=0

Abstract

Denote solutions of W″(z)+p(z)W(z)=0 by Wα(z)=zα[1+∑n=1∞anzn] and Wβ(z)=zβ[1+∑n=1∞bnzn], where 0<ℛ(β)≤1/2≤ℛ(α) and z2p(z) is holomorphic in |z|<1. We determine sufficient conditions on p(z) so that [Wα(z)]1/α and [Wβ(z)]1/β are univalent in |z|<1.

Keywords

• univalent
• spirallike
• starlike.