
doi: 10.3792/pjaa.64.331
Let A(p) be the class of functions of the form \(f(z)=z^ p+\sum^{\infty}_{n=p+1}a_ nz^ n\) \((p=1,2,...)\) which are analytic in \(\Delta =(z: | z| 0(z\in \Delta).\) The author's main theorem gives conditions which imply \(| \arg zf'(z)/f(z)| <(\pi /2)\alpha (0<\alpha \leq 1)\) for \(z\in \Delta\). This implies that such a function is p-valently starlike. One of the two assumptions made by the authors is that \(| \arg f'(z)/z^{p-1}| <(\pi /2)\alpha\) for z in \(\Delta\). The other assumption deals with the imaginary part of \(f'(z)/z^{p-1}\) and we do not give it here.
Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.), p-valently starlike, 30C45
Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.), p-valently starlike, 30C45
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