
Let \(f\) be analytic in the unit disk \(D\) and \(M(r,f)=\max\{| f(z)|\mid| z|= r\}\) for \(r\in (0,1)\). In this paper the author describes the very delicate construction of a function \(f\) and a sequence \((r_ n)_{n\in\mathbb{N}}= (r_ n(f))_{n\in\mathbb{N}}\) with the following properties: 1) \(f(0)= f'(0)- 1=0\), \(f\) is starlike in \(D\), 2) \(r_ n\in (0,1)\), \(\lim_{n\to\infty} r_ n=1\), for any \(n\in\mathbb{N}\), \({d^ 2\over dr^ 2} M(r_ n,f)= M''(r_ n,f)\) exists and \[ \lim_{n\to\infty} {(1- r_ n)^ 2 M''(r_ n,f)\over M(r,f)}= \infty. \] Compare: 1) \textit{T. Sheil-Small} [Proc. Lond. Math. Soc., III. Ser. 21, 577-613 (1970; Zbl 0205.383)]; 2) the author [Bull. Lond. Math. Soc. 13, 207-213 (1981; Zbl 0448.30014)].
Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.), Extremal problems for conformal and quasiconformal mappings, other methods, starlike function, regular and starlike in the unit disc, order, maximum modules
Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.), Extremal problems for conformal and quasiconformal mappings, other methods, starlike function, regular and starlike in the unit disc, order, maximum modules
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 1 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
