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Contributo alla teoria delle funzioni univalenti. - MaRDI portal

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Contributo alla teoria delle funzioni univalenti. (Q2580713)

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Contributo alla teoria delle funzioni univalenti.
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    Contributo alla teoria delle funzioni univalenti. (English)
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    1942
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    Es handelt sich in der Hauptsache um hinreichende Bedingungen dafür, daß eine in \(|\,z\,| < 1\) reguläre Funktion der Klasse der schlichten Funktionen oder gewissen Unterklassen angehört. Die in Satz I und II betrachtete Klasse und einige auf sie bezüglichen Ergebnisse sind nicht neu (vgl. \textit{M. I. S. Robertson}, Ann. Math., Princeton, (2) 37 (1936), 374-408; F.~d.~M. 62\(_{\text{I}}\), 373); es handelt sich um die Klasse \(F\) bei Robertson; dieser hatte an Stelle der Konstanten \(\frac{1}{3}\) in Satz II schon den besseren Wert \(\frac{1}{2}\) angegeben (a. a. O. Theorem 5.04, p. 393).
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