Sharp estimation of even coefficients of bounded symmetric univalent functions
Z. J. Jakubowski, A. Zielińska, K. Zyskowska (1983)
Annales Polonici Mathematici
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Z. J. Jakubowski, A. Zielińska, K. Zyskowska (1983)
Annales Polonici Mathematici
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A. Zielińska, K. Zyskowska (1983)
Annales Polonici Mathematici
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Julian Ławrynowicz, Olli Tammi (1972)
Colloquium Mathematicae
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Zyskowska, Krystyna (2015-12-08T12:39:07Z)
Acta Universitatis Lodziensis. Folia Mathematica
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Zyskowska, Krystyna (2015-11-13T12:12:57Z)
Acta Universitatis Lodziensis. Folia Mathematica
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Wiesław Majchrzak (1977)
Annales Polonici Mathematici
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J. Śladkowska (1998)
Annales Polonici Mathematici
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Szwankowaki, Andrzej (2015-11-13T12:50:52Z)
Acta Universitatis Lodziensis. Folia Mathematica
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Szwankowski, Andrzej (2015-12-18T19:21:18Z)
Acta Universitatis Lodziensis. Folia Mathematica
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Larisa Gromova, Alexander Vasil'ev (1996)
Annales Polonici Mathematici
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The functional |c₄ + pc₂c₃ + qc³₂| is considered in the class of all univalent holomorphic functions in the unit disk. For real values p and q in some regions of the (p,q)-plane the estimates of this functional are obtained by the area method for univalent functions. Some new regions are found where the Koebe function is extremal.
O. Tammi (1967)
Colloquium Mathematicae
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Tăut, Adela Olimpia, Oros, Georgia Irina, Şendruţiu, Roxana (2008)
Banach Journal of Mathematical Analysis [electronic only]
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Ma, William, Minda, David (1997)
Annales Academiae Scientiarum Fennicae. Mathematica
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J. Śladkowska (1996)
Annales Polonici Mathematici
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The paper is devoted to a class of functions analytic, univalent, bounded and non-vanishing in the unit disk and in addition, symmetric with respect to the real axis. Variational formulas are derived and, as applications, estimates are given of the first and second coefficients in the considered class of functions.
Richard J. Libera, Eligiusz Złotkiewicz (1988)
Colloquium Mathematicae
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J. T. Poole (1968)
Annales Polonici Mathematici
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Józef Baranowicz (1976)
Annales Polonici Mathematici
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M. Obradović (1985)
Matematički Vesnik
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K. S. Padmanabhan, R. Bharati (1983)
Annales Polonici Mathematici
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Pałka, Janina (2015-11-10T12:14:29Z)
Acta Universitatis Lodziensis. Folia Mathematica
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Wiesław Majchrzak (1979)
Annales Polonici Mathematici
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