Integral estimates for derivatives of univalent functions
Brennan’s conjecture for a conformal mapping f of the unit disk is proved under a certain condition on the Taylor coefficients of ln f ′. Brennan’s conjecture is also proved in the case where 1/ f ′ expands into a series of simple fractions absolutely converging to zero. An estimate for the approxim...
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Veröffentlicht in: | Lobachevskii journal of mathematics 2014-10, Vol.35 (4), p.402-408 |
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Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | Brennan’s conjecture for a conformal mapping
f
of the unit disk is proved under a certain condition on the Taylor coefficients of ln
f
′. Brennan’s conjecture is also proved in the case where 1/
f
′ expands into a series of simple fractions absolutely converging to zero. An estimate for the approximation of 1/
f
′ by simple fractions is obtained. |
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ISSN: | 1995-0802 1818-9962 |
DOI: | 10.1134/S1995080214040052 |