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The minimal distance of the image boundary from the origin and the second coefficient of a univalent function in $$| z| < 1$$. (English) Zbl 0186.39703

##### Keywords:
complex functions
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##### References:
 [1] Lewin, M., On a coefficient problem for bi-univalent functions. Proc. Amer. Math. Soc. 18, 63–68 (1967). · Zbl 0158.07802 · doi:10.1090/S0002-9939-1967-0206255-1 [2] Loewner, C., Untersuchungen über schlichte konforme Abbildungen des Einheitskreises, I. Math. Annalen 89, 103–121 (1923). · JFM 49.0714.01 · doi:10.1007/BF01448091 [3] Nehari, Z., Conformal Mapping. McGraw-Hill 1952. [4] Schiffer, M., Hadamard’s formula and the variation of domain functions. Amer. J. Math. 68, 417–448 (1946). · Zbl 0060.23706 · doi:10.2307/2371824
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