Rouche type theorems and a theorem of Adamyan, Arov and Krein

Autores: T. Nakazi
Localización: Mathematica scandinavica, ISSN 0025-5521, Vol. 97, Nº 1, 2005, págs. 154-160
Idioma: inglés
DOI: 10.7146/math.scand.a-14969
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Resumen
- We show Rouché type theorems using a theorem of Adamyan, Arov and Krein. As applications, we obtain a certain characterization of self-maps of the unit disc in terms of the location of the Denjoy-Wolf point and we study a function in the Smirnov class whose real part is positive.