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Extremal quasiconformality vs bounded rational approximation

We show that, on most of the hyperbolic simply connected domains, the weighty bounded rational approximation in a natural sup norm is possible only for a very sparse set of holomorphic functions (in contrast to the integral approximation). The obstructions are caused by the features of extremal quas...

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Bibliographic Details
Main Author: Krushkal, S.L.
Format: Article
Language:English
Published: Інститут прикладної математики і механіки НАН України 2019
Series:Український математичний вісник
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/169439
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Summary:We show that, on most of the hyperbolic simply connected domains, the weighty bounded rational approximation in a natural sup norm is possible only for a very sparse set of holomorphic functions (in contrast to the integral approximation). The obstructions are caused by the features of extremal quasiconformality.