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Original Articles

On the boundary of convexity of univalent functions class in half‐plane

Pages 79-82 | Received 14 Oct 2001, Published online: 14 Oct 2010
 

Abstract

In this article we establish the maximum radius of the disc which any univalent in the half‐plane function maps onto a convex domain.

Straipsnyje nustatomas maksimalus spindulys skritulio, kuri visos vienalapes ir normuotos pusplokštumeje funkcijos atvaizduoja i iškilaja sriti. Tegul K(D) poklase analiziniu srityje D funkciju klases. Maksimalu skaičiu R(Z 0) toki, kad visos funkcijos iš K(D) atvaizduoja skrituli su centru taške z0 ir spinduliu R(z 0) i iškiliaja sriti, vadinsime klases K(D) iškilumo spinduliu taško z0 atžvilgiu. Iškilumo spindulio problema buvo keliama ivairioms analiziniu funkciju vienetiniame skritulyje poklasems. Šiame straipsnyje nustatomas vienalapiu ir normuotu (F(1) = 0, F'(1) = 1) pusplokštumeje II = {Rez > 0} funkciju klases iškilumo spindulys taško z 0 atžvilgiu.

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