Essential norm of generalized integral type operator from QK(p,q) to Zygmund spaces

Author:

Manavi Ayyoub1,Hassanlou Mostafa2,Vaezi Hamid3

Affiliation:

1. Department of Mathematics, Sarab Branch, Islamic Azad University, Sarab, Iran

2. Engineering Faculty of Khoy, Urmia University of Technology, Urmia, Iran

3. Faculty of Mathematics, Statistics and Computer Sciences, University of Tabriz, Tabriz, Iran

Abstract

Let ? be an analytic self-map on D, n ? N and 1 ? H(D). We consider the essential norm of the generalized integral-type operator Cn ?,g : QK (p,q) ? Z? that is defined as follows (Cn ?,g f) (z) = ?z0 f(n)(?(?))1(?) d?, for all f ? QK (p,q). We give an estimate for the essential norm of the above operator.

Publisher

National Library of Serbia

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