Bulletin of the
Korean Mathematical Society
BKMS

ISSN(Print) 1015-8634 ISSN(Online) 2234-3016

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Bull. Korean Math. Soc. 2011; 48(3): 647-653

Printed May 1, 2011

https://doi.org/10.4134/BKMS.2011.48.3.647

Copyright © The Korean Mathematical Society.

A note on hyponormal Toeplitz operators

An-Hyun Kim

Changwon National University

Abstract

In this note we are concerned with the hyponormality of Toeplitz operators $T_\phi$ with polynomial symbols $\phi=\bar g+f$ $(f,g\in H^\infty(\Bbb{T}))$ when $g$ divides $f$.

Keywords: Toeplitz operators, hyponormal

MSC numbers: Primary 47B20, 47B35