M-quasi-hyponormal composition operators
type: Item
instance of: scholarly article
title: M-quasi-hyponormal composition operators
zbMATH Open document ID: 0633.47013
DOI: 10.1155/S0161171287000760
author: B. George
published in: International Journal of Mathematics and Mathematical Sciences
publication date: 1987-01-01T00:00:00Z
full work available at URL: https://eudml.org/doc/46241
review text: A necessary and sufficient condition is obtained for M-quasi-hyponormal composition operators. It has also been proved that the class of M-quasi- hyponormal composition operators coincides with the class of m-paranormal composition operators. Existence of M-hyponormal composition operators which are not hyponormal: and M-quasi-hyponormal composition operators which are not M-hyponormal and quasi-hyponormal are also shown.
Mathematics Subject Classification ID: 47B20
zbMATH DE Number: 4030296
zbMATH Keywords: composition operators
zbMATH Keywords: M-hyponormal composition operators which are not hyponormal
zbMATH Keywords: M-quasi-hyponormal composition operators which are not M- hyponormal and quasi-hyponormal
MaRDI profile type: Publication
OpenAlex ID: W2156146122
description: scientific article; zbMATH DE number 4030296