Cartesian form of Putnam's inequality for doubly commuting hyponormal \(n\)-tuples
type: Item
instance of: scholarly article
zbMATH Open document ID: 0982.47021
author: Raúl E. Curto
author: Muneo Chō
author: Tadasi Huruya
author: Wiesław Tadeusz Żelazko
published in: Indiana University Mathematics Journal
publication date: 2001-08-12T00:00:00Z
Mathematics Subject Classification ID: 47B20
Mathematics Subject Classification ID: 47A13
zbMATH DE Number: 1633098
zbMATH Keywords: hyponornal operators
zbMATH Keywords: Putnam's inequality
zbMATH Keywords: joint approximate point spectra
zbMATH Keywords: doubly commuting hyponormal \(n\)-tuples
zbMATH Keywords: Xia spectra
zbMATH Keywords: Taylor and Xia spectra
MaRDI profile type: Publication
full work available at URL: iumj.2000.49.1766
OpenAlex ID: W2094837588
DOI: 10.1512/IUMJ.2000.49.1766
title: Cartesian form of Putnam's inequality for doubly commuting hyponormal \(n\)-tuples
review text: The authors give some Cartesian form of Putnam's inequality bounded by the area of the joint approximate point spectra for doubly commuting hyponormal \(n\)-tuples by using the inequality bounded by the area of the Xia spectra for semi-hyponormal \(n\)-tuples of operators given by Xia and give also some relation between the Taylor and Xia spectra of such \(n\)-tuples.
reviewed by: Takashi Yoshino
description: scientific article; zbMATH DE number 1633098