Defect basis property of the eigenvectors of a selfadjoint operator- valued function and formula for defect
type: Item
instance of: scholarly article
title: Defect basis property of the eigenvectors of a selfadjoint operator- valued function and formula for defect
zbMATH Open document ID: 0786.47016
DOI: 10.1007/BF01196605
author: Ilya Krupnik
published in: Integral Equations and Operator Theory
publication date: 1993-06-29T00:00:00Z
review text: The author studies the possible changes of dimension of the positive part of a continuous selfadjoint operator-valued function, when its variable transverses through some Fredholm eigenvalue. Some results about the defect basis property are also obtained and the formula for the defect is proved.
reviewed by: Mircea I. Cîrnu
Mathematics Subject Classification ID: 47A56
zbMATH DE Number: 222161
zbMATH Keywords: changes of dimension of the positive part of a continuous selfadjoint operator-valued function
zbMATH Keywords: defect basis property
MaRDI profile type: Publication
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full work available at URL: https://doi.org/10.1007/bf01196605
OpenAlex ID: W2079431018
description: scientific article; zbMATH DE number 222161