Essential spectra and Drazin invertibility of quasisimilar closed operators

Messirdi, Bekkai; Djellouli, Ghouti; Azzouz, Abdelhalim

dc.contributor.author	Messirdi, Bekkai
dc.contributor.author	Djellouli, Ghouti
dc.contributor.author	Azzouz, Abdelhalim
dc.date.accessioned	2019-06-25T10:11:20Z
dc.date.available	2019-06-25T10:11:20Z
dc.date.issued	2018
dc.identifier.uri	http://e-biblio.univ-mosta.dz/handle/123456789/11169
dc.description.abstract	The purpose of this paper is to introduce several generalizations of the notion of similarity between closed operators on a Hilbert space, in particular, the notion of quasi-similarity and mutually quasi-similarity. Furthermore, we explore to what extend they preserve spectral properties, Drazin invertibility and hyperinvariant subspaces.	en_US
dc.subject	Similarity	en_US
dc.subject	quasi-similarity	en_US
dc.subject	mutually quasi-similarity	en_US
dc.subject	Fredholm spectrums	en_US
dc.subject	Drazin invertibility	en_US
dc.subject	hyperinvariant subspaces	en_US
dc.title	Essential spectra and Drazin invertibility of quasisimilar closed operators	en_US
dc.type	Article	en_US