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Upper triangular operator matrices and limit points of the essential spectrum

dc.creatorKarmouni, Mohammed
dc.creatorTajmouati, A.
dc.creatorA. El Bakkali, A.
dc.date2019-08-06
dc.date.accessioned2019-11-14T12:01:19Z
dc.date.available2019-11-14T12:01:19Z
dc.identifierhttps://www.revistaproyecciones.cl/article/view/3691
dc.identifier10.22199/issn.0717-6279-2019-03-0026
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/113697
dc.descriptionIn this paper, we investigate the limit points set of essential spectrum of upper triangular operator matrices We prove that accσe(MC) ∪ W = accσe(A) ∪ accσe(B) where W is the union of certain holes in accσe(MC), which happen to be subsets of accσe(B) ∩ accσe(A). Also, several sufficient conditions for accσe(MC) = accσe(A) ∪ accσe(B) holds are given.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherUniversidad Católica del Norte.es-ES
dc.relationhttps://www.revistaproyecciones.cl/article/view/3691/3212
dc.rightsDerechos de autor 2019 M. Karmouni, A. Tajmouati, A. A. El Bakkalies-ES
dc.rightshttps://creativecommons.org/licenses/by/4.0es-ES
dc.sourceProyecciones. Journal of Mathematics; Vol 38 No 3 (2019); 401-409en-US
dc.sourceProyecciones. Revista de Matemática; Vol. 38 Núm. 3 (2019); 401-409es-ES
dc.source0717-6279
dc.source0716-0917
dc.subjectFredholm operatoren-US
dc.subjectEssential spectraen-US
dc.subjectLimit pointen-US
dc.subjectOperator matricesen-US
dc.subjectSpectrum, resolventen-US
dc.subject47A10en-US
dc.subjectLocal spectral propertiesen-US
dc.subject47A11en-US
dc.titleUpper triangular operator matrices and limit points of the essential spectrumen-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeArtículo revisado por pareses-ES
dc.typetexten-US


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