Spectral enclosures for a class of block operator matrices

dc.creatorGiribet, Juan I.
dc.creatorLanger, Matthias
dc.creatorMartínez Pería, Francisco Dardo
dc.creatorPhilipp, Friedrich
dc.creatorTrunk, Carsten
dc.date2020
dc.date2021-09-15T21:21:47Z
dc.date.accessioned2023-07-15T03:15:42Z
dc.date.available2023-07-15T03:15:42Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/124909
dc.identifierissn:0022-1236
dc.identifierissn:1096-0783
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7465039
dc.descriptionWe prove new spectral enclosures for the non-real spectrum of a class of 2 × 2 block operator matrices with self-adjoint operators A and D on the diagonal and operators B and − B* as off-diagonal entries. One of our main results resembles Gershgorin's circle theorem. The enclosures are applied to J-frame operators.
dc.descriptionFacultad de Ciencias Exactas
dc.formatapplication/pdf
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectMatemática
dc.subjectCiencias Exactas
dc.subjectBlock operator matrices
dc.subjectQuadratic numerical range
dc.subjectSpectral enclosure
dc.subjectGershgorin’s circle
dc.titleSpectral enclosures for a class of block operator matrices
dc.typeArticulo
dc.typePreprint


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