Open AccessPerturbation results in the Fredholm theory and m-essential spectra of some matrix operators
Author(s) -
Boulbeba Abdelmoumen,
Sadok Chakroun,
Maher Mnif
Publication year - 2021
Publication title -
filomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 34
eISSN - 2406-0933
pISSN - 0354-5180
DOI - 10.2298/fil2107141a
Subject(s) - mathematics , compact space , pure mathematics , essential spectrum , fredholm theory , compact operator , spectrum (functional analysis) , operator theory , measure (data warehouse) , matrix (chemical analysis) , perturbation (astronomy) , spectral line , banach space , fredholm integral equation , mathematical analysis , integral equation , quantum mechanics , physics , chemistry , chromatography , extension (predicate logic) , database , computer science , programming language
In this paper, we will use some new properties of non-compactness measure, in order to establish a description of the M-essential spectrum for some matrix operators on Banach spaces.