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Nedra Moalla and Wafa Selmi
On a characterization of Jeribi, Rakočević, Schechter, Schmoeger and Wolf essential spectra of a 3⨉3 block operator matrices with non diagonal domain and application
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Nedra Moalla
Wafa Selmi
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47A10
47A53
34K08
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3⨉3 block operator matrices
non diagonal domain
Fredholm perturbations
essential spectra
three-group transport theory
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