On relative essential spectra of block operator matrices and application
Bull. Korean Math. Soc. 2016 Vol. 53, No. 3, 681-698
https://doi.org/10.4134/BKMS.b150233
Published online May 31, 2016
Salma Charfi and Ines Walha
Department of Mathematics, Department of Mathematics
Abstract : In this paper, we investigaterelative essential spectra of $2\times2$ block operator matrix using the Fredholm perturbation theory. Furthermore, an example for two-group transport equations is presented to illustrate the validity of the main results.
Keywords : matrix operator, Fredholm perturbations, $M$-essential spectra, transport operator
MSC numbers : 47A10, 47A53, 34K08
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