Hocine, Kouider Miloud; Messirdi, Bekkai; Benharrat, Mohammed Left and right generalized Drazin invertibility of an upper triangular operator matrices with application to boundary value problems. (English) Zbl 1412.47002 Int. J. Anal. Appl. 17, No. 1, 105-121 (2019). MSC: 47A05 PDFBibTeX XMLCite \textit{K. M. Hocine} et al., Int. J. Anal. Appl. 17, No. 1, 105--121 (2019; Zbl 1412.47002) Full Text: Link
Membarki, Leila; Benharrat, Mohammed; Messirdi, Bekkai Quasi-compact perturbations of the Weyl essential spectrum and application to singular transport operators. (English) Zbl 1463.47064 Int. J. Anal. Appl. 9, No. 2, 83-89 (2015). MSC: 47B07 47A10 82D75 PDFBibTeX XMLCite \textit{L. Membarki} et al., Int. J. Anal. Appl. 9, No. 2, 83--89 (2015; Zbl 1463.47064) Full Text: Link
Benharrat, Mohammed; Messirdi, Bekkai Strong metrizability for closed operators and the semi-Fredholm operators between two Hilbert spaces. (English) Zbl 1463.47017 Int. J. Anal. Appl. 8, No. 2, 110-122 (2015). MSC: 47A10 47A30 47A53 47B02 PDFBibTeX XMLCite \textit{M. Benharrat} and \textit{B. Messirdi}, Int. J. Anal. Appl. 8, No. 2, 110--122 (2015; Zbl 1463.47017) Full Text: Link