| Inner derivations and norm equality M Barraa, M Boumazgour Proceedings of the American Mathematical Society 130 (2), 471-476, 2002 | 70 | 2002 |
| A note on the spectrum of an upper triangular operator matrix M Barraa, M Boumazgour Proceedings of the American Mathematical Society 131 (10), 3083-3088, 2003 | 47 | 2003 |
| On the perturbations of spectra of upper triangular operator matrices M Barraa, M Boumazgour Journal of mathematical analysis and applications 347 (1), 315-322, 2008 | 27 | 2008 |
| A lower bound of the norm of the operator X→ AXB+ BXA. M Barraa, M Boumazgour Extracta Mathematicae 16 (2), 223-227, 2001 | 22 | 2001 |
| On the essential numerical range M Barraa, V Müller Acta Sci. Math.(Szeged) 71, 1-2, 2005 | 15 | 2005 |
| Norm equality for a basic elementary operator M Barraa, M Boumazgour Journal of mathematical analysis and applications 286 (1), 359-362, 2003 | 11 | 2003 |
| Spectra of the difference, sum and product of idempotents M Barraa, M Boumazgour Studia Mathematica 1 (148), 1-3, 2001 | 10 | 2001 |
| On the product of two generalized derivations M Barraa, S Pedersen Proceedings of the American Mathematical Society 127 (9), 2679-2683, 1999 | 10 | 1999 |
| Essential numerical range of elementary operators M Barraa Proceedings of the American Mathematical Society 133 (6), 1723-1726, 2005 | 9 | 2005 |
| The Drazin and generalized Drazin invertibility of linear combinations of idempotents M Barraa Journal of Mathematical Analysis and Applications 478 (2), 1163-1171, 2019 | 8 | 2019 |
| Numerical range submultiplicity M Barraa, M Boumazgour Linear and Multilinear Algebra 63 (11), 2311-2317, 2015 | 8 | 2015 |
| Sous-espaces hyperinvariants d'un operateur nilpotent sur un espace de Banach M Barraa Journal of Operator Theory, 315-321, 1989 | 8 | 1989 |
| A note on the orthogonality of bounded linear operators M Barraa, M Boumazgour Functional Analysis, Approximation and Computation 4 (1), 65-70, 2012 | 6 | 2012 |
| Norm of a derivation and hyponormal operators. M Barraa, M Boumazgour Extracta Mathematicae 16 (2), 229-233, 2001 | 6 | 2001 |
| Sous-espaces invariants d'un opérateur nilpotent sur un espace de Banach M Barraa, B Charles Linear Algebra and its Applications 153, 177-182, 1991 | 6 | 1991 |
| Le treillis des sous-espaces hyperinvariants d'un opérateur nilpotent sur un espace de Banach M Barraa Académie de Montpellier, Université Montpellier II des Sciences et …, 1987 | 6 | 1987 |
| On equivalence of linear combinations of idempotents M Barraa, EH Benabdi Linear and Multilinear Algebra 68 (5), 983-990, 2020 | 5 | 2020 |
| A formula for the numerical range of elementary operators M Barraa International Scholarly Research Notices 2014, 2014 | 5 | 2014 |
| Sur l'orbite d'un espace de Banach sous l'action du commutant d'un opérateur nilpotent M Barraa, B Charles Linear Algebra and its Applications 135, 167-170, 1990 | 5 | 1990 |
| Numerical range of quaternionic right linear bounded operators S Moulaharabbi, M Barraa, EH Benabdi Linear and Multilinear Algebra 70 (22), 7599-7610, 2022 | 4 | 2022 |
