An operator theory problem book MH Mortad World Scientific, 2018 | 76 | 2018 |
An application of the Putnam-Fuglede theorem to normal products of self-adjoint operators MH Mortad Proceedings of the American Mathematical Society 131 (10), 3135-3141, 2003 | 73 | 2003 |
An all-unbounded-operator version of the Fuglede–Putnam theorem MH Mortad Complex Analysis and Operator Theory 6, 1269-1273, 2012 | 40 | 2012 |
Counterexamples in operator theory. MH Mortad https://link.springer.com/book/10.1007/978-3-030-97814-3 (Birkhäuser/Springer), 2022 | 38* | 2022 |
Yet more versions of the Fuglede–Putnam theorem MH Mortad Glasgow Mathematical Journal 51 (3), 473-480, 2009 | 34 | 2009 |
On some product of two unbounded self-adjoint operators MH Mortad Integral Equations and Operator Theory 64 (3), 399-408, 2009 | 34 | 2009 |
On the normality of the sum of two normal operators MH Mortad Complex Analysis and Operator Theory 6 (1), 105-112, 2012 | 32 | 2012 |
Right (or left) invertibility of bounded and unbounded operators and applications to the spectrum of products S Dehimi, MH Mortad Complex Analysis and Operator Theory 12, 589-597, 2018 | 29 | 2018 |
Chernoff-like counterexamples related to unbounded operators S Dehimi, MH Mortad Kyushu Journal of Mathematics 74 (1), 105-108, 2020 | 28 | 2020 |
On the absolute value of unbounded operators I Boucif, S Dehimi, MH Mortad J. Operator Theory 82 (2), 285-306, 2019 | 27 | 2019 |
On normal products of selfadjoint operators IB Jung, MH Mortad, J Stochel Kyungpook Mathematical Journal 57 (3), 457-471, 2017 | 27 | 2017 |
Conditions implying commutativity of unbounded self-adjoint operators and related topics K Gustafson, MH Mortad J. Operator Theory 76 (1), 159-169, 2016 | 27 | 2016 |
On the triviality of domains of powers and adjoints of closed operators MH Mortad Acta Sci. Math. (Szeged) 85 (3-4), 651-658, 2019 | 23 | 2019 |
Unbounded products of operators and connections to Dirac-type operators K Gustafson, MH Mortad Bulletin des Sciences Mathématiques 138 (5), 626-642, 2014 | 23 | 2014 |
Commutativity of unbounded normal and self-adjoint operators and applications MH Mortad Oper. Matrices 8 (2), 563-571, 2014 | 23 | 2014 |
Commutativity up to a factor for bounded and unbounded operators C Chellali, MH Mortad Journal of Mathematical Analysis and Applications 419 (1), 114-122, 2014 | 22 | 2014 |
Maximality of linear operators M Meziane, MH Mortad Rendiconti del Circolo Matematico di Palermo Series 2 68, 441-451, 2019 | 21 | 2019 |
Unbounded operators having self‐adjoint, subnormal, or hyponormal powers S Dehimi, MH Mortad Mathematische Nachrichten 296 (9), 3915-3928, 2023 | 19* | 2023 |
On the existence of normal square and nth roots of operators MH Mortad The Journal of Analysis 28 (3), 695-703, 2020 | 19 | 2020 |
Normal products of self-adjoint operators and self-adjointness of the perturbed wave operator on L2 (Rn) MH Mortad KB thesis scanning project 2015, 2003 | 19* | 2003 |