Joint numerical ranges of operators in semi-Hilbertian spaces HBKFOAMS Ahmed Linear Algebra and its Applications 555 (555), 266-2684, 2018 | 107* | 2018 |

Am-Isometric operators in semi-Hilbertian spaces OAMS Ahmed, A Saddi Linear Algebra and its applications 436 (10), 3930-3942, 2012 | 63 | 2012 |

Joint normality of operators in semi-Hilbertian spaces H Baklouti, K Feki, SA Ould Ahmed Mahmoud Linear and Multilinear Algebra 68 (4), 845-866, 2020 | 55 | 2020 |

On the class of n-power Dm-quasi-normal operatos on Hilbert spaces OBS Ahmed, OAMS Ahmed Oper. Matrices 14, 159-174, 2020 | 46 | 2020 |

m-isometric operators on Banach spaces, Asian-European J OAMS Ahmed Math 3 (1), 1-19, 2010 | 38 | 2010 |

On (m, C)-Isometric Commuting Tuples of Operators on a Hilbert Space MCJELEE Sid Ahmed Ould Ahmed Mahmoud Results in Mathematics 73 (51), 2018 | 28* | 2018 |

Some properties of m-isometries and m-invertible operators on Banach spaces OAMS Ahmed Acta Mathematica Scientia 32 (2), 520-530, 2012 | 27 | 2012 |

(A, m)–symmetric commuting tuples of operators on a Hilbert space M Chō, SA Mahmoud Mathematical Inequalities and Applications 22 (3), 931-947, 2019 | 26 | 2019 |

Aliphatic and poly-aromatic hydrocarbons pollution at the drainage basin of Suez Oil Refinery Company OE Ahmed, SA Mahmoud, AEM Mousa Current Science International 4 (1), 27-44, 2015 | 25 | 2015 |

Some results on higher orders quasi-isometries SAOA Mahmoud, A Saddi, K Gherairi Hacettepe Journal of Mathematics and Statistics 49 (4), 1315-1333, 2020 | 24 | 2020 |

Davis–Wielandt shells of semi-Hilbertian space operators and its applications K Feki, SAO Ahmed Mahmoud Banach Journal of Mathematical Analysis 14, 1281-1304, 2020 | 21 | 2020 |

m-partial isometries on Hilbert spaces A Saddi, OAMS Ahmed International Journal of Functional Analysis 2 (1), 67-83, 2010 | 20 | 2010 |

On n-quasi-(m, C)-isometric operators SAOA Mahmoud, M Chō, JE Lee Linear and Multilinear Algebra 68 (5), 1001-1020, 2020 | 18 | 2020 |

Time Asymptotic Behaviour for a One-Velocity Transport Operator with Maxwell Boundary Condition RS Aref Jeribi , Sid Ahmed Ould Ahmed Mahmoud Acta Appl Math 98, 163-179, 2007 | 18 | 2007 |

Hyponormal and k-quasi-hyponormal operators on semi-Hilbertian spaces SA Mahmoud, A Benali Australian Journal of Mathematical Analysis and Applications 13 (1), 1-22, 2016 | 17 | 2016 |

On the classes of (n, m)-power D-normal and (n, m)-power D-quasi-normal operators S Mahmoud, OBS Ahmed Oper. Matrices, 705-732, 2019 | 14 | 2019 |

ON A(m; p)- EXPANSIVE AND A(m; p)-HYPEREXPANSIVE OPERATORS ON BANACH SPACES -II OAMS ahmed J. Math. Comput. Sci. 5 (2), 123-148, 2015 | 14* | 2015 |

-*A*-Normal operators in semi-Hilbertian spacesA Benali, SA Ould Ahmed Mahmoud Afrika Matematika 30, 903-920, 2019 | 13 | 2019 |

GENERALIZATION OF m-PARTIAL ISOMETRIES ON A HILBERT SPACE OAMS Ahmed International Journal of Pure and Applied Mathematics 104 (No4), 599-619, 2015 | 12 | 2015 |

-quasi-*m*-isometric commuting tuple of operators on a Hilbert spaceM Chō, EMO Beiba, SAOA Mahmoud Annals of Functional Analysis 12, 1-18, 2021 | 11 | 2021 |