1 citations · 2 across the 5 of their papers we have counts for
7 papers
Spectral properties of (m;n)-isosymmetric multivariable operators
Sid Ahmed Ould Ahmed Mahmoud, Ahmed Bachir, Salah Mecheri +1
Inspired by recent works on -isometric and -symmetric multivariables operators on Hilbert spaces, in this paper we introduce the class of -isosymmetric multivariables…
On the commutativity of closed symmetric operators
Souheyb Dehimi, Mohammed Hichem Mortad, Ahmed Bachir
In this article, we give conditions guaranteeing the commutativity of a bounded self-adjoint operator with an unbounded closed symmetric operator.
Unbounded generalizations of the Fuglede-Putnam theorem
Souheyb Dehimi, Mohammed Hichem Mortad, Ahmed Bachir
In this paper, we prove and disprove several generalizations of unbounded versions of the Fuglede-Putnam theorem.
On Generalized Powers of Operators
Ahmed Bachir, Mohammed Hichem Mortad, Nawal Ali Sayyaf
In this note, we introduce generalized powers of linear operators. More precisely, operators are not raised to numbers but to other operators. We discuss several properties as rega…
Unbounded generalizations of the Fuglede-Putnam theorem and applications to the commutativity of self-adjoint operators
Souheyb Dehimi, Mohammed Hichem Mortad, Ahmed Bachir
In this article, we prove and disprove several generalizations of unbounded versions of the Fuglede-Putnam theorem. As applications, we give conditions guaranteeing the commutativi…
Asymptotic behavior of blowing-up radial solutions for quasilinear elliptic systems arising in the study of viscous, heat conducting fluids
Ahmed Bachir, Jacques Giacomoni, Guillaume Warnault
In this paper, we deal with the following quasilinear elliptic system involving gradient terms in the form: \begin{center} $\begin{cases} Δ_p u= v^m| \nabla u |^α& \text{in}\quad Ω…
The Berberian's transform and an asymmetric Putnam-Fuglede theorem
Ahmed Bachir, Patryk Pagacz
We present how to apply a Berberian's technique to asymmetric Putnam-Fuglede theorems. In particular, we proved that if belong to the union of classes of -parano…