6 papers · 1 filter
A semigroup approach to stochastic systems with input delay at the boundary
Said Hadd, Fatima Zahra Lahbiri
This work focuses on the well-posedness of abstract stochastic linear systems with boundary input delay and unbounded observation operators. We use product spaces and a semigroup a…
Controllability of vertex delay type problems by the regular linear systems approach
Y. El Gantouh, S. Hadd, A. Rhandi
In this paper, we study the well-posedness and approximate controllability of a class of network systems having delays and controls at the boundary conditions. The particularity of…
Feedback theory approach to positivity and stability of evolution equations
Abed Boulouz, Hamid Bounit, Said Hadd
In this paper, we study the positivity and (uniform) exponential stability of a large class of perturbed semigroups. Our approach is essentially based on the feedback theory of inf…
Analysis and control of integro-differential Volterra equations with delays
Younes ElKadiri, Said Hadd, Hamid Bounit
The purpose of this paper is to introduce a semigroup approach to linear integro-differential systems with delays in state, control and observation parts. On the one hand, we use p…
Solving stochastic equations with unbounded nonlinear perturbations
Mohamed Fkirine, Said Hadd
This paper is interested in semilinear stochastic equations having unbounded nonlinear perturbations in the deterministic part and/or in the random part. Moreover, the linear part…
Well-posedness and approximate controllability of neutral network systems
Yassine El Gantouh, Said Hadd
In this paper, we study the concept of approximate controllability of retarded network systems of neutral type. On one hand, we reformulate such systems as free-delay boundary cont…