•   Département de Mathématiques
•   Faculté des Sciences d'Agadir
•   Hay Dakhla 8106, 80000-Agadir
•    s.hadd@uiz.ac.ma

• Propriétés qualitatives des équations d'évolution (positivité, L^p- régularité maximale,...)
• Équations d'évolution linéaire non autonomes : théorie asymptotique (en particulier dichotomie exponentielle), théorie de l'existence.
• Théorie du contrôle déterministe et stochastiques en dimension infinie (les systèmes réguliers de Salamon-Weiss)
• Analyse Stochastique en dimension infinie

• Equations différentielles non-linéaires (Licence de Math SMA6): 2014-2023
  polycopié cours, polycopié TD
• Analyse 1 (Filières SMA 1 et SMI1) 2018-2023
  polycopié cours, polycopié TD, Examens corrigés
• Équations de Plusieurs variables SMA3 2018
  polycopié TD

• Contrôle et stabilité des systèmes linéaires en dimension-infinie
  polycopié de cours

1. Y. El Kaderi, S. Hadd and H. Bounit,Analysis and control of integro-differential Volterra equations with delays. (Accepted in Semigroup Forum), https://arxiv.org/pdf/2102.08805.pdf
2. M. Fkirine and S. Hadd, Solving stochastic equations with unbounded nonlinear perturbations, (Accepted in Stochastics) arXiv preprint arXiv:2102.06996
3. O. El-Mennaoui, S. Hadd, Y. Kharou , On the admissibility of observation operators in the context of maximal regularity Journal of Evolution Equations, (To appear)
4. S Hadd, F.-Z Lahbiri and A semigroup approach to stochastic systems with input delay at the boundary, Mathematical Control and Related Fields 13 (2), 454-469, 2023
5. M. Fkirine and S. Hadd, On nonlinear Miyadera-Voigt perturbations, Archiv der Mathematik 119, 179–188, 2022.
6. S. Hadd and F.Z. Lahbiri, A semigroup approach to stochastic systems with input delay at the boundary, Mathematical Control and Related Fields, doi/10.3934/mcrf.2022004
7. A. Amansag, H. Bounit, A. Driouich, and S. Hadd, Staffans-Weiss perturbations for Maximal -regularity in Banach spaces, Journal of Evolution Equations, 22 (2022), no. 1, 15.
8. A. Boulouz, H. Bounit, and S. Hadd, Feedback theory approach to positivity and stability of evolution equations, Systems & control Letters, 161 (2022), 105167
9. F.Z. Lahbiri and S. Hadd, A functional analytic approach to infinite dimensional stochastic linear systems, SIAM Journal on Control and Optimization, 59 (5) (2021), 3762–3786
10. M. Lasri, H. Bounit, and S. Hadd, Dichotomy of linear partial differential equations of neutral type in Banach spaces, Journal of Dynamics and Differential Equations, 33 (4) (2021), 1663–1678.
11. Y. El Gantouh and Said Hadd, Well-posedness and approximate controllability of neutral network systems, Networks & Heterogeneous Media (NHM), 16 (4) (2021), 569-589
12. Y. El Gantouh, S. Hadd, and A. Rhandi, Approximate controllability of network systems, Evolution Equations & Control Theory, 10 (4) (2021), 749-766.
13. A. Boulouz, H. Bounit, and S. Hadd, Well-posedness and exponential stability of boundary control systems with dynamic boundary conditions, Systems & Control Letters, 147 (2021), 104825.
14. S. Boulite, S. Hadd, and L. Maniar, Feedback theory to the well-posedness of evolution equations, Philosophical Transactions of the Royal Society A, 378, Issue 2185, (2020), 616--634. doi.org/10.1098/rsta.2019.0616
15. A. Boulouz, H. Bounit, A. Driouich, S. Hadd, On norm continuity, differentiability and compactness of perturbed semigroups, Semigroup Forum, 101 (3), (2020) 547-570.
16. M. Lasri, H. Bounit, and S. Hadd, On exact controllability of linear perturbed boundary systems: a semigroup approach, IMA Journal of Mathematical Control and Information, 37 (4), (2020) 1548--1573.
17. A. Amansag, H. Bounit, A. Driouich, S. Hadd, On the maximal regularity for perturbed autonomous and nonautonomous evolution equations,} Journal of Evolution Equations, 20 (1), (2020) 165-190.
18. S. Boulite, S. Hadd and R. Saij, Error feedback regulation problem for regular linear systems, IMA Journal of Mathematical Control and Information, 35 (1) (2018), 315--339.
19. S. Hadd, R. Manzo and A. Rhandi, Unbounded perturbation of the generator domain, Discrete and Continuous Dynamical Systems A, 35 (2) (2015), 703--723.
20. S. Hadd, H. Nounou and M. Nounou, Eventual norm continuity of neutral semigroup on Banach spaces, Journal of Mathematical Analysis and Applications, 375 (2011), 543-552.
21. S. Hadd and Q-C. Zhong, On feedback stabilizability of linear systems with state and input delays in Banach spaces, IEEE Transaction Automatic Control, 54 (3) (2009), 438--451.
22. S. Hadd, A. Rhandi and R. Schnaubelt, Feedbacks for non-autonomous delay control linear systems, IMA Journal of Mathematical Control and Information, 25 (2008), 85-110.
23. S. Hadd, Singular functional differential equations of neutral type in Banach spaces, Journal of Functional Analysis, 254 (2008), 2069-2091.
24. S. Hadd and A. Rhandi, Feedbacks for linear neutral equations in infinite dimensional spaces, Note di Mathematica, 28 (2008), 43-68.
25. A. El-Harfi, H. Bounit and S. Hadd, Representation of infinite-dimensional neutral non-autonomous control systems, Journal of Mathematical Analysis and Applications, 323 (2006), 497--512.
26. S. Hadd, An evolution equation approach to nonautonomous linear systems with state, input and output delays, SIAM Journal on Control and Optimization, 45 (2006), 246--272.
27. H. Bounit and S. Hadd, Regular linear systems governed by neutral FDEs, Journal of Mathematical Analysis and Applications, 320 (2006), 836--858.
28. S. Hadd, A. Idrissi and A. Rhandi, The regular linear systems associated to the shift semigroups and application to control delay systems, Mathematics of Control Signals and Systems, 18 (2006), 272--291.
29. S. Hadd and A. Idrissi, On the admissibility of observation for perturbed semigroups on Banach spaces, Systems & Control Letters, 55 (2006), 1--7.
30. S. Hadd, Exact controllability of infinite dimensional systems persists under small perturbations, Journal of Evolution Equations, 5 (2005), 545--555.
31. S. Hadd and A. Idrissi, Regular linear systems governed by systems with state, input and output delays, IMA Journal of Mathematical Control and Information, 22 (2005), 423--439.
32. S. Boulite, S. Hadd and L. Maniar, Critical spectrum and stability for population equation with diffusion in unbounded domains, Discrete and Continuous Dynamical Systems B, 5 (2005), 265--276.
33. S. Hadd, Unbounded perturbations of C_0-semigroups on Banach spaces and applications, Semigroup Forum, 70 (2005), 451-465.

1. S. Hadd and F.Z. Lahbiri, Stochastic delay-differential equations as bacterial population model with boundary feedback, IFAC PapersOnLine 55-12 (2022) 202–207.
2. M. Fkirine and S. Hadd, The well-posedness of a parabolic non-autonomous semilinear equation, IFAC PapersOnLine 55-12 (2022) 198–201.
3. Y. Kharou, O. El Mennaoui and S. Hadd, On the admissibility of observation for perturbed non-autonomous linear systems, IFAC PapersOnLine 55-12 (2022) 188–192.
4. S. Hadd and Q-C. Zhong, Conditions on feedback stabilization of systems with state and input delays in Banach spaces, Proc. 46th IEEE Conference on Decision and Control. New Orleans, LA, USA, (2007), pp. 2094--2099.
5. S. Hadd and Q.-C. Zhong, Passivity of infinite dimensional linear systems with state, input and output delays. In: eds. Proc. 17th IFAC World Congress. Seoul, Korea, (2008), pp. 4198-4203.
6. S. Hadd and Q.-C. Zhong, Perturbation theory of boundary value problems and approximate controllability of perturbed boundary control problems.In: eds. Proc. 47th IEEE Conference on Decision and Control, Cancun, Mexico, (2008), pp.1465--1470.
7. S. Boulite, S. Hadd, H. Nounou and M. Nounou, The PI-Controller for infinite dimension linear systems in Banach state spaces. American Control Conference, ACC-2009, St. Louis, Missouri, USA, (2009), pp. 3095--3100.
8. S. Hadd and Q.-C. Zhong, On Approximate controllability of infinite dimensional neutral systems. Proc. 7th Asian Control Conference. Hong Kong, China, (2009), pp. 45--50.
9. S. Boulite, S. Hadd, H. Nounou and M. Nounou, On the admissibility of control operators for perturbed semigroups and application to time-delay systems, Proc. 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference, Shanghai, P.R. China, (2009), pp. 3400--3405.
10. S. Hadd, H. Nounou and M. Nounou, On feedback stabilizability of neutral systems, Proc. 49th IEEE Conference on Decision and Control, Atlanta, (2010), pp. 702--707.

1. S. Hadd, A new approach to quadratic problem for stochastic systems with unbounded control and observation operators, Preprint
2. S. Hadd, Sum method to parabolic Volterra integrodifferential equations, Preprint
3. S. Hadd, On stabilization of delay stochastic systems, Preprint
4. S. Hadd, Maximal regularity for perturbed stochastic evolution equations, Preprint

Thèses soutenues:

• Youness El Kaderi, Analyse and control of delay integro-differential equations, (defended January 19, 2024)
• Mohamed Fkerine: Contribution to the admissibility of a class of semilinear stochastic evolution equations and applications (defended January 20, 2023)
• Fatima Zahra Lahbiri, Well-posedness of Stochastic control systems (defended Mars 5, 2022)
• Abed Boulouz, regularity of perturbed semigroups on Banach spaces (defended December 12, 2020)
• Merieme Lasri, Controllability, stability and stabilization of neutral equations (defended December 11, 2020)
• Yassine El Gantouh, Approximate controllability of transport networks systems (defended December 31, 2020)
• Ahmed Amensag, On the maximal regularity of evolution equations (defended October, 2020)