Faculty of Exact Sciences and Natural and Life Sciences

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    Stability conditions for fractional reaction-diffusion systems
    (Echahid Cheikh Larbi Tebessi University -Tebessa-, 2026-07-06) Salim Zidi
    This thesis aims to investigate a space-fractional variant of the conven- tional Lengyel–Epstein CIMA reaction model. Initially, we establish the global existence, uniqueness, and boundedness of solutions. We then ex- amine the system’s main analytical properties. Subsequently, we derive the conditions on the reactor size and diffusion coefficient that preclude the exis- tence of non-constant positive steady-state solutions. We further analyze the stability of the constant steady-state solution for both the ODE and PDE models. Finally, we establish sufficient conditions for the global asymp- totic stability of the positive steady-state solution using the direct Lyapunov method.