Department of Exact and Applied Sciences Dosso Unversity Dosso Niger;
Department of Exact and Applied Sciences Dosso Unversity Dosso Niger;
Department of Exact and Applied Sciences Dosso Unversity Dosso Niger;
Department of Mathematics and Computer Sciences Abdou Moumouni Unversity Niamey Niger;
Covid-19; Epidemiology; Differential Equations; Operators; Numerical Analysis; Matlab;