The extremal iteration solution to a coupled system of nonlinear conformable fractional differential equations

In this paper, we consider a coupled system of nonlinear conformable fractional differential equations by using the comparison principle and the monotone iterative technique combined with the method of upper and lower solutions: { Mathematical Formulas } where { Mathematical Formulas } are the conformable fractional derivatives with 0 α ≤ 1. We obtain the existence of extremal iteration solution to the system, and the main results are examined by the help of an example.