Comparison of solutions of systems of delay di erential equations using Taylor collocation method, Lambert W function and variational iteration method

In this paper, solution of systems of delay di erential equations, with initial conditions, using numerical methods, including the Taylor collocation method, the Lambert W function and the variational iteration method, is considered. We have endeavored to show the most appropriate method by comparing the solutions of this system of equations with di erent types of methods. All numerical computations have been performed on the computer algebraic system, Matlab.