A Good Approximate Solution for Li´enard Equation in a Large Interval Using Block Pulse Functions

In this paper, the Block pulse functions (BPFs) and their operational matrices of integration and differentiation are used to solve Li´enard equation in a large interval. This method converts the equation to a system of nonlinear algebraic equations whose solution is the coefficients of Block pulse expansion of the solution of the Li´enard equation. Moreover, this method is examined by comparing the results with the results obtained by the Adomian decomposition method (ADM) and the Variational iteration method (VIM).