Abstract
In this paper, Haar wavelet collocation method (HWCM) for nonlinear delay Volterra, delay Fredholm and delay Volterra-Fredholm Integro-Differential Equations (IDEs) are studied numerically using HWCM. This method is very useful for solving nonlinear IDEs. The technique (HWCM) reduced the given equations into a system of nonlinear algebraic equations. The nonlinear system is then solved by Broydens technique. Some numerical examples are taken from literature for the validation purpose, computational efficiency and convergence of the proposed method. The approximate solution is compared with the exact solution and the maximum absolute and mean square root errors are presented for each example in tables. The comparison between exact and approximate solution is shown in figures for each example. The results are compared with existing methods from the literature. The results exhibit that the HWCM is simple, precise and efficient.