University of Tabriz Computational Methods for Differential Equations 2345-3982 10 4 2022 10 01 Combining the reproducing kernel method with a practical technique to solve the system of nonlinear singularly perturbed boundary value problems 942 953 12976 10.22034/cmde.2021.40288.1758 EN Saeid Abbasbandy Department of Applied Mathematics, Faculty of Science, Imam Khomeini International University, Qazvin 34149-16818, Iran. Hussein Sahihi Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran. Tofigh Allahviranloo Bahcesehir University, Faculty of Engineering and Natural Sciences, Istanbul, Turkey. Journal Article 2020 06 11 In this paper, a reliable new scheme is presented based on combining Reproducing Kernel Method (RKM) with a practical technique for the nonlinear problem to solve the System of Singularly Perturbed Boundary Value Problems (SSPBVP). The Gram-Schmidt orthogonalization process is removed in the present RKM. However, we provide error estimation for the approximate solution and its derivative. Based on the present algorithm in this paper, can also solve linear problem. Several numerical examples demonstrate that the present algorithm does have higher precision.  https://cmde.tabrizu.ac.ir/article_12976_2413349b474d733e951ce18a8f32e8e3.pdf