Naseer Ahmad AsifImran Talib2018-10-182018-10-182015Asif, N. A., Talib, I.,& Tunc, C. (2015). Existence of solution for first-order coupled system with nonlinear coupled boundary conditions. Boundary Value Problems, 2015(1), 1-9. (Naseer Ahmad Asif and Imran Talib) (IF 1.014 JCR Listed)https://escholar.umt.edu.pk/handle/123456789/3354In this article, the existence of solution for the first-order nonlinear coupled system of ordinary differential equations with nonlinear coupled boundary condition (CBC for short) is studied using a coupled lower and upper solution approach. Our method for a nonlinear coupled system with nonlinear CBC is new and it unifies the treatment of many different first-order problems. Examples are included to ensure the validity of the results.enMathematicslower and upper solutions; coupled nonlinear system; coupled nonlinear boundary condition; Arzela-Ascoli theorem; Schauder theoremArticle