International Journal of Mathematics and Mathematical Sciences
Volume 21 (1998), Issue 3, Pages 499-505

Rapid convergence of approximate solutions for first order nonlinear boundary value problems

Alberto Cabada,1 Juan J. Nieto,1 and Seppo Heikkilä2

1Departamento de Anàlise Matemhtica, Facultade de Matemáticas, Universidade de Santiago de Compostela, Santiago de Compostela 15706, Spain
2Department of Mathematical Sciences, University of Oulu, Oulu 57 90570, Finland

Received 20 August 1996

Copyright © 1998 Alberto Cabada et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this paper we study the convergence of the approximate solutions for the following first order problem u(t)=f(t,u(t));t[0,T],au(0)bu(t0)=c,a,b0,t0(0,T]. Here f:I× is such that kfuk exists and is a continuous function for some k1. Under some additional conditions on fu, we prove that it is possible to construct two sequences of approximate solutions converging to a solution with rate of convergence of order k.