Abstract and Applied Analysis
Volume 2011 (2011), Article ID 658936, 37 pages
Research Article

Solutions of Smooth Nonlinear Partial Differential Equations

Department of Mathematics and Applied Mathematics, University of Pretoria, Pretoria 0002, South Africa

Received 1 February 2011; Accepted 15 April 2011

Academic Editor: Stephen Clark

Copyright © 2011 Jan Harm van der Walt. 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.


The method of order completion provides a general and type-independent theory for the existence and basic regularity of the solutions of large classes of systems of nonlinear partial differential equations (PDEs). Recently, the application of convergence spaces to this theory resulted in a significant improvement upon the regularity of the solutions and provided new insight into the structure of solutions. In this paper, we show how this method may be adapted so as to allow for the infinite differentiability of generalized functions. Moreover, it is shown that a large class of smooth nonlinear PDEs admit generalized solutions in the space constructed here. As an indication of how the general theory can be applied to particular nonlinear equations, we construct generalized solutions of the parametrically driven, damped nonlinear Schrödinger equation in one spatial dimension.