Journal of Applied Mathematics
Volume 2012 (2012), Article ID 584704, 17 pages
Research Article

Method of Infinite System of Equations for Problems in Unbounded Domains

1Institute of Information Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
2College of Education, Thai Nguyen University, Thai Nguyen City 23000, Vietnam

Received 17 June 2012; Revised 11 August 2012; Accepted 25 August 2012

Academic Editor: Chein-Shan Liu

Copyright © 2012 Dang Quang A and Tran Dinh Hung. 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.


Many problems of mechanics and physics are posed in unbounded (or infinite) domains. For solving these problems one typically limits them to bounded domains and find ways to set appropriate conditions on artificial boundaries or use quasi-uniform grid that maps unbounded domains to bounded ones. Differently from the above methods we approach to problems in unbounded domains by infinite system of equations. In this paper we present starting results in this approach for some one-dimensional problems. The problems are reduced to infinite system of linear equations. A method for obtaining approximate solution with a given accuracy is proposed. Numerical experiments for several examples show the effectiveness of the offered method.