`Journal of Applied MathematicsVolume 2012, Article ID 320421, 13 pageshttp://dx.doi.org/10.1155/2012/320421`
Research Article

## An Iterative Algorithm for a Hierarchical Problem

1Department of Mathematics, Tianjin Polytechnic University, Tianjin 300387, China
2Department of Mathematics Education and the RINS, Gyeongsang National University, Chinju 660-701, Republic of Korea

Received 29 September 2011; Accepted 11 November 2011

Copyright © 2012 Yonghong Yao 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.

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