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  • Research Article
  • Open Access

Further Results on the Reverse Order Law for -Inverse and -Inverse of a Matrix Product

Journal of Inequalities and Applications20102010:312767

  • Received: 28 October 2009
  • Accepted: 16 April 2010
  • Published:


Both Djordjević (2007) and Takane et al. (2007) have studied the equivalent conditions for and . In this note, we derive the necessary and sufficient conditions for , , and .


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Authors’ Affiliations

College of Mathematics and Statistics, Chongqing University, Chongqing, 400030, China


© D. Liu and H. Yang. 2010

This article is published under license to BioMed Central Ltd. 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.