IMA Journal of Mathematical Control and Information Advance Access originally published online on March 14, 2007
IMA Journal of Mathematical Control and Information 2008 25(1):75-84; doi:10.1093/imamci/dnm006
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Properties of the weighted logarithmic matrix norms

Information Engineering School, University of Science and Technology, Beijing 100083, China

Department of Mathematics, Harbin Institute of Technology, Harbin 150001, China
Email: ghu{at}hit.edu.cn, ghuca{at}yahoo.ca
Email: mzliu{at}hit.edu.cn
Received on January 31, 2006; Accepted on December 9, 2006
In this paper, we are concerned with the properties of the weighted logarithmic matrix norms. A relation between the elliptic logarithmic matrix norm and the weighted logarithmic matrix norm is given. Based on Lyapunov equations, two weighted logarithmic matrix norms are constructed which are less than 1-logarithmic matrix norm and
-logarithmic matrix norm, respectively. Then, an iterative scheme is presented to obtain the logarithmically
-efficient matrix norm. Numerical examples are given to illustrate the results.
Keywords: the logarithmic matrix norm; the logarithmically
-efficient norm; Lyapunov equation.