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Search: MSC category 15A23 ( Factorization of matrices )

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1. CMB Online first

Chen, Jianlong; Patricio, Pedro; Zhang, Yulin; Zhu, Huihui
 Characterizations and representations of core and dual core inverses In this paper, double commutativity and the reverse order law for the core inverse are considered. Then, new characterizations of the Moore-Penrose inverse of a regular element are given by one-sided invertibilities in a ring. Furthermore, the characterizations and representations of the core and dual core inverses of a regular element are considered. Keywords:regularities, group inverses, Moore-Penrose inverses, core inverses, dual core inverses, Dedekind-finite ringsCategories:15A09, 15A23

2. CMB 1998 (vol 41 pp. 178)

Krupnik, Ilya; Lancaster, Peter
 Minimal pencil realizations of rational matrix functions with symmetries A theory of minimal realizations of rational matrix functions $W(\lambda)$ in the pencil'' form $W(\lambda)=C(\lambda A_1-A_2)^{-1}B$ is developed. In particular, properties of the pencil $\lambda A_1-A_2$ are discussed when $W(\lambda)$ is hermitian on the real line, and when $W(\lambda)$ is hermitian on the unit circle. Categories:93Bxx, 15A23
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