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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Applied Mathematics ...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Applied Mathematics and Computation
Article . 2004 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 2004
Data sources: zbMATH Open
DBLP
Article . 2004
Data sources: DBLP
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The reverse order law for the generalized inverse A(2)T,S

The reverse order law for the generalized inverse \(A^{(2)}_{T,S}\)
Authors: Guorong Wang; Bing Zheng;

The reverse order law for the generalized inverse A(2)T,S

Abstract

Let \(A\) be a matrix \(m \times n\) over the complex number field \(\mathbb{C}\), with \(rank\) \(A=n\), and let \(T\) and \(S\) be subspaces of \(\mathbb{C}^{n}\) and \(\mathbb{C}^{m}\) respectively, with dim \(T=\) dim \(S^{\perp }=t\leq r\). Then \(A\) has a \(\{2\}\)-inverse \(A_{T,S}^{(2)}\) such that \(range\) \(A_{T,S}^{(2)}=T\) and \(null space\) \(A_{T,S}^{(2)}=S\) if and only if \(AT \oplus S= \mathbb{C} ^{m}\) [cf. \textit{A. Ben-Israel} and \textit{T. N. E. Greville}, Generalized inverses: Theory and applications (Wiley, New York) (1974; Zbl 0305.15001)]. The reverse order law for the generalized inverse of the multiple matrix products yields a class of interesting problems that have attracted attention since 1966, when \textit{T. N. E. Greville} [SIAM Rev. 8, 518--521 (1966; Zbl 0143.26303)] gave a necessary and sufficient condition for reverse order law for the Moore-Penrose inverse, \((AB)^{\dagger }=B^{\dagger }A^{\dagger }\). In this paper the authors present a necessary and sufficient condition by a rank identity for the reverse order law \( (A_{1}A_{2} \cdots A_{n})_{T,S}^{(2)}=(A_{n})_{T_{n},S_{n}}^{(2)} \cdots (A_{2})_{T_{2},S_{2}}^{(2)}(A_{1})_{T_{1},S_{1}}^{(2)} \). As special cases, similar results are also derived for the Moore-Penrose inverse \(A^{\dagger }\), the weighted Moore-Penrose inverse \(A_{M,N}^{\dagger }\), the Drazin inverse \(A_{d}\) and the group inverse \(A_{g}\), respectively, of \(A\).

Related Organizations
Keywords

Reverse order law, Vector spaces, linear dependence, rank, lineability, group inverse, Matrix product, Theory of matrix inversion and generalized inverses, Drazin inverse, Generalized inverse \(A_{T,S}^{(2)}\), rank identity, Moore-Penrose inverse

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
11
Average
Top 10%
Average
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