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Electronic Journal of Linear Algebra
Volume 27 Article 17
2014
Image-kernel (P,Q)-inverses in rings
Dijana Mosic
Dragan S. Djordjev ic
dragan@pmf.ni.ac.rs
Gabriel Kantun-Montiel
Follow this and additional works at : /ela
Recommended Citation
Mosic, Dijana; Djordjevic, Dragan S.; and Kantun-Montiel, Gabriel. (2014), Image-kernel ( ,Q)-inverses in rings, Electronic Journal
of Linear Alge bra, Volume 27.
DOI: http://dx ./10.13001/1081-3810.1618
This Article is brought to you for free and open access by Wyoming Scholars Repository. It has been accepted for inclusion in Electronic Journal of
Linear Algebra by an authorized administrator of Wyoming Scholars Repository. For more information, please contact scholcom@.
Electronic Journal of Linear Algebra ISSN 1081-3810
A publication of the International Linear Algebra Society
Volume 27, pp. 272-283, March 2014 ELA
http://math.technion.ac.il/iic/ela
IMAGE-KERNEL (P, Q)-INVERSES IN RINGS∗
´† ´† ´ ‡
DIJANA MOSIC , DRAGAN S. DJORDJEVIC , AND GABRIEL KANTUN-MONTIEL
Abstract. Elements with equal idempotents related to their image-kernel (p,q)-inverses are
characterized, and applications to perturbations, reverse order law and commutativity are given.
Key words. Outer inverse, Idempotents, Ring.
AMS subject classifications. 16B99, 15A09, 46L05.
1. Introduction. Let R be an associative ring with unit 1. We use R• to denote
the set of all idempotents of R. For a ∈ R, we define the following kernel ideals
a◦ = {x ∈ R : ax
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