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Title: Comprehensive factorization and universal I-central extensions in the Mal'cev context
Authors: Bourn, Dominique 
Rodelo, Diana 
Keywords: Regular Mal'tsev category; Birkho subcategory; Comprehensive factorization; Central extension
Issue Date: 2010
Publisher: Centro de Matemática da Universidade de Coimbra
Citation: Pré-Publicações DMUC. 10-02 (2010)
Serial title, monograph or event: Pré-Publicações DMUC
Issue: 10-02
Place of publication or event: Coimbra
Abstract: We show that, under suitable left exact conditions on a re ection functor I, the construction of the associated universal I-central extension is reduced to the comprehensive factorization of a speci c internal functor. This observation produces some existence conditions which hold in particular for any re ection from a Mal'cev variety to any Birkho subvariety
Rights: openAccess
Appears in Collections:FCTUC Matemática - Vários

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