Please use this identifier to cite or link to this item:
Title: Some Remarks on Pullbacks in Gumm Categories
Authors: Gran, Marino 
Rodelo, Diana 
Issue Date: 2014
Publisher: DMUC - Textos de Matemática
Issue Date: 2014
Publisher: DMUC - Textos de Matemática
Project: info:eu-repo/grantAgreement/FCT/COMPETE/132981/PT 
Abstract: We extend some properties of pullbacks which are known to hold in a Mal'tsev context to the more general context of Gumm categories. The varieties of universal algebras which are Gumm categories are precisely the congruence modular ones. These properties lead to a simple alternative proof of the known property that central extensions and normal extensions coincide for any Galois structure associated with a Birkhoff subcategory of an exact Goursat category.
Rights: openAccess
Appears in Collections:I&D CMUC - Livros e Capítulos de Livros

Files in This Item:
File Description SizeFormat
Pullbacks_Gumm_Cats_Revised.pdf252.91 kBAdobe PDFView/Open
Show full item record

Page view(s) 50

checked on Aug 20, 2019


checked on Aug 20, 2019

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.