Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/43878
Title: | Some Remarks on Pullbacks in Gumm Categories | Authors: | Gran, Marino Rodelo, Diana |
Issue Date: | 2014 | Publisher: | DMUC - Textos de Matemática | Project: | info:eu-repo/grantAgreement/FCT/COMPETE/132981/PT | Serial title, monograph or event: | Categorical Methods in Algebra and Topology: Special Volume in Honour of Manuela Sobral | Volume: | 46 | 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. | URI: | https://hdl.handle.net/10316/43878 | Rights: | openAccess |
Appears in Collections: | I&D CMUC - Livros e Capítulos de Livros |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Pullbacks_Gumm_Cats_Revised.pdf | 252.91 kB | Adobe PDF | View/Open |
Google ScholarTM
Check
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.