Descent for regular epimorphisms in Barr exact Goursat categories

• Author(s): Janelidze, George ; Sobral, Manuela
• Date: 2009
• Persistent ID: http://hdl.handle.net/10316/11194
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Regular category; Barr exact category; Goursat category; Equivalence relation; Eff ective descent morphism
• Document Type: Preprint
• Language: English

Description

We show that the category of regular epimorphisms in a Barr exact Goursat category is almost Barr exact in the sense that (it is a regular category and) every regular epimorphism in it is an e ective descent morphism. FCT/Centro de Matemática da Universidade de Coimbra; South African NRF