Descent for regular epimorphisms in Barr exact Goursat categories

• Autor(es): Janelidze, George ; Sobral, Manuela
• Data: 2009
• Identificador Persistente: http://hdl.handle.net/10316/11194
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Regular category; Barr exact category; Goursat category; Equivalence relation; Eff ective descent morphism
• Tipo de Documento: Preprint
• Idioma: Inglês

Descrição

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