Finite preorders and topological descent

• Autor(es): Janelidze, George ; Sobral, Manuela
• Data: 1999
• Identificador Persistente: http://hdl.handle.net/10316/11557
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Descent data; (effective) descent map; Indexed categories; Discrete fibrations; Étale-descent
• Tipo de Documento: Preprint
• Idioma: Inglês

Descrição

It is shown that the descent constructions of finite preorders provide a simple motivation for those of topological spaces, and new counter-examples to open problems in Topological descent theory are constructed