Finite preorders and topological descent

• Author(s): Janelidze, George ; Sobral, Manuela
• Date: 1999
• Persistent ID: http://hdl.handle.net/10316/11557
• Origin: Estudo Geral - Universidade de Coimbra
• Subject(s): Descent data; (effective) descent map; Indexed categories; Discrete fibrations; Étale-descent
• Document Type: Preprint
• Language: English

Description

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