Local homeomorphisms via ultrafilter convergence

• Autor(es): Clementino, Maria Manuel ; Hofmann, Dirk ; Janelidze, George
• Data: 2003
• Identificador Persistente: http://hdl.handle.net/10316/11436
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Local homeomorphism; Discrete fibration; Ultrafilter
• Tipo de Documento: Preprint
• Idioma: Inglês

Descrição

Using the ultrafilter-convergence description of topological spaces, we generalize Janelidze-Sobral characterization of local homeomorphisms between finite topological spaces, showing that local homeomorphisms are the pullback-stable discrete fibrations.