Extensions of maps defined on many fibres

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dc.contributor	Universitat de Barcelona
dc.contributor.author	Barja Yáñez, Miguel Ángel
dc.contributor.author	Naranjo del Val, Juan Carlos
dc.date	2011-03-08T09:48:58Z
dc.date	2011-03-08T09:48:58Z
dc.date	1998
dc.identifier.citation	0010-0757
dc.identifier.citation	169860
dc.identifier.uri	http://hdl.handle.net/2445/16908
dc.format	12 p.
dc.format	application/pdf
dc.language.iso	eng
dc.publisher	Universitat de Barcelona
dc.relation	Reproducció del document publicat a: http://www.collectanea.ub.edu/index.php/Collectanea/article/view/3937/4765
dc.relation	Collectanea Mathematica, 1998, vol. 49, num. 2-3, p. 227-238
dc.rights	(c) Universitat de Barcelona, 1998
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Geometria algebraica
dc.subject	Superfícies algebraiques
dc.subject	Algebraic geometry
dc.subject	Algebraic surfaces
dc.title	Extensions of maps defined on many fibres
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.description.abstract	Let S be a fibred surface. We prove that the existence of morphisms from non countably many fibres to curves implies, up to base change, the existence of a rational map from S to another surface fibred over the same base reflecting the properties of the original morphisms. Under some conditions of unicity base change is not needed and one recovers exactly the initial maps.