Extension of maps defined on many fibres

• Autores: Juan Carlos Naranjo del Val, Miguel A. Barja
• Localización: Collectanea mathematica, ISSN 0010-0757, Vol. 49, Fasc. 2-3, 1998, págs. 227-238
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • 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.