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hal-00334292, version 1

Quadratic functors on pointed categories

Manfred Hartl () 1, Christine Vespa () 2

Résumé : We study polynomial functors of degree 2, called quadratic, with values in the category of abelian groups Ab, and whose source category is an arbitrary category C with null object such that all objects are finite coproducts of a generating object E. A functorial equivalence is established between quadratic functors from C to Ab and certain minimal algebraic data. Applying this general result to the case where E is a cogroup these data take a particulary simple form. This application extends results of Baues and Pirashvili obtained for C being the category of free groups or modules of finite rank.

  • 1 :  Laboratoire de Mathématiques et leurs Applications de Valenciennes, EA 45 (LAMAV)
  • Université de Valenciennes et du Hainaut-Cambresis – CNRS : FRE2956
  • 2 :  Institut de Recherche Mathématique Avancée (IRMA)
  • CNRS : UMR7501 – Université Louis Pasteur - Strasbourg I
 
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  • Soumis le : Vendredi 24 Octobre 2008, 17:45:11
  • Dernière modification le : Vendredi 24 Octobre 2008, 18:42:55