Archiv der Mathematik

, Volume 85, Issue 4, pp 318–326 | Cite as

On tense modules for extended algebras over rational fields

  • R. Bautista
  • L. Salmerón
Original Paper


Let k(x) be the field of fractions of the polynomial algebra k[x] over the field k. We prove that, for an arbitrary finite dimensional k-algebra Λ, any finitely generated Λ ⊗ k  k(x)-module M such that its minimal projective presentation admits no non-trivial selfextension is of the form M ≅ Nk(x), for some finitely generated Λ-module N. Some consequences are derived for tilting modules over the rational algebra Λ ⊗ k  k(x) and for some generic modules for Λ.

Mathematics Subject Classification (2000).

Primary 16A46 16A53 Secondary 15A21 


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Copyright information

© Birkhäuser Verlag, Basel 2005

Authors and Affiliations

  1. 1.Instituto de MatemáticasUNAM, Unidad MoreliaMoreliaMéxico

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