Now showing items 1-20 of 25

    • ALGEBRA 1 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-06-29)
      Exam
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    • ÀLGEBRA 1 (Examen 1r quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-01-09)
      Exam
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    • ÀLGEBRA 1 (Examen 1r quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-01-09)
      Exam
      Restricted access to the UPC academic community
    • ÀLGEBRA 1 (Examen 1r quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2006-01-10)
      Exam
      Restricted access to the UPC academic community
    • ÀLGEBRA 1 (Examen 1r quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2005-01-21)
      Exam
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    • ÀLGEBRA ABSTRACTA 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2012-01-13)
      Exam
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    • ÀLGEBRA ABSTRACTA 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2011-11-03)
      Exam
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    • ÀLGEBRA ABSTRACTA (Examen 1er quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2006-10-31)
      Exam
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    • ÀLGEBRA ABSTRACTA (Examen 1r quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-01-16)
      Exam
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    • ÀLGEBRA ABSTRACTA (Examen 1r quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-10-31)
      Exam
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    • CRIPTOGRAFIA (Examen 1r quadrim.) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2002-01-09)
      Exam
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    • CRIPTOGRAFIA (Examen 2n quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-05-31)
      Exam
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    • CRIPTOGRAFIA (Examen 2n quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-05-31)
      Exam
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    • CRIPTOGRAFIA (Examen 2n quadrim) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2004-06-04)
      Exam
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    • Criptografia (examen 2n quadrimestre) 

      Río Doval, Ana (Universitat Politècnica de Catalunya, 2007-05-31)
      Exam
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    • Criptografia: L’aritmètica dels nombres grans 

      Río Doval, Ana (2021-05-27)
      Audiovisual
      Open Access
      Les demandes computacionals dels nostres sistemes criptogràfics giren a l’entorn de l’aritmètica amb nombres enters grans, típicament de com a mínim 2048 bits (617 dígits decimals) si parlem de sistemes basats en la ...
    • From Galois to Hopf Galois: theory and practice 

      Crespo Vicente, Teresa; Río Doval, Ana; Vela del Olmo, Maria Montserrat (2015-09)
      Article
      Open Access
      Hopf Galois theory expands the classical Galois theory by con- sidering the Galois property in terms of the action of the group algebra k [ G ] on K/k and then replacing it by the action of a Hopf algebra. We review the ...
    • Hopf Galois structures on symmetric and alternating extensions 

      Río Doval, Ana; Vela del Olmo, Maria Montserrat; Crespo Vicente, Teresa (2018)
      Article
      Open Access
      By using a recent theorem by Koch, Kohl, Truman and Underwood on normality, we determine that some types of Hopf Galois structures do not occur on Galois extensions with Galois group isomorphic to alternating or symmetric ...
    • Induced Hopf Galois structures 

      Crespo Vicente, Teresa; Río Doval, Ana; Vela del Olmo, Maria Montserrat (2016-07-01)
      Article
      Open Access
      For a ¿nite Galois extension K/k and an intermediate ¿eld F such that Gal(K/F)has a normal complement in Gal(K/k), we construct and characterize Hopf Galois structures on K/k which are induced by a pair of Hopf Galois ...
    • Non-isomorphic Hopf Galois structures with isomorphic underlying Hopf algebras 

      Crespo, Teresa; Río Doval, Ana; Vela del Olmo, Maria Montserrat (2014-10-30)
      Article
      Restricted access - publisher's policy
      We give a degree 8 non-normal separable extension having two non-isomorphic Hopf Galois structures with isomorphic underlying Hopf algebras.