Enviaments recents

  • Constraints on the automorphism group of a curve 

    González Rovira, Josep (2017-01-01)
    Article
    Accés obert
    For a curve of genus > 1 defined over a finite field, we present a sufficient criterion for the non-existence of automorphisms of order a power of a rational prime. We show how this criterion can be used to determine the ...
  • Automorphism group of split Cartan modular curves 

    González Rovira, Josep (2016-08-01)
    Article
    Accés obert
  • Functions and differentials on the non-split Cartan modular curve of level 11 

    Fernández González, Julio; González Rovira, Josep (2017-01-01)
    Article
    Accés obert
    The genus 4 modular curve Xns(11) attached to a non-split Cartan group of level 11 admits a model defined over Q. We compute generators for its function field in terms of Siegel modular functions. We also show that its ...
  • 30 anys del Seminari de Teoria de Nombres de Barcelona, STNB 2016 

    Alsina Aubach, Montserrat (Societat Catalana de Matemàtiques (SCM), 2016-07)
    Article
    Accés obert
    Realitzat a/amb:  Universitat de Barcelona
  • El projecte 7demates 

    Alsina Aubach, Montserrat (Societat Catalana de Matemàtiques (SCM), 2016-07)
    Article
    Accés obert
  • Induced Hopf Galois structures 

    Crespo Vicente, Teresa; Río Doval, Ana; Vela del Olmo, Mª Montserrat (2016-07-01)
    Article
    Accés restringit per política de l'editorial
    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 ...
  • Entrevista a Nuno Freitas, Premio José Luis Rubio de Francia 2014 

    Alsina Aubach, Montserrat (Real Sociedad Matemática Española, 2015)
    Article
    Accés obert
  • Automorphisms and reduction of Heegner points on Shimura curves at Cerednik-Drinfeld primes 

    Molina Blanco, Santiago; Rotger Cerdà, Víctor (2014)
    Article
    Accés obert
    The aim of this short note is to show how the interplay of the action of the automorphism group of a Shimura curve on the special fiber of its Cerednik-Drinfeld’s integral model at a prime of bad reduction and its sets ...
  • The kernel of Ribet’s isogeny for genus three Shimura curves 

    Molina Blanco, Santiago; González Rovira, Josep (2015)
    Article
    Accés obert
    There are exactly nine reduced discriminants D of indefinite quaternion algebras over Q for which the Shimura curve XD attached to D has genus 3. We present equations for these nine curves. Moreover, for each D we determine ...
  • Fuchsian codes with arbitrarily high code rates 

    Blanco Chacón, Iván; Hollanti, Camilla; Alsina Aubach, Montserrat; Remón Adell, Dionís (2016-01-01)
    Article
    Accés restringit per política de l'editorial
    Recently, Fuchsian codes have been proposed in Blanco-Chacon et al. (2014) [2] for communication over channels subject to additive white Gaussian noise (AWGN). The two main advantages of Fuchsian codes are their ability ...

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