Recent Submissions

  • Automorphisms and reduction of Heegner points on Shimura curves at Cerednik-Drinfeld primes 

    Molina Blanco, Santiago; Rotger Cerdà, Víctor (2014)
    Article
    Open Access
    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
    Open Access
    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
    Restricted access - publisher's policy
    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 ...
  • El programa Ciencia en Acción. Entrevista a Rosa M. Ros, directora del programa 

    Alsina Aubach, Montserrat (Societat Catalana de Matemàtiques (SCM), 2015-02)
    Article
    Open Access
  • Nuno Freitas, premi José Luis Rubio de Francia de la RSME 

    Alsina Aubach, Montserrat (Societat Catalana de Matemàtiques (SCM), 2015-12)
    Article
    Open Access
  • Pilar Bayer, medalla d'honor 2015 de la Xarxa Vives 

    Alsina Aubach, Montserrat (Societat Catalana de Matemàtiques (SCM), 2015-12)
    Article
    Open Access
  • Frobenius distribution for quotients of Fermat curves of prime exponent 

    Fité, Francesc; González Rovira, Josep; Lario Loyo, Joan Carles (2015-06-18)
    Article
    Restricted access - publisher's policy
    Let C denote the Fermat curve over Q of prime exponent l. The Jacobian Jac(C) of C splits over Q as the product of Jacobians Jac(C_k), 0< k < l-1, where C_k are curves obtained as quotients of C by certain subgroups of ...
  • Modular forms with large coefficient fields via congruences 

    Dieulefait, Luis; Jiménez Urroz, Jorge; Ribet, Keneth (Springer, 2015-05-01)
    Article
    Open Access
    We use the theory of congruences between modular forms to prove the existence of newforms with square-free level having a fixed number of prime factors such that the degree of their coefficient fields is arbitrarily large. ...
  • On the Galois correspondence theorem in separable Hopf Galois theory 

    Crespo Vicente, Teresa; Río Doval, Ana; Vela del Olmo, Mª Montserrat (2016-01)
    Article
    Open Access
    In this paper we present a reformulation of the Galois correspondence theorem of Hopf Galois theory in terms of groups carrying farther the description of Greither and Pareigis. We prove that the class of Hopf Galois ...
  • From Galois to Hopf Galois: theory and practice 

    Crespo Vicente, Teresa; Río Doval, Ana; Vela del Olmo, Mª 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 ...

View more