Recent Submissions

  • Traveling wave solutions in a half-space for boundary reactions 

    Cabré Vilagut, Xavier; Consul Porras, M. Nieves; Mande Nieto, José Vicente (2015-01-01)
    Article
    Open Access
    We prove the existence and uniqueness of a traveling front and of its speed for the homogeneous heat equation in the half-plane with a Neumann boundary reaction term of unbalanced bistable type or of combustion type. We ...
  • Quasimatter domination parameters in bouncing cosmologies 

    Elizalde, Emilio; Haro Cases, Jaume; Odintsov, Sergei D. (American Physical Society, 2015-03-19)
    Article
    Open Access
    A fine set of parameters is introduced for bouncing cosmologies in order to describe the nearly matterdominated phase, and which play the same role that the usual slow-roll parameters play in inflationary cosmology. It is ...
  • Generic bifurcations of low codimension of planar Filippov Systems 

    Martínez-Seara Alonso, M. Teresa; Guàrdia Munarriz, Marcel; Teixeira, Marco Antonio (2011-02)
    Article
    Restricted access - publisher's policy
    In this article some qualitative and geometric aspects of non-smooth dynamical systems theory are discussed. The main aim of this article is to develop a systematic method for studying local(and global) bifurcations in ...
  • Credit risk contributions under the Vasicek one-factor model: a fast wavelet expansion approximation 

    Masdemont Soler, Josep; Ortiz-Gracia, Luis (2014-06)
    Article
    Open Access
    To measure the contribution of individual transactions inside the total risk of a credit portfolio is a major issue in financial institutions. VaR Contributions (VaRC) and Expected Shortfall Contributions (ESC) have become ...
  • Com les Varietats Invariants formen Espirals i Anells en Galàxies barrades 

    Romero Gómez, Mercè; Sánchez-Martín, Patricia; Masdemont Soler, Josep (2014)
    Article
    Open Access
    L'espectacularitat de les galàxies barrades consisteix no solament en la presència de la barra, allargada en el centre de la galàxia, sinó també en els braços espirals o anells que es desenvolupen en les parts exteriors. ...
  • Structural stability of planar bimodal linear systems 

    Ferrer Llop, Josep; Peña Carrera, Marta; Susín Sánchez, Antonio (2014-01-01)
    Article
    Open Access
    Structural stability ensures that the qualitative behavior of a system is preserved under small perturbations. We study it for planar bimodal linear dynamical systems, that is, systems consisting of two linear dynamics ...
  • EMtree for phylogenetic topology reconstruction on nonhomogeneous data 

    Ibáñez Marcelo, Esther; Casanellas Rius, Marta (2014-06-17)
    Article
    Open Access
  • Low degree equations for phylogenetic group-based models 

    Casanellas Rius, Marta; Fernández Sánchez, Jesús; Michalek, Mateusz (2014-08-03)
    Article
    Open Access
    Motivated by phylogenetics, our aim is to obtain a system of low degree equations that define a phylogenetic variety on an open set containing the biologically meaningful points. In this paper we consider phylogenetic ...
  • On the integrability of polynomial vector fields in the plane by means of Picard-Vessiot theory 

    Acosta Humánez, Primitivo Belén; Lázaro Ochoa, José Tomás; Morales Ruiz, Juan José; Pantazi, Chara (2015-05-01)
    Article
    Restricted access - publisher's policy
    We study the integrability of polynomial vector fields using Galois theory of linear differential equations when the associated foliations is reduced to a Riccati type foliation. In particular we obtain integrability results ...
  • Layer solutions for the fractional Laplacian on hyperbolic space: existence, uniqueness and qualitative properties 

    González Nogueras, María del Mar; Saéz, Mariel; Sire, Yannick (2014-12-01)
    Article
    Restricted access - publisher's policy
    We investigate the equation; (-Delta(Hn))(gamma) w = f(w) in H-n,; where (-Delta(Hn))(gamma) corresponds to the fractional Laplacian on hyperbolic space for gamma is an element of(0, 1) and f is a smooth nonlinearity that ...

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