EGSA - Equacions Diferencials, Geometria, Sistemes Dinàmics i de Control, i Aplicacions: Enviaments recents

Ara es mostren els items 13-24 de 606

    • Matrices positivas y aplicaciones 

      García Planas, María Isabel (Maria Isabel Garcia Planas, 2008-09-01)
      Llibre
      Accés obert

    • Credit risk contributions under the Vasicek one-factor model: a fast wavelet expansion approximation 

      Masdemont Soler, Josep; Ortiz-Gracia, Luis (2014-06)
      Article
      Accés obert
      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
      Accés obert
      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. ...

    • Action-angle variables and a KAM theorem for b-Poisson manifolds 

      Kiesenhofer, Anna; Miranda Galcerán, Eva; Scott, Geoffrey (2015-02)
      Report de recerca
      Accés obert
      In this article we prove an action-angle theorem for b-integrable systems on b-Poisson manifolds improving the action-angle theorem contained in [LMV11] for general Poisson manifolds in this setting. As an application, we ...

    • Structural stability of planar bimodal linear systems 

      Ferrer Llop, Josep; Peña Carrera, Marta; Susín Sánchez, Antonio (2014-01-01)
      Article
      Accés obert
      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
      Accés obert

    • Low degree equations for phylogenetic group-based models 

      Casanellas Rius, Marta; Fernández Sánchez, Jesús; Michalek, Mateusz (2015)
      Article
      Accés obert
      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 ...

    • Multi-agent linear dynamical systems, analyzing the consensus problem 

      García Planas, María Isabel (2014)
      Text en actes de congrés
      Accés obert
      In this paper the consensus problem is considered for multi-agent systems having an independent agent and fixed topology.

    • 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
      Accés restringit per política de l'editorial
      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 ...

    • Sufficient conditions for controllability and observability of serial and parallel concatenated linear systems 

      García Planas, María Isabel; Domínguez García, José Luis; Um, Laurence Emilie (2014-11-30)
      Article
      Accés obert
      This paper deals with the sufficient conditions for controllability and observability characters of finitedimensional linear continuous-time-invariant systems of serial and parallel concatenated systems. The obtained ...

    • Xiao's conjuecture for general fibred surfaces 

      Barja Yáñez, Miguel Ángel; González Alonso, Víctor; Naranjo del Val, Joan Carles (2014-01-10)
      Report de recerca
      Accés obert
      We prove that the genus g, the relative irregularity q_f and the Clifford index c_f of a non-isotrivial fibration f satisfy the inequality q_f=g-c_f. This gives in particular a proof of Xiao’s conjecture for fibrations ...

    • Stability and singularities of relative hypersurfaces 

      Barja Yáñez, Miguel Ángel; Stoppino, Lidia (2014-07-30)
      Report de recerca
      Accés obert
      We study relative hypersurfaces, and prove an instability condition for the fibres. This is the starting point for an investigation of the geometry of effective divisors on relative projective bundles.