Ara es mostren els items 51-61 de 61

    • Nonreal eigenvalues for second order differential operators on networks with circuits 

      Lubary Martínez, José Antonio; Solà-Morales Rubió, Joan de (2001)
      Article
      Accés obert
    • On maps with given jacobians involving the heat equation 

      Avinyó Andrés, Albert; Solà-Morales Rubió, Joan de; València Guitart, Marta (2000)
      Article
      Accés obert
      In this paper we presennt and analyze two new algorithms to construct a smooth diffeomorphism of a domain with prescribed jacobian function. The first one is free from any restriction on the boundary, while the second ...
    • On the diffusion algorithm for density-equalizing maps with piecewise constant initial data 

      Avinyó Andrés, Albert; Solà-Morales Rubió, Joan de; València Guitart, Marta (2012-07-15)
      Article
      Accés restringit per política de l'editorial
      We mathematically analyze the diffusion-based algorithm to produce maps with a given Jacobian, introduced independently by M. T. Gastner and M. E. J. Newman (2004) and ourselves (2003), but in particular cases where the ...
    • On the number and Indices of equilibria in a space-dependent bistable equation 

      Salazar, Domingo; Solà-Morales Rubió, Joan de (1999)
      Article
      Accés obert
      We study a singular perturbation problem of a piecewise autonomous bistable equation. We give sufficient conditions both for the boundedness and the unboundedness of the number and Morse index of its equilibrium solutions ...
    • Optimal scalar products in the Moore-Gibson-Thompson equation 

      Pellicer, Marta; Solà-Morales Rubió, Joan de (2019-03-01)
      Article
      Accés obert
      We study the third order in time linear dissipative wave equation known as the Moore-Gibson-Thompson equation, that appears as the linearization of a the Jordan-Moore-Gibson-Thompson equation, an important model in nonlinear ...
    • Principis matemàtics de la mecànica de fluids. Lliçó inaugural Curs Box (2023-2024) 

      Solà-Morales Rubió, Joan de (2023-10-11)
      Audiovisual
      Accés obert
      Acte inici de curs FME 2023-2024 amb la lliçó inaugural del professor Joan Solà-Morales Dimecres 11 d'octubre a les 12.30 h a la sala d’actes de la Facultat tindrà lloc la lliçó inaugural del #CursBoxFME 2023-2024 amb ...
    • Safe trajectory of a piece moved by a robot 

      Babb, Thomas; Benedito Benet, Ernest; Bond, Oliver; Kumar, Sandeep; Pacha Andújar, Juan Ramón; Solà-Morales Rubió, Joan de (Springer, 2023-07-12)
      Capítol de llibre
      Accés obert
      In this work, we propose a mathematical model for a physical problem based on the movement of a metal piece held by a robot. Using the principles of Kirchoff plate theory, a set of equations determining stresses and ...
    • Smooth linearization for a saddle on Banach spaces 

      Munhoz Rodrigues, Hildebrando; Solà-Morales Rubió, Joan de (2003)
      Article
      Accés obert
      As a continuation of a previous work on linearization of class C1 of diffeomorphisms and flows in infinite dimensions near a fixed point, in this work we deal with the case of a saddle point with some non-resonance restrictions ...
    • Some non-selfadjoint problems on the circle 

      Lubary Martínez, José Antonio; Solà-Morales Rubió, Joan de (1998)
      Article
      Accés obert
      The non-selfadjoint nature of some second order differential equations with periodic boundary conditions is exhibited by describing properties of its spectrum, such as geometric and algebraic multiplicities and existence ...
    • Stability of local minima and stable nonconstant equilibria 

      Consul Porras, M. Nieves; Solà-Morales Rubió, Joan de (1998)
      Article
      Accés obert
    • Stability problems in nonautonomous linear differential equations in infinite dimensions 

      Munhoz Rodrigues, Hildebrando; Solà-Morales Rubió, Joan de; Nakassima, G. K. (2020-06-01)
      Article
      Accés obert
      In this paper we study the robustness of the stability in nonautonomous linear ordinary differential equations under integrally small perturbations in infinite dimensional Banach spaces. Some applications are obtained to ...