Now showing items 1-20 of 82

  • A characterization of isochronous centres in terms of symmetries 

    Freire, Emilio; Gasull Embid, Armengol; Guillamon Grabolosa, Antoni (2000)
    Article
    Open Access
    We present a description of isochronous centres of planar vector fields $X$ by means of their groups of symmetries. More precisely, given a normalizer $U$ of $X$ (i.e., $[X,U]=\mu X$, where $\mu$ is a scalar function), we ...
  • A computational and geometric approach to phase resetting curves and surfaces 

    Guillamon Grabolosa, Antoni; Huguet Casades, Gemma (2009)
    Article
    Open Access
  • aCTeX: Autoaprenentatge científico-tècnic en xarxa 

    Guillamon Grabolosa, Antoni; Ferrer, Albert (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2007-06-28)
    Conference report
    Open Access
    aCTeX és una aplicació web que genera dinàmicament llistats de preguntes tipus test, amb la particularitat que admet expressions matemàtiques introduïdes en llenguatge LaTeX a la base de dades. L’aplicació executa la ...
  • A drone based system for surveillance applications in coastal zone 

    Cantero, Adrián; Gallego, David; López, Pedro; Molina, Rafael; Sánchez, Gonzalo; Sueldo, Agustín; Guerrero, Antonio; Guillamon Grabolosa, Antoni (SARTI, 2015)
    Article
    Open Access
    This paper introduces an unmanned aircraft vehicle (multicopter) for coastal applications. This vehicle has surveillance purposes, and it is configured with routes in such a way that the vehicle is capable of displaying ...
  • An analytic-numerical method of computation of the Liapunov and period constants derived from their algebraic structure 

    Gasull Embid, Armengol; Guillamon Grabolosa, Antoni; Mañosa Fernández, Víctor (1996)
    Article
    Open Access
    We consider the problem of computing the Liapunov and the period constants for a smooth differential equation with a non degenerate critical point. First, we investigate the structure of both constants when they are ...
  • An explicit expression of the first Liapunov and period constants with applications 

    Gasull Embid, Armengol; Guillamon Grabolosa, Antoni; Mañosa Fernández, Víctor (1996)
    Article
    Open Access
    In this paper, we study systems in the plane having a critical point with pure imaginary eigenvalues, and we search for effective conditions to discern whether this critical point is a focus or a center; in the case of it ...
  • A pseudo-normal form for planar vector fields 

    Delshams Valdés, Amadeu; Guillamon Grabolosa, Antoni; Lázaro Ochoa, José Tomás (2001)
    Article
    Open Access
  • Bifurcation gaps in asymmetric and high-dimensional hypercycles 

    Puig, Júlia; Farre, Gerard; Guillamon Grabolosa, Antoni; Fontich Julia, Ernest; Sardanyes, Josep (2018-01-01)
    Article
    Open Access
    Hypercycles are catalytic systems with cyclic architecture. These systems have been suggested to play a key role in the maintenance and increase of information in prebiotic replicators. It is known that for a large enough ...
  • Bifurcations analysis of oscillating hypercycles 

    Guillamon Grabolosa, Antoni; Fontich, Ernest; Sardañés, Josep (2015-12-21)
    Article
    Open Access
    We investigate the dynamics and transitions to extinction of hypercycles governed by periodic orbits. For a large enough number of hypercycle species (n > 4) the existence of a stable periodic orbit has been previously ...
  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2011-11-23)
    Exam
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2012-01-13)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2012-01-13)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2011-11-30)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2012-01-13)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2011-11-02)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2011-11-23)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2011-12-20)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2011-11-30)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2013-12-04)
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  • CÀLCUL (1r quadrimestre) 

    Guillamon Grabolosa, Antoni (Universitat Politècnica de Catalunya, 2013-10-02)
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