Ara es mostren els items 1-20 de 33

    • CÀLCUL NUMÈRIC 

      Pacha Andújar, Juan Ramón (Universitat Politècnica de Catalunya, 2020-11-02)
      Examen
      Accés restringit a la comunitat UPC
    • CÀLCUL NUMÈRIC 

      Pacha Andújar, Juan Ramón (Universitat Politècnica de Catalunya, 2021-01-15)
      Examen
      Accés restringit a la comunitat UPC
    • Càlcul numèric : manual de pràctiques 

      Lázaro Ochoa, José Tomás; Ollé Torner, Mercè; Pacha Andújar, Juan Ramón (Universitat Politècnica de Catalunya, 2014)
      Pràctica
      Accés obert
    • CÀLCUL NUMÈRIC | EXTRAORDINARI 

      Pacha Andújar, Juan Ramón (Universitat Politècnica de Catalunya, 2023-07-04)
      Examen
      Accés restringit a la comunitat UPC
    • CÀLCUL NUMÈRIC | FINAL 

      Pacha Andújar, Juan Ramón (Universitat Politècnica de Catalunya, 2022-01-15)
      Examen
      Accés restringit a la comunitat UPC
    • CÀLCUL NUMÈRIC | PARCIAL 

      Pacha Andújar, Juan Ramón (Universitat Politècnica de Catalunya, 2021-11-04)
      Examen
      Accés restringit a la comunitat UPC
    • Càlcul numèric. Manual de pràctiques 

      Lázaro Ochoa, José Tomás; Ollé Torner, Mercè; Pacha Andújar, Juan Ramón (2014-07)
      Report de recerca
      Accés obert
    • Confinement around the Vertical Family of Periodic Orbits close L<sub>4</sub> and L<sub>5</sub> 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (2001)
      Article
      Accés obert
      We consider the spatial restricted three body problem (RTBP) for values of the mass parameter close to µRouth. We analyse the dynamics around the vertical periodic orbits which are born at the equilateral equilibrium ...
    • Controllability of continuous bimodal linear systems 

      Ferrer Llop, Josep; Pacha Andújar, Juan Ramón; Peña Carrera, Marta (2013-05-01)
      Article
      Accés obert
      We consider bimodal linear systems consisting of two linear dynamics acting on each side of a given hyperplane, assuming continuity along the separating hyperplane. We prove that the study of controllability can be reduced ...
    • Description of characteristic non-hyperinvariant subspaces in GF(2) 

      Mingueza, David; Montoro López, María Eulalia; Pacha Andújar, Juan Ramón (Elsevier, 2013-12-16)
      Article
      Accés restringit per política de l'editorial
      Given a square matrix A , an A -invariant subspace is called hyperinvariant (respectively, characteristic) if and only if it is also invariant for all matrices T (respectively, nonsingular matrices T ) that commute ...
    • Description of characteristic non-hyperinvariant subspaces over the field GF(2) 

      Mingueza, David; Montoro López, María Eulalia; Pacha Andújar, Juan Ramón (Elsevier, 2013-10-26)
      Article
      Accés restringit per política de l'editorial
      Given a square matrix A, an A-invariant subspace is called hyperinvariant (respectively, characteristic) if and only if it is also invariant for all matrices T (respectively, nonsingular matrices T) that commute with A. ...
    • Dynamics and bifurcation near the transition from stability to complex instability 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (2001)
      Article
      Accés obert
    • Dynamics and bifurcation near the transition from stability to complex instability: an analytical approach using normal forms 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (1998)
      Article
      Accés obert
      We consider a Hamiltonian of three degrees of freedom and a family of periodic orbits with a transition from stability to complex instability, such that there is an irrational collision of the Floquet eigenvalues of opposite ...
    • Dynamics close to a non semi-simple 1: -1 resonant periodic orbit. 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (2003)
      Article
      Accés obert
      In this work, our target is to analyze the dynamics around the $1:-1$ resonance which appears when a family of periodic orbits of a real analytic three-degree of freedom Hamiltonian system changes its stability from ...
    • Hopf bifurcation for the hydrogen atom in a circularly polarized microwave field 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón (2018-09-01)
      Article
      Accés obert
      We consider the Rydberg electron in a circularly polarized microwave field, whose dynamics is described by a Hamiltonian depending on one parameter, K¿>¿0. The corresponding Hamiltonian system of ODE has two equilibrium ...
    • How does the hopf bifurcation appear in the hydrogen atom in a Circularly Polarized (CP) microwave field? 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón (Birkhäuser, 2019)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The dynamics of the Rydberg atom in a rotating electric field can be described by a two degree of freedom Hamiltoniandepending on a parameterK. This Hamiltonian has two equilibrium pointsL1andL2. WhileL1is a saddle-center ...
    • KAM aspects of the quasi-periodic Hamiltonian Hopf bifurcation: summary of results 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (s.n., 2007-08-20)
      Text en actes de congrés
      Accés obert
      In this work we consider a 1:-1 non semi-simple resonant periodic orbit of a three-degrees of freedom real analytic Hamiltonian system. From the formal analysis of the normal form, it is proved the branching off a ...
    • KAM aspects of the quasiperiodic Hamiltonian Hopf bifurcation 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (2004)
      Article
      Accés obert
      In this work we consider a normal form around a 1:-1 non semi-simple resonant periodic orbit of a three-degree of freedom Hamiltonian system. From the formal analysis it can be proved the branching off a two-parameter ...
    • Miniversal Deformations of Bimodal Picewise Linear Systems 

      Ferrer Llop, Josep; Magret Planas, Maria dels Dolors; Pacha Andújar, Juan Ramón; Peña Carrera, Marta (Servicio de publicaciones de la UPV, 2010)
      Comunicació de congrés
      Accés obert
      Bimodal linear systems are those consisting of two linear systems on each side of a given hyperplane, having continuous dynamics along that hyperplane. In this work, we focus on the derivation of (orthogonal) miniversal ...
    • Motion close to the hopf bifurcation of the vertical family of periodic orbits of L^4 

      Ollé Torner, Mercè; Pacha Andújar, Juan Ramón; Villanueva Castelltort, Jordi (2003)
      Article
      Accés obert
      The paper deals with different kinds of invariant motions (periodic orbits, 2D and 3D invariant tori and invariant manifolds of periodic orbits) in order to analyze the Hamiltonian direct Hopf bifurcation that takes place ...