Ara es mostren els items 53-72 de 108

    • Hamilton-Jacobi theory and the evolution operator 

      Cariñena Marzo, José Fernando; Gràcia Sabaté, Francesc Xavier; Martínez Fernández, Eduardo; Marmo, Giuseppe; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (Universidad de Zaragoza, Prensas Universitarias de Zaragoza, 2009)
      Capítol de llibre
      Accés obert
      We present a new setting of the geometric Hamilton-Jacobi theory by using the so-called time-evolution operator K. This new approach unifies both the Lagrangian and the Hamiltonian formulation of the problem developed in ...
    • Hamilton-Jacobi theory and the evolution operator 

      Cariñena, José F.; Gràcia Sabaté, Francesc Xavier; Martínez, Eduardo; Marmo, Giuseppe; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (Prensas Univ. Zaragoza, 2009-04)
      Capítol de llibre
      Accés obert
      We present a new setting of the geometric Hamilton-Jacobi theory by using the so-called time-evolution operator K. This new approach unifies both the Lagrangian and the Hamiltonian formulation of the problem developed in ...
    • Hamilton-Jacobi theory in multisymplectic classical field theories 

      De León, Manuel; Prieto Martínez, Pedro Daniel; Román Roy, Narciso; Vilariño Fernández, Silvia (2017-09-01)
      Article
      Accés obert
      The geometric framework for the Hamilton-Jacobi theory developed in the studies of Carinena et al. [Int. J. Geom. Methods Mod. Phys. 3(7), 1417-1458 (2006)], Carinena et al. [Int. J. Geom. Methods Mod. Phys. 13(2), 1650017 ...
    • Hamilton-Jacobi theory in multisymplectic classical field theories 

      de León, Manuel; Prieto Martínez, Pedro Daniel; Román Roy, Narciso; Vilariño, Silvia (2015-04-08)
      Report de recerca
      Accés obert
      The geometric framework for the Hamilton-Jacobi theory developed in [14, 17, 39] is extended for multisymplectic first-order classical field theories. The Hamilton-Jacobi problema is stated for the Lagrangian and the ...
    • Hamiltonian Systems in Multisymplectic Field Theories 

      Echeverría Enríquez, Arturo; León, Manuel de; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (2005-06-20)
      Article
      Accés obert
      We consider Hamiltonian systems in first-order multisymplectic field theories. First we review the construction and properties of Hamiltonian systems in the so-called restricted multimomentum bundle using Hamiltonian ...
    • Higher-order Cartan symmetries in k-symplectic field theory 

      Román Roy, Narciso; Salgado, Modesto; Vilariño, Silvia (2008-04-30)
      Article
      Accés obert
      For k-symplectic Hamiltonian field theories, we study infinitesimal transformations generated by certain kinds of vector fields which are not Noether symmetries, but which allow us to obtain conservation laws by means ...
    • Higher-order contact mechanics 

      De León, Manuel; Gaset Rifà, Jordi; Lainz Valcázar, Manuel; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (Elsevier, 2021-02-01)
      Article
      Accés obert
      We present a complete theory of higher-order autonomous contact mechanics, which allows us to describe higher-order dynamical systems with dissipation. The essential tools for the theory are the extended higher-order tangent ...
    • Higher-order mechanics: variational principles and other topics 

      Prieto Martínez, Pedro Daniel; Román Roy, Narciso (American Institute of Mathematical Sciences, 2013-12)
      Article
      Accés obert
      After reviewing the Lagrangian-Hamiltonian unified formalism (i.e, the Skinner-Rusk formalism) for higher-order (non-autonomous) dynamical systems, we state a unified geometrical version of the Variational Principles which ...
    • k-cosymplectic formalism in classical field theory: the Skinner–Rusk approach 

      Rey, Angel M.; Román Roy, Narciso; Salgado, Modesto (2006-02-14)
      Article
      Accés obert
      The k-cosymplectic Lagrangian and Hamiltonian formalisms of first-order field theories are reviewed and completed. In particular they are stated for singular almost-regular systems. After that, both formalisms are unified ...
    • Lagrangian-Hamiltonian unified formalism for autonomous higher order dynamical systems 

      Prieto Martínez, Pedro Daniel; Román Roy, Narciso (2011-09-23)
      Article
      Accés restringit per acord de confidencialitat
      The Lagrangian-Hamiltonian unified formalism of R. Skinner and R. Rusk was originally stated for autonomous dynamical systems in classical mechanics. It has been generalized for non-autonomous first-order mechanical ...
    • Lagrangian-Hamiltonian unified formalism for autonomous higher-order dynamical systems 

      Prieto Martínez, Pedro Daniel; Román Roy, Narciso (2011-07-18)
      Report de recerca
      Accés restringit per acord de confidencialitat
      Research paper
    • Lie-algebroid formulation of k-cosymplectic classical field theories 

      Román Roy, Narciso; Salgado, Modesto; Vilariño, Silvia (2009)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The k-cosymplectic formalism is the generalization to field theories of the cosymplectic formalism, which is the geometric framework for describing non-autonomous dynamical systems. In [5], A. Weinstein introduced a new ...
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2012-03-30)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2015-04-16)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2012-06-08)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2014-06-02)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2013-06-14)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2015-07-01)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2015-05-29)
      Examen
      Accés restringit a la comunitat UPC
    • MODELS MATEMÀTICS DE LA FÍSICA 

      Román Roy, Narciso (Universitat Politècnica de Catalunya, 2014-04-03)
      Examen
      Accés restringit a la comunitat UPC