Recent Submissions

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  Unified formalism for non-autonomous mechanical systems 

  Barbero Liñán, María; Echeverría Enríquez, Arturo; Martín de Diego, David; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (AIP, 2008-06-01)
  Working paper
  Open Access

  We present a unified geometric framework for describing both the Lagrangian and Hamiltonian formalisms of regular and non-regular time-dependent mechanical systems, which is based on the approach of Skinner and Rusk (1983). ...
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  Constraint algorithm for k-presymplectic Hamiltonian systems. Application to singular field theories 

  Gràcia Sabaté, Francesc Xavier; Martín Grillo, Rubén; Román Roy, Narciso (2009-03-10)
  Working paper
  Open Access

  The k-symplectic formulation of field theories is especially simple, since only tangent and cotangent bundles are needed in its description. Its defining elements show a close relationship with those in the symplectic ...