Exploració per autor "Delshams Valdés, Amadeu"
Ara es mostren els items 70-86 de 86
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Shadowing of non-transversal heteroclinic chains
Delshams Valdés, Amadeu; Simon, Adriá; Zgliczynski, Piotr (2017-12-01)
Article
Accés obert© 2017 Elsevier Inc. We present a new result about the shadowing of non-transversal chain of heteroclinic connections based on the idea of dropping dimensions. We illustrate this new mechanism with several examples. As an ... -
Simulation of non-linear flow density in transition state from the mathematical model of the diffusion of metal anions through a flat sheet supported liquid membrane
Benzal, Ma. Graciela; Kumar, Aditya; Sastre Requena, Ana María; Delshams Valdés, Amadeu (2003)
Article
Accés obertA mathematical model is developed for the carrier facilitated transport of metal ions through a flat sheet support liquid membrane (FSSLM) in transition state from Fick’s second law. From this model, and from Fick’s first ... -
Singular separatrix splitting and Melnikov method: An experimental study
Delshams Valdés, Amadeu; Ramírez Ros, Rafael (1998)
Article
Accés obertWe consider families of analytic area-preserving maps depending on two pa- rameters: the perturbation strength E and the characteristic exponent h of the origin. For E=0, these maps are integrable with a separatrix to ... -
Singular separatrix splitting and the Poincare-Melnikov method for area preserving maps
Delshams Valdés, Amadeu; Ramírez Ros, Rafael (1999)
Article
Accés obertThe splitting of separatrices of area preserving maps close to the identity is one of the most paradigmatic examples of an exponentially small or singular phenomenon. The intrinsic small parameter is the characteristic ... -
Singular splitting of separatrices for the perturbed McMillan map
Delshams Valdés, Amadeu; Ramírez Ros, Rafael (1998)
Article
Accés obert -
Splitting and melnikov potentials in hamiltonian systems
Delshams Valdés, Amadeu; Gutiérrez Serrés, Pere (2000)
Article
Accés obert -
Splitting of separatrices for (fast) quasiperiodic forcing
Delshams Valdés, Amadeu; Gelfreich, Vassili; Jorba, Angel; Martínez-Seara Alonso, M. Teresa (1996)
Article
Accés obertWe consider fast quasiperiodic perturbations of a pendulum with two frequencies $(1,\gamma)$, where $\gamma$ is the golden mean number. For small perturbations such that its Fourier coefficients (the ones associated to ... -
Splitting of separatrices in Hamiltonian systems and symplectic maps
Delshams Valdés, Amadeu; Martínez-Seara Alonso, M. Teresa; Ramírez Ros, Rafael (1997)
Article
Accés obertPoincar\'e, Melnikov and Arnol'd introduced the standard method for measuring the splitting of separatrices of Hamiltonian systems. It is based on the study of the zeros of the so-called Melnikov integral, a vectorial ... -
Splitting of separatrices in Hamiltonian systems with one and a half degrees of freedom
Delshams Valdés, Amadeu; Martínez-Seara Alonso, M. Teresa (1997)
Article
Accés obertThe splitting of separatrices for Hamiltonians with $1{1\over 2}$ degrees of freedom $$ h(x,t /\varepsilon ) = h^{0}(x) + \mu \varepsilon ^{p} h^{1}(x,t /\varepsilon ) $$ is measured. We assume that $ h^{0}(x)= h^{0}(x_{1},x_{2})= ... -
Splitting potential and Poincaré-Melnikov method for whiskered tori in Hamiltonian Systems
Delshams Valdés, Amadeu; Gutiérrez Serrés, Pere (1999)
Article
Accés obertWe deal with a perturbation of a hyperbolic integrable Hamiltonian system with n+1 degrees of freedom. The integrable system is assumed to have n-dimensional hyperbolic invariant tori with coincident whiskers (separatric ... -
The scattering map in the planar restricted three body problem
Canalias Vila, Elisabet; Delshams Valdés, Amadeu; Masdemont Soler, Josep; Roldán González, Pablo (2005)
Article
Accés obertWe study homoclinic transport to Lyapunov orbits around a collinear libration point in the planar restricted three body problem. A method to compute homoclinic orbits is first described. Then we introduce the scattering ... -
The scattering map in the spatial Hill's problem
Delshams Valdés, Amadeu; Masdemont Soler, Josep; Roldán González, Pablo (2006-11)
Article
Accés obertWe present a framework and methodology to compute the scattering map associated to heteroclinic trajectories in the spatial Hill's problem. The scattering map can be applied to design of zero-cost transfer trajectories in ... -
Transversality of homoclinic orbits to hyberbolic equilibria in a Hamiltonian system, via the Hamilton-Jacobi equation
Delshams Valdés, Amadeu; Gutiérrez Serrés, Pere; Pacha Andújar, Juan Ramón (2011)
Report de recerca
Accés obertWe consider a Hamiltonian system with 2 degrees of freedom, with a hyperbolic equilibrium point having a loop or homoclinic orbit (or, alternatively, two hyperbolic equilibrium points connected by a heteroclinic orbit), ... -
Transversality of homoclinic orbits to hyperbolic equilibria in a Hamiltonian system, via the Hamilton-Jacobi equation
Delshams Valdés, Amadeu; Gutiérrez Serrés, Pere; Pacha Andújar, Juan Ramón (2012-07)
Report de recerca
Accés obertThe key point of our approach is to write the invariant manifolds in terms of generating functions, which are solutions of the Hamilton-Jacobi equation. In some examples, we show that it is enough to analyse the phase ... -
Transverse intersections between invariant manifolds of doubly hyperbolic invariant tori, via the Poincaré-Mel'nikov method
Delshams Valdés, Amadeu; Gutiérrez Serrés, Pere; Koltsova, Oksana; Pacha Andújar, Juan Ramón (2010-10)
Article
Accés restringit per política de l'editorialWe consider a perturbation of an integrable Hamiltonian system having an equilibrium point of elliptic-hyperbolic type, having a homoclinic orbit. More precisely, we consider an (n + 2)-degree-of-freedom near integrable ... -
Transverse intersections between invariant manifolds of doubly hyperbolic invariant tori, via the Poincaré-Mel'nikov method
Gutiérrez Serrés, Pere; Delshams Valdés, Amadeu; Pacha Andújar, Juan Ramón (2009-12)
Report de recerca
Accés obertWe consider a perturbation of an integrable Hamiltonian system having an equilibrium point of elliptic-hyperbolic type, having a homoclinic orbit. More precisely, we consider an (n+2)-degree-of-freedom near integrable ... -
Unbounded growth of energy in periodic perturbations of geodesic flows of the torus
Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Martínez-Seara Alonso, M. Teresa (1999)
Article
Accés obert