Exploració per autor "Llave Canosa, Rafael de la"
Ara es mostren els items 7-22 de 22
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Computation of limit cycles and their isochrons: Fast algorithms and their convergence
Huguet Casades, Gemma; Llave Canosa, Rafael de la (2013)
Article
Accés restringit per política de l'editorialWe present efficient algorithms to compute limit cycles and their isochrons (i.e., the sets of points with the same asymptotic phase) for planar vector fields. We formulate a functional equation for the parameterization ... -
Dynamical systems on lattices with decaying interaction I: A functional analysis framework
Fontich, Ernest; Llave Canosa, Rafael de la; Martín de la Torre, Pablo (2011-03-15)
Article
Accés restringit per política de l'editorialWe consider weakly coupled map lattices with a decaying interaction. That is, we consider systems which consist of a phase space at every site such that the dynamics at a site is little affected by the dynamics at far ... -
Dynamical systems on lattices with decaying interaction II: Hyperbolic sets and their invariant manifolds
Fontich, Ernest; Llave Canosa, Rafael de la; Martín de la Torre, Pablo (2011-03-15)
Article
Accés restringit per política de l'editorialThis is the second part of the work devoted to the study of maps with decay in lattices. Here we apply the general theory developed in Fontich et al. (2011) to the study of hyperbolic sets. In particular, we establish that ... -
Geometric properties of the scattering map of a normally hyperbolic invariant manifold
Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Seara, Tere M. (2006-10-10)
Article
Accés obertGiven a normally hyperbolic invariant manifold $\Lambda$ for a map $f$, whose stable and unstable invariant manifolds intersect transversally, we consider its associated scattering map. That is, the map that, given an ... -
Geometric properties of the scattering map of a normally hyperbolic invariant manifold
Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Seara, Tere M. (Elsevier, 2008)
Article
Accés obertGiven a normally hyperbolic invariant manifold Λ for a map f , whose stable and unstable invariant manifolds intersect transversally, we consider its associated scattering map. That is, the map that, given an asymptotic ... -
Instability of high dimensional Hamiltonian systems: Multiple resonances do not impede diffusion
Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Martínez-Seara Alonso, M. Teresa (2016-05-14)
Article
Accés obertWe consider models given by Hamiltonians of the form View the MathML sourceH(I,f,p,q,t;e)=h(I)+¿j=1n±(12pj2+Vj(qj))+eQ(I,f,p,q,t;e) Turn MathJax on where I¿I¿Rd,f¿TdI¿I¿Rd,f¿Td, p,q¿Rnp,q¿Rn, t¿T1t¿T1. These are higher ... -
KAM theory and a partial justification of Greene's criterion for non-twist maps
Delshams Valdés, Amadeu; Llave Canosa, Rafael de la (1999)
Article
Accés obertWe consider perturbations of integrable area preserving non twist maps of the annulus those are maps in which the twist condition changes sign These maps appear in a variety of applications notably transport in atmospheric ... -
KAM Theory without action--angle variables
González, Alejandra; Jorba, Angel; Llave Canosa, Rafael de la; Villanueva Castelltort, Jordi (2003)
Article
Accés obertGiven a torus approximately invariant under a symplectic map, we find sufficient conditions for the existence of a true invariant torus close to the given one. We do not assume either that we are working on action-angle ... -
A la recerca de l'estabilitat efectiva dels asteroids trojans : algunes idees constructives de tècniques KAM sense ssar coordenades acció-angle
Jorba, Angel; Llave Canosa, Rafael de la; Villanueva Castelltort, Jordi (2000)
Text en actes de congrés
Accés obertXerrada pel Seminari de Sistemes Dinamics UB-UPC. Barcelona, dimecres 19 de gener de 2000. Els trojans son una familia d'asteroids amb orbites situades no molt lluny del punt $L_5$ del sistema Sol-Jupiter. Si integrem ... -
Lindstedt series for lower dimensional tori
Jorba, Angel; Llave Canosa, Rafael de la; Zou, Maorong (1995)
Article
Accés obertWe consider the existence and effective computation of low-dimensional (less independent frequencies than degrees of freedom) invariant tori of a near-integrable system. Lindstedt method is a systematic procedure to compute ... -
Orbits of unbounded energy in quasi-periodic perturbations of geodesic flows
Delshams Valdés, Amadeu; Llave Canosa, Rafael de la; Martínez-Seara Alonso, M. Teresa (2003)
Article
Accés obertWe show that certain mechanical systems, including a geodesic °ow in any dimension plus a quasi-periodic perturbation by a potential, have orbits of unbounded energy. The assumptions we make in the case of geodesic °ows ... -
Teoria Kam Sin Coordenadas Accion-Angulo
González, Alejandra; Jorba, Angel; Llave Canosa, Rafael de la; Villanueva Castelltort, Jordi (2001)
Article
Accés obertThe classical KAM methods, strongly supported on the use of canonical trans- formations in the action-angle context, are not effcient to be applied to a wide range of systems in which the Hamiltonian is known (for instance) ... -
The parameterization method for invariant manifolds I: manifolds associated to non-resonant subspaces
Cabré Vilagut, Xavier; Fontich i Julià, Ernest; Llave Canosa, Rafael de la (2002)
Article
Accés obertWe introduce a method to prove existence of invariant manifolds and, at the same time to find simple polynomial maps which are conjugated to the dynamics on them. As a first application, we consider the dynamical system ... -
The parameterization method for invariant manifolds II: regularity with respect to parameters
Cabré Vilagut, Xavier; Fontich i Julià, Ernest; Llave Canosa, Rafael de la (2002)
Article
Accés obertWe study the regularity with respect to parameters of the invariant manifolds associated to non-resonant subspaces obtained in the previous article [CFdlL00]. -
The parameterization method for invariant manifolds III: overview and applications
Cabré Vilagut, Xavier; Fontich i Julià, Ernest; Llave Canosa, Rafael de la (2003)
Article
Accés obertWe describe a method to establish existence and regularity of invariant manifolds and, at the same time to find simple maps which are conjugated to the dynamics on them. The method establishes several invariant manifold ... -
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