Exploració per tema "Dynamical systems"
Ara es mostren els items 37-56 de 82
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Integrable systems on singular symplectic manifolds: from local to global
(2021-02-03)
Report de recerca
Accés obertIn this article, we consider integrable systems on manifolds endowed with symplectic structures with singularities of order one. These structures are symplectic away from a hypersurface where the symplectic volume goes ... -
Kolmogorov Theorem Revisited
(2004)
Report de recerca
Accés obertKolmogorov Theorem on the persistence of invariant tori of real analytic Hamiltonian systems is revisited. In this paper we are mainly concerned with the lower bound on the constant of the Diophantine condition required ... -
A la recerca de l'estabilitat efectiva dels asteroids trojans : algunes idees constructives de tècniques KAM sense ssar coordenades acció-angle
(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
(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 ... -
Modeling tails and bridges in galaxy interactions with the restricted three body problem
(Universitat Politècnica de Catalunya, 2021-01)
Projecte Final de Màster Oficial
Accés obertGalaxy interaction is a common feature in our universe but the dynamics behind it is still not fully understood. More data is becoming available lately and every time it is more precise. However, we need mathematical and ... -
Modelling and analysis of crayfish competition
(Universitat Politècnica de Catalunya, 2015-09)
Treball Final de Grau
Accés restringit per acord de confidencialitat
Realitzat a/amb: Technische Universität München. Fakultät für Mathematik -
Modelos dinámicos en finanzas
(2014-01-17)
Altres
Accés obertEl problema de la modelización dinámica en finanzas tiene mucho que ver con el tipo de problema que se pretende estudiar. Es preciso tener en cuenta el subyacente así como las magnitudes que se pretende estimar para ... -
Nonlinear dynamics of replication modes in tunable deleterious fitness landscape
(Universitat Politècnica de Catalunya, 2017-07)
Treball Final de Grau
Accés restringit per decisió de l'autor
Realitzat a/amb: Centre de Recerca MatemàticaWe analyze a system of nonlinear ordinary differential equations describing the intracellular amplification dynamics of viral RNA genomes. The replication modes considered range between two extremes given by the so-called ... -
Nonlinear oscillatory mixing in the generalized Landau scenario
(American Institute of Physics (AIP), 2018-05-31)
Article
Accés obertWe present a set of phase-space portraits illustrating the extraordinary oscillatory possibilities of the dynamical systems through the so-called generalized Landau scenario. In its simplest form the scenario develops in ... -
Numerical exploration of bifurcation phenomena associated with complex instability
(1997)
Article
Accés obertThe Hopf-like bifurcation associated with the transition from stability to complex instability of a family of periodic orbits in a Hamiltonian system with three (or more) degrees of freedom is investigated. Numerical ... -
Numerically solving Hilbert's 16th problem
(Universitat Politècnica de Catalunya, 2021-01)
Treball Final de Grau
Accés obertThe second part of Hilbert's 16th problem remains unresolved more than a century after he first formulated it. This Degree Final Project (TFG) is an attempt to bring the power of modern computers into the equation. In the ... -
On a conjecture of Fujita
(2000)
Article
Accés obert -
On the Hamiltonian Andronov-Hopf bifurcation
(2001)
Article
Accés obert -
On the minimal models for graph maps
(2000)
Article
Accés obert -
On the numerical computation of Diophantine rotation numbers of analytic circle maps
(2004)
Article
Accés obertIn this paper we present a numerical method to compute Diophantine rotation numbers of circle maps with high accuracy. We mainly focus on analytic circle diffeomorphisms, but the method also works in the case of (enough) ... -
On the singular Weinstein conjecture and the existence of escape orbits for b-Beltrami fields
(2021-10-07)
Report de recerca
Accés obertMotivated by Poincare’s orbits going to infinity in the (restricted) three-body problem ´ (see [29] and [7]), we investigate the generic existence of heteroclinic-like orbits in a neighbourhood of the critical set of a ... -
On the topological dynamics and phase-locking renormalization of Lorenz-Like maps
(2000)
Article
Accés obertThe aim of this paper is twofold. First we give a characterization of the set of kneading invariants for the class of Lorenz--like maps considered as a map of the circle of degree one with one discontinuity. In a second ... -
Optimal dispersal and diffusion-enhanced robustness in two-patch metapopulations: origin’s saddle-source nature matters
(Springer, 2024-02-21)
Article
Accés obertA two-patch logistic metapopulation model is investigated both analytically and numerically focusing on the impact of dispersal on population dynamics. First, the dependence of the global dynamics on the stability type of ... -
Oscillatory dynamics with applications to cognitive tasks
(Universitat Politècnica de Catalunya, 2022-10)
Projecte Final de Màster Oficial
Accés obertOscillations are ubiquitous in the brain and robustly correlate with distinct cognitive tasks. A specific type of oscillatory signals allows robust switching between states in networks involved in memorizing tasks. In ... -
Parallel computation of normal forms
(2004)
Article
Accés obertThe time to compute normal forms numerically grows very fast with respect to the degree of the normal form and the dimension of the system. We design and implement a parallel algorithm based on the parallel computation ...
