### Enviaments recents

• #### On the length and area spectrum of analytic convex domains ﻿

(2016-01)
Article
Accés obert
Area-preserving twist maps have at least two different (p, q)-periodic orbits and every (p, q)-periodic orbit has its (p, q)-periodic action for suitable couples (p, q). We establish an exponentially small upper bound for ...
• #### On the asymptotic wavenumber of spiral waves in lambda - omega systems ﻿

(2016-01-01)
Article
Accés restringit per política de l'editorial
In this paper we consider spiral wave solutions of a general class of $\lambda -\omega$ systems with a small twist parameter q and we prove that the asymptotic wavenumber of the spirals is a ${{\mathcal{C}}^{\infty}}$ ...
• #### Arnold's mechanism of diffusion in the spatial circular restricted three-body problem: A semi-analytical argument ﻿

(2016-11-01)
Article
Accés restringit per política de l'editorial
We consider the spatial circular restricted three-body problem, on the motion of an infinitesimal body under the gravity of Sun and Earth. This can be described by a 3-degree of freedom Hamiltonian system. We fix an energy ...
• #### Warp evidence in precessing galactic bar models ﻿

(EDP Sciences, 2016-04-01)
Article
Accés obert
Most galaxies have a warped shape when they are seen edge-on. The reason for this curious form is not completely known so far, so in this work we apply dynamical system tools to contribute to its explanation. Starting from ...
• #### Quasi-periodically driven quantum systems ﻿

(Walter De Gruyter, 2016-10-10)
Article
Accés obert
Floquet theory provides rigorous foundations for the theory of periodically driven quantum systems. In the case of non-periodic driving, however, the situation is not so well understood. Here, we provide a critical review ...
• #### Full analysis of small hypercycles with shortcircuits in prebiotic evolution ﻿

(2017-01-05)
Article
Accés restringit per política de l'editorial
It is known that hypercycles are sensitive to the so-called parasites and short-circuits. While the impact of parasites has been widely investigated for well-mixed and spatial hypercycles, the effect of short-circuits in ...
• #### Exponentially small asymptotic formulas for the length spectrum in some billiard tables ﻿

(2016-04-05)
Article
Accés restringit per política de l'editorial
Let q = 3 be a period. There are at least two (1, q)-periodic trajectories inside any smooth strictly convex billiard table. We quantify the chaotic dynamics of axisymmetric billiard tables close to their boundaries by ...
• #### The social network around influenza vaccination in health care workers: A cross-sectional study ﻿

(2016-11-24)
Article
Accés obert
Background: Influenza vaccination coverage remains low among health care workers (HCWs) in many health facilities. This study describes the social network defined by HCWs’ conversations around an influenza vaccination ...
• #### Growth of Sobolev norms for the analytic NLS on T-2 ﻿

(2016-10-01)
Article
Accés obert
We consider the completely resonant non-linear Schrödinger equation on the two dimensional torus with any analytic gauge invariant nonlinearity. Fix s>1. We show the existence of solutions of this equation which achieve ...
• #### A Second Order Expansion of the Separatrix Map for Trigonometric Perturbations of a Priori Unstable Systems ﻿

(2016-11-01)
Article
Accés obert
In this paper we study a so-called separatrix map introduced by Zaslavskii–Filonenko (Sov Phys JETP 27:851–857, 1968) and studied by Treschev (Physica D 116(1–2):21–43, 1998; J Nonlinear Sci 12(1):27–58, 2002), Piftankin ...