Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Àlex Haro"'
Autor:
Alejandro Luque, Àlex Haro
Publikováno v:
Journal of Differential Equations
In this paper we present a-posteriori KAM results for existence of $d$-dimensional isotropic invariant tori for $n$-DOF Hamiltonian systems with additional $n-d$ independent first integrals in involution. We carry out a covariant formulation that doe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b45623e7f34eff1b443ab3764e09c993
https://doi.org/10.1016/j.jde.2018.08.003
https://doi.org/10.1016/j.jde.2018.08.003
This paper presents a methodology to study non-twist invariant circles and their bifurcations for area preserving maps, which is supported on the theoretical framework developed in Gonzalez-Enriquez et al. (Mem. Amer. Math. Soc. 227:vi+115, 2014). We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fe39634b951a6f7efa19f587c5c7f2d
http://hdl.handle.net/2445/190706
http://hdl.handle.net/2445/190706
The solution of the Grad–Shafranov (GS) equation, which is at the basis of Tokamak plasma MHD equilibrium computation, in the fixed boundary formulation first requires the description of the plasma boundary in terms of a few physical quantities. Li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d21d482a1bcfcd7a9c6c40b16313492
https://doi.org/10.33774/miir-2021-w3g2s
https://doi.org/10.33774/miir-2021-w3g2s
Autor:
Àlex Haro, Josep-Maria Mondelo
Publikováno v:
Dipòsit Digital de Documents de la UAB
Universitat Autònoma de Barcelona
Digital.CSIC. Repositorio Institucional del CSIC
instname
Universitat Autònoma de Barcelona
Digital.CSIC. Repositorio Institucional del CSIC
instname
The goal of this paper is to present a methodology for the computation of invariant tori in Hamiltonian systems combining flow map methods, parameterization methods, and symplectic geometry. While flow map methods reduce the dimension of the tori to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::190794bbc2b1ac67a29830a24f70cece
Autor:
Izza Zaidi, Ashly E. Jordan, Lauren Jessell, Leonardo Dominguez Gomez, Alex Harocopos, Michelle Nolan
Publikováno v:
COVID, Vol 3, Iss 10, Pp 1612-1621 (2023)
Housing conditions can increase health risks for people who use opioids (PWUO). Little research documents the influence of housing on PWUO’s ability to practice disease prevention methods. This study examines associations between housing status of
Externí odkaz:
https://doaj.org/article/1282b6f02e2249f8ad2c2da36f98cb7d
Autor:
Àlex Haro, Marta Canadell
Publikováno v:
Journal of Nonlinear Science. 27:1869-1904
The development of efficient methods for detecting quasiperiodic oscillations and computing the corresponding invariant tori is a subject of great importance in dynamical systems and their applications in science and engineering. In this paper, we pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff64beee51cd22171c5beb1b7ed25978
https://doi.org/10.1007/s00332-017-9389-y
https://doi.org/10.1007/s00332-017-9389-y
Autor:
Marta Canadell, Àlex Haro
Publikováno v:
Journal of Nonlinear Science. 27:1829-1868
We present several algorithms for computing normally hyperbolic invariant tori carrying quasi-periodic motion of a fixed frequency in families of dynamical systems. The algorithms are based on a KAM scheme presented in Canadell and Haro (J Nonlinear
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cee59d75dd635ee5318ca32016874004
https://doi.org/10.1007/s00332-017-9388-z
https://doi.org/10.1007/s00332-017-9388-z
A fundamental question in Dynamical Systems is to identify regions of phase/parameter space satisfying a given property (stability, linearization, etc). Given a family of analytic circle diffeomorphisms depending on a parameter, we obtain effective (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c23485dcccb8d64d91cd3d4e16f529be
http://hdl.handle.net/2445/192675
http://hdl.handle.net/2445/192675
Publikováno v:
Harm Reduction Journal, Vol 20, Iss 1, Pp 1-10 (2023)
Abstract Background Since the emergence of fentanyl in the drug market, syringe services programs (SSPs) have been at the forefront of providing life-saving tools such as naloxone and fentanyl test strips to people who use drugs (PWUD). It is still u
Externí odkaz:
https://doaj.org/article/6a754e456d1d495b9f798f2cf0f1e1bc
This monograph presents some theoretical and computational aspects of the parameterization method for invariant manifolds, focusing on the following contexts: invariant manifolds associated with fixed points, invariant tori in quasi-periodically forc