Navegação Ciências Exatas e da Terra por Autor "Lopes, Artur Oscar"
Resultados 1-20 de 23
-
Absolutely continuous invariant mesures for a class of affine interval exchange maps
Coelho, Zaqueu; Lopes, Artur Oscar; Rocha, Luiz Fernando Carvalho da (1995) [Artigo de periódico]We consider a class A of affine interval exchange maps of the interval and we analyse several ergodic properties of the elements of this class, among them the existence of absolutely continuous invariant probability measures. ... -
C*-algebras, approximately proper equivalence relations and thermodynamic formalism
Exel, Ruy; Lopes, Artur Oscar (2004) [Artigo de periódico]We introduce a non-commutative generalization of the notion of (approximately proper) equivalence relations and propose the construction of a ‘quotient space’. We then consider certain one-parameter groups of automorphisms ... -
Explicit bivariate rate functions for large deviations in AR(1) and MA(1) processes with Gaussian innovations
Karling, Maicon Josué; Lopes, Artur Oscar; Lopes, Silvia Regina Costa (2023) [Artigo de periódico]We investigate the large deviations properties for centered stationary AR(1) and MA(1) processes with independent Gaussian innovations, by giving the explicit bivariate rate functions for the sequence of two-dimensional ... -
Invariant measures for gauss maps associated with interval exchange maps
Lopes, Artur Oscar; Rocha, Luiz Fernando Carvalho da (1994) [Artigo de periódico]An explidt formula for an ergodic cr-finite measure inva.ria.nt by the Gauss map associated to a new induction on the interval exchange maps is given. The techniques devcloped allow another proof of Keane's conjecture which ... -
A level-1 large deviation principle for the autocovariances of uniquely ergodic transformations with additive noise
Carmona, Sara Ianda Correa; Landim, Claudio; Lopes, Artur Oscar; Lopes, Silvia Regina Costa (1997) [Artigo de periódico] -
Lyapunov minimizing measures for expanding maps of the circle
Contreras, Gonzalo; Lopes, Artur Oscar; Thieullen, Ph. (2001) [Artigo de periódico]We consider the set of maps f є Fα+=Uβ >αC1β of the circle which are covering maps of degree D, expanding, minxєS1 f ¹(x) > 1 and orientation preserving. We are interested in characterizing the set of suchmaps f which admit ... -
Maximum likelihood and mininum entropy identification of grammars
Collet, Pierre; Galves, Antonio; Lopes, Artur Oscar (1994) [Artigo de periódico] -
On the Aubry-Mather theory for symbolic dynamics
Garibaldi, Eduardo; Lopes, Artur Oscar (2008) [Artigo de periódico]We propose a new model of ergodic optimization for expanding dynamical systems: the holonomic setting. In fact, we introduce an extension of the standard model used in this theory. The formulation we consider here is quite ... -
On the spectral density of a class of chaotic time series
Lopes, Artur Oscar; Souza, Rafael Rigão; Lopes, Silvia Regina Costa (1995) [Artigo de periódico] -
Open billiards : cantor sets, invariant and conditionally invariant probabilities
Lopes, Artur Oscar; Markarian Abrahamian, Roberto (1994) [Artigo de periódico]A b stract - Billiards are the simplest models fur nudcrstanding statistical properties of thc dynamics of a gas in a closed compartment. vVc analyze the dynamics of a class of billiards (the open billiard on the plane) ... -
Open billiards : invariant and conditionally invariant probabilities on cantor sets
Lopes, Artur Oscar; Markarian Abrahamian, Roberto (1996) [Artigo de periódico]Billiards are the simplest models for understanding the statistical theory of the dynamics o f a gas in a closed compartment. We analyze the dynamics of a class o f billiards ( the open billiard on the plane) in terms of ... -
Orthogonality and the hausdorff dimension of the maximal measure
Lopes, Artur Oscar (1986) [Artigo de periódico]In this paper the orthogonality properties of iterated polynomials are shown to remain valid in some cases for rational maps. Using a functional equation fulfilled by the generating function, the author shows that the ... -
Parameter estimation in Manneville–Pomeau processes
Pasini, Bárbara Patricia Olbermann; Lopes, Silvia Regina Costa; Lopes, Artur Oscar (2023) [Artigo de periódico]In this paper, we study a class of stochastic processes [...], where[...] is obtained from the iterations of the transformation , invariant for an ergodic probability[...] on [...] and a certain constant by partial function ... -
Parametric estimation and spectral analysis of chaotic time series
Lopes, Artur Oscar; Lopes, Silvia Regina Costa (1995) [Artigo de periódico] -
Selection of calibrated subaction when temperature goes to zero in the discounted problem
Iturriaga, Renato; Lopes, Artur Oscar; Mengue, Jairo Krás (2018) [Artigo de periódico] -
Spectral analysis of chaotic transformations
Lopes, Artur Oscar; Lopes, Silvia Regina Costa; Souza, Rafael Rigão (1996) [Artigo de periódico] -
Spectral analysis of expanding one-dimensional chaotic transformations
Lopes, Artur Oscar; Souza, Rafael Rigão; Lopes, Silvia Regina Costa (1996) [Artigo de periódico] -
Statistics of visits to zero angle corners of billiards
Lopes, Artur Oscar; Markarian Abrahamian, Roberto (2000) [Artigo de periódico]Consider a Sinai billiard table Q (bounded region of the plane, with a finite number of dispersing boundaries âQ;) such that two circular pieces of the boundary are tangent at C . Consider the dynarnical systE'm T describing ... -
Structural stability and hyperbolic attractors
Lopes, Artur Oscar (1979) [Artigo de periódico]A necessary condition for structural stability is presented that in the two dimensional case means that the system has a finite number of topological attractors -
Sub-actions for Anosov flows
Lopes, Artur Oscar; Thieullen, Ph. (2005) [Artigo de periódico]Let (M, {Øt }) be a smooth (not necessarily transitive) Anosov flow without fixed points generated by a vector field X(x) = (d/dt)|t=0Øt (x) on a compact manifold M. Let A : M → R be a globally Holder function defined on ...