DSpace Collection:http://hdl.handle.net/10071/55542020-01-28T11:50:30Z2020-01-28T11:50:30ZDilatonic black holes in superstring gravityMoura, F.http://hdl.handle.net/10071/179412019-05-02T02:52:14Z2019-01-01T00:00:00ZTitle: Dilatonic black holes in superstring gravity
Authors: Moura, F.
Abstract: We solve the dilaton field equation in the background of a spherically symmetric black hole in type II superstring theory with ?'3 corrections in arbitrary d spacetime dimensions. We then apply this result to obtain a spherically symmetric black hole solution with ?'3 corrections, in superstring theory compactified on a torus, coupled to such dilaton. For this black hole we obtain its mass, entropy, temperature, specific heat, and free energy.2019-01-01T00:00:00ZOn uniqueness of stationary vacuum black holesChrusciel, P. T.Costa, J. L.http://hdl.handle.net/10071/149752018-01-22T02:28:35Z2008-01-01T00:00:00ZTitle: On uniqueness of stationary vacuum black holes
Authors: Chrusciel, P. T.; Costa, J. L.
Abstract: We prove uniqueness of the Kerr black holes within the connected, non-degenerate, analytic class of regular vacuum black holes.
Description: WOS:000272458700010 (Nº de Acesso Web of Science)2008-01-01T00:00:00ZDeterminism versus predictability in the context of Poincare's work on the restricted 3-body problemLaureano, M.http://hdl.handle.net/10071/139792017-07-13T01:14:14Z2012-01-01T00:00:00ZTitle: Determinism versus predictability in the context of Poincare's work on the restricted 3-body problem
Authors: Laureano, M.
Abstract: It is exposed the Poincare’s work (1880's) in the system defining the restricted 3-body problem which led to the discovery of a special kind of behavior – the dynamical instability. Contrary to the widespread belief that the Deterministic Chaos Theory began with the computational work of Lorenz (1960's), the Poincare's theoretical research was sufficiently clear about the existence of chaotic deterministic behavior. Until the time of Poincare, there was a tacit assumption that the uncertainty in the output does not arise from any randomness in the dynamical laws, since they are completely deterministic, but rather from the lack of the infinite accuracy in the initial conditions. In this paper it is emphasized that the issues of determinism and predictability are distinct.2012-01-01T00:00:00ZCohomology of discrete dynamical systemsLaureano, M.http://hdl.handle.net/10071/139782017-07-13T01:14:11Z2013-01-01T00:00:00ZTitle: Cohomology of discrete dynamical systems
Authors: Laureano, M.
Abstract: This article presents a detailed treatment of Livschitz theorem for hyperbolic diffeomorphisms. Based on the periodic data, this theorem provides a necessary and sufficient condition so that cohomological equations have sufficiently regular solutions. It is one of the main tools to obtain global data of cohomological nature from the periodic data. Since it is crucial in the statement of Livschitz theorem, it is also presented the Anosov closing lemma.2013-01-01T00:00:00Z