Centro de Física Fundamental (CFF): Envíos recientes
Now showing items 21-40 of 144
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On the geometry of warped spacetimes
(SABER ULA, 2008-07-02)On the geometry of warped spacetimes (Carot, Jaume; da Costa, J.) Abstract An invariant characterization of warped spacetimes is given and a classification scheme for them is proposed. Some results on the curvature ... -
Energy-momentum types of warped spacetimes
(SABER ULA, 2008-07-02)Energy-momentum types of warped spacetimes (Carot, Jaume; Haddow, Barry M. Abstract The possible energy–momentum types of warped product pacetime are investigated using the classification given by Carot and da Costa. -
Some developments on axial symmetry
(SABER ULA, 2008-07-02)Some developments on axial symmetry (Carot, Jaume) Abstract The definition of axial symmetry in general relativity is reviewed, and some results concerning the geometry in a neighbourhood of the axis are derived. ... -
Conformal symmetry inheritance in null fluid spacetimes
(SABER ULA, 2008-07-02)Conformal symmetry inheritance in null fluid spacetimes (Carot, Jaume; Keane, A. J.; Coley, A. A.; Hall, J. S.; Tupper, Brian O. J.) Abstract We define inheriting conformal Killing vectors for null fluid spacetimes ... -
Conformal symmetries in null Einstein-Maxwell fields
(SABER ULA, 2008-07-02)Conformal symmetries in null Einstein-Maxwell fields (Carot, Jaume; Hall, J. S.) Abstract It is shown that if a null Einstein-Maxwell spacetime admifs a proper conformal vector field it must either be a (generalized ... -
Conformally reducible 2 + 2 spacetimes
(SABER ULA, 2008-07-02)Conformally reducible 2 + 2 spacetimes (Carot, Jaume; Tupper, Brian O. J.) Abstract Spacetimes which are conformal to 2 + 2 reducible spacetimes are considered. We classify them according to their conformal algebra, ... -
Homothetic perfect fluid spacetimes
(SABER ULA, 2008-07-02)Homothetic perfect fluid spacetimes (Carot, Jaume; Sintes, A. M.) Abstract A brief summary of results on homotheties in general relativity is given, including general information about spacetimes admitting an ... -
Matter collineations: The inverse "symmetry inheritance" problem.
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Generalised soliton solutions of the Weyl class
(SABER ULA, 2008-07-02)Generalised soliton solutions of the Weyl class (Verdaguer, Enric ; Carot, Jaume) Abstract The whole family of generalised soliton solutions of the Weyl class for Einstein's equations in vacuum is considered. A ... -
On the definition of cylindrical symmetry
(SABER ULA, 2008-07-02)On the definition of cylindrical symmetry (Carot, Jaume; Senovilla, José M. M.; Vera, Raül) Abstract The standard definition of cylindrical symmetry in general relativity is reviewed. Taking the view that axial ... -
Self-similar static solutions admitting a 2-space of constant curvature
(SABER ULA, 2008-07-02)Self-similar static solutions admitting a 2-space of constant curvature (Carot, Jaume; Sintes, A. M.) Abstract A recent result by Haggag and Hajj-Boutros is reviewed within the framework of self-similar spacetimes, ... -
Clusters de PCs.
(SABER ULA, 2008-06-09)Clusters de PCs. (Núñez, Luis; Díaz, Gilberto; Hoeger, Herbert.) Resumen Los Clusters de PCs se hicieron populares con el proyecto Beowulf. La idea consiste en armar un máquina, con gran poder de computo, interconectando ... -
E-science initiatives in Venezuela.
(SABER ULA, 2008-06-09)E-science initiatives in Venezuela. (Chaves, Juan Luis; Díaz, Gilberto; Hamar, Vanessa; Isea, Raúl; Rojas, Freddy; Ruiz, Nicolás; Torréns Heeren, Rodrigo J.; Uzcátegui, M.; Flórez López, Julio; Hoeger, Herbert; Mendoza, ... -
Formulación de Einsenhart de la mecánica clásica
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Fracturas en distribuciones autogravitantes cargadas
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E-investigación: una nueva manera de producir conocimiento.
(SABER ULA, 2007-07-03)E-investigación: una nueva manera de producir conocimiento. (Núñez, Luis) Resumen Se describen algunas experiencias en e-investigación de en Física de Altas Energías, Astrofísica y Química. Luego se hace una descripción ... -
Sound speeds, cracking and stability of self-gravitating anisotropic compact objects.
(SABER ULA, 2007-06-25)Sound speeds, cracking and stability of self-gravitating anisotropic compact objects. Abstract Using the the concept of cracking we explore the influence of density fluctuations and local anisotropy have on the stability ... -
Crucial test of relativity theory: open currents and magnetic model of light.
(SABER ULA, 2007-04-13)Crucial test of relativity theory: open currents and magnetic model of light. Spavieri, Gianfranco; Erazo, J.; Sanchez, A.; Ayazo, José and Rodriguez, M. Abstract Fundamental tests of special theory of relativity (STR) ... -
Locality and electromagnetic momentum in critical tests of special relativity.
(SABER ULA, 2007-04-13)Locality and electromagnetic momentum in critical tests of special relativity. Spavieri, Gianfranco; Quintero, Jesús; Sánchez, Arturo; Ayazo, José y Gillies, George Abstract In this review of recent tests of special ... -
New BPS domain wall solutions.
(SABER ULA, 2007-03-28)New BPS domain wall solutions. (Pantoja, Nelson y Ramírez, Alba) Abstract Smooth solutions of gravity-scalar field models which represents BPS domain wall spacetimes with a well defined thin wall limit are obtained ...