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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.
(SABER ULA, 2008-07-02)
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, ...
Distribución geográfica y clave de las especies del genero Oritrophium (Kunth) Cuatrec (Asteraceae)
(Acta Botánica Venezuelica 31(1): 81-106, 2008-06)
Oritrophium es un género de Asteraceae originario de montañas tropicales y subtropicales entre Bolivia y México. Se suministra una lista actualizada de las especies del género (21) y una clave. Se incluyen ilustraciones ...