Browsing Articulos, Pre-prints (Centro de Física Fundamental (CFF)) by Author "Carot, Jaume"

Now showing items 1-18 of 18

    • Comment on Ricci Collineations of static spherically symmetric spacetimes 

      Núñez, Luis; Percoco, Umberto; Contreras, Gerardo; Bertolotti, Ricardo; Carot, Jaume (SABER ULA, 2006-01-26)
      Comment on Ricci Collineations of static spherically symmetric spacetimes (Núñez, Luis; Contreras, Gerardo; Percoco, Umberto; Bertolotti, Ricardo; Carot, J.) Abstract We present a counter example to a theorem given ...

    • Conformal symmetries in null Einstein-Maxwell fields 

      Carot, Jaume; Hall, J. S. (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 ...

    • Conformal symmetries in warped manifolds. 

      Apostolopoulos, Pantelis S.; Carot, Jaume (SABER ULA, 2008-07-02)
      Conformal symmetries in warped manifolds (P. S., Apostolopoulos; Carot, Jaume.) Abstract The existence of a Conformal Vector Field (CVF) is studied in the important class of warped manifolds of arbitrary dimension ...

    • Conformal symmetry inheritance in null fluid spacetimes 

      Carot, Jaume; Tupper, Brian O. J.; Hall, J. S.; Keane, A. J.; Coley, A. A. (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 ...

    • Conformally reducible 2 + 2 spacetimes 

      Carot, Jaume; Tupper, Brian O. J. (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, ...

    • Energy-momentum types of warped spacetimes 

      Carot, Jaume; Haddow, Barry M. (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.

    • Generalised soliton solutions of the Weyl class 

      Verdaguer, Enric; Carot, Jaume (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 ...

    • Homothetic perfect fluid spacetimes 

      Carot, Jaume; Sintes, A. M. (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 ...

    • Hydrodynamics in class b warped spacetimes. 

      Núñez, Luis; Carot, Jaume (SABER ULA, 2006-01-26)
      Hydrodynamics in class b warped spacetimes. (Núñez, Luis; Carot, Jeumes.) Abstract We discuss certain general features of type B warped spacetimes which have important consequences on the material content they may ...

    • Lie Groups of Conformal Motions acting on Null Orbits 

      Carot, Jaume; Coley, A. A.; Sintes, A. M. (SABER ULA, 2008-07-02)
      Lie Groups of Conformal Motions acting on Null Orbits (Carot, Jaume; Coley, A. A.; Sintes, A. M.) Abstract Space-times admitting a 3-dimensional Lie group of conformal motions acting on null orbits containing a ...

    • Matter collineations: The inverse "symmetry inheritance" problem. 

      Carot, Jaume; da Costa, J.; Vaz, E. G. L. R. (SABER ULA, 2008-07-02)

    • On the definition of cylindrical symmetry 

      Carot, Jaume; Senovilla, José M. M.; Vera, Raül (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 ...

    • On the geometry of warped spacetimes 

      Carot, Jaume; da Costa, J. (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 ...

    • Ricci collineations for type B warped space-times 

      Núñez, Luis; Percoco, Umberto; Carot, Jaume (SABER ULA, 2006-01-26)
      Ricci collineations for type B warped space-times (Núñez, Luis; Percoco, Umberto; Carot, J.) Abstract We present the general structure of proper Ricci Collineations (RC) for type B warped space-times. Within this ...

    • Scalar field cosmologies: a dynamical systems study 

      Carot, Jaume; Collinge, Magdalena M. (SABER ULA, 2008-07-02)
      Scalar field cosmologies: a dynamical systems study (Carot, Jaume; Collinge, Magdalena M.) Abstract Inhomogeneous G2 solutions whose material content can be modelled by a scalar field are considered with a view towards ...

    • Scalar field spacetimes 

      Carot, Jaume; Collinge, Magdalena M. (SABER ULA, 2008-07-02)
      Scalar field spacetimes (Carot, Jaume; Collinge, Magdalena M.) Abstract Scalar field spacetimes are considered with a view towards their applications in cosmology. Some results existing in the literature are reviewed ...

    • Self-similar static solutions admitting a 2-space of constant curvature 

      Carot, Jaume; Sintes, A. M. (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, ...

    • Some developments on axial symmetry 

      Carot, Jaume (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. ...