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New geometries for the characterization of dark matter phenomena
(2014)
We present some new geometries with spheroidal symmetry, with and without mass, that involve new kind of energy momentum tensors, and which are suitable for the description of dark matter phenomena.
Relatividad general y la geometría de ecuaciones diferenciales
(2006-03)
En esta tesis, se muestran y desarrollan estructuras geométricas subyacentes en cierta clase de ecuaciones diferenciales que estan íntimamente relacionadas a aquellas que dan origen a la formulación de superficies nulas ...
Intrinsic angular momentum for radiating spacetimes which agrees with the Komar integral in the axisymmetric case
(2014)
Here, we present a new definition of intrinsic angular momentum at future null infinity, based on the charge-integral approach. This definition is suitable for the general case of radiating spacetimes without symmetries, ...