Resumen

ROSALES-ORTEGA, José. The signature in actions of semisimple Lie groups on pseudo-Riemannian manifolds. Proyecciones (Antofagasta) [online]. 2012, vol.31, n.1, pp. 51-63. ISSN 0716-0917.  doi: 10.4067/S0716-09172012000100006.

We study the relationship between the signature of a semisimple Lie group and a pseudoRiemannian manifold on wich the group acts topologically transitively and isometrically. We also provide a description of the bi-invariant pseudo-Riemannian metrics on a semisimple Lie Group over R in terms of the complexification of the Lie algebra associated to the group, and then we utilize it to prove a remark of Gromov.

Palabras clave : semisimple Lie groups; bi-invariant metric; local freeness  .