Geodesic
Conformal Actions on Homogeneous Lorentzian Manifolds
Journal of Lie theory, Tome 20 (2010) no. 3, pp. 469-481.

Voir la notice de l'article provenant de la source Heldermann Verlag

A conformal group action on a pseudo-Riemannian manifold is essential if the action is not an isometric action with respect to a conformally equivalent metric. We classify all essential actions of simple Lie groups on Riemannian, Lorentzian and sub-Lorentzian manifolds.
Classification : 57S20, 53C15
Mots-clés : Lorentzian manifolds, Conformal transformations 
@article{JLT_2010_20_3_JLT_2010_20_3_a2,
     author = {U. Bader },
     title = {Conformal {Actions} on {Homogeneous} {Lorentzian} {Manifolds}},
     journal = {Journal of Lie theory},
     pages = {469--481},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/JLT_2010_20_3_JLT_2010_20_3_a2/}
}
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U. Bader . Conformal Actions on Homogeneous Lorentzian Manifolds. Journal of Lie theory, Tome 20 (2010) no. 3, pp. 469-481. http://geodesic.mathdoc.fr/item/JLT_2010_20_3_JLT_2010_20_3_a2/