Mathematics – Dynamical Systems
Scientific paper
2004-12-09
Mathematics
Dynamical Systems
Scientific paper
We show a geometric rigidity of isometric actions of non compact (semisimple)
Lie groups on Lorentz manifolds. Namely, we show that the manifold has a warped
product structure of a Lorentz manifold with constant curvature by a Riemannian
manifold.
Arouche Abdelouahab
Deffaf Mohamed
Zeghib Abdelghani
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