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Volume :7 Issue : 1 1980
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G-Structures on manifolds with parallel foliations
Auther : HANI FARRAN
Department of Mathematics, University of Kuwait
ABSTRACT
In this paper we find the G-structure of a pseudo-riemannian manifold (M,g) admitting a parallel partially null foliation F. Then we prove that this structure is in fact a reduction of the O-structure given by the metric, where O is the orthogonal group. As an example we give a complete description of the groups involved in the case of a Lorentz manifold with a parallel null 1-foliation.