In this paper, we introduce the idea of a lightlike submersion from a semi-Riemannian manifold onto a lightlike manifold, and give some examples. Then we define O’Neill’s tensors for such submersions and investigate their main properties. We show that the Schouten connection is not a metric connection in a lightlike submersion. We also investigate curvature properties of the manifolds and establish a relation between the null sectional curvatures of a semi-Riemannian manifold and a lightlike manifold.
Primary Language | English |
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Subjects | Statistics |
Journal Section | Mathematics |
Authors | |
Publication Date | January 1, 2010 |
Published in Issue | Year 2010 Volume: 39 Issue: 1 |