Abstract
This paper provides new results on a class of totally umbilical lightlike submanifolds in semi-Riemannian manifolds of constant curvature. We prove that the induced Ricci tensor of any such submanifold is symmetric if and only if its screen distribution is integrable.
Citation
K. L. Duggal. D. H. Jin. "Totally umbilical lightlike submanifolds." Kodai Math. J. 26 (1) 49 - 68, March 2003. https://doi.org/10.2996/kmj/1050496648
Information