ON LIGHTLIKE HYPERSURFACES OF A GRW SPACE-TIME

Tae-Ho Kang
2012 Bulletin of the Korean Mathematical Society  
We provide a study of lightlike hypersurfaces of a generalized Robertson-Walker (GRW) space-time. In particular, we investigate lightlike hypersurfaces with curvature invariance, parallel second fundamental forms, totally umbilical second fundamental forms, null sectional curvatures and null Ricci curvatures, respectively.
doi:10.4134/bkms.2012.49.4.863 fatcat:fhm3j45mtvayrpoptz5tfjco24