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Volume :38 Issue : 2 2011
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Translation and homothetical lightlike hypersurfaces of a semi-Euclidean space
Auther : WENDY GOEMANS AND IGNACE VAN DE WOESTYNE
Hogeschool-Universiteit Brussel, Stormstraat 2, 1000 Brussels, Belgium
e-mail: wendy.goemans@hubrussel.be and ignace.vandewoestyne@hubrussel.be
ABSTRACT
It is shown that every translation lightlike and every homothetical lightlike hypersurface in a semi-Euclidean space is locally a hyperplane. As a consequence, both translation and homothetical lightlike hypersurfaces are minimal.
Keywords: homothetical lightlike hypersurface; lightlike hypersurface; translation lightlike hypersurface