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http://dx.doi.org/10.7468/jksmeb.2011.18.4.353

THE AXIOM OF INDEFINITE SURFACES IN SEMI-RIEMANNIAN MANIFOLDS  

Lee, Jae-Won (Department of Mathematics, Sogang University)
Jin, Dae-Ho (Department of Mathematics, Dongguk University)
Publication Information
The Pure and Applied Mathematics / v.18, no.4, 2011 , pp. 353-359 More about this Journal
Abstract
In this paper, we characterize a semi-Riemannian manifolds satisfies the axiom of indefinite surfaces. We obtain the following result: If a semi-Riemannian manifold satisfies the axiom of indefinite surfaces, then it is a real space form.
Keywords
lightlike submanifolds; totally umbilical; indefinite ${\ell}$-surfaces;
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