Conformality and Pseudo-Riemannian Manifolds.
J. Lawrynowicz, W. Waliszewski (1971)
Mathematica Scandinavica
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J. Lawrynowicz, W. Waliszewski (1971)
Mathematica Scandinavica
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Leo Sario, John Chang (1971)
Mathematica Scandinavica
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Mitsuru Nakai, Leo Sario (1967)
Mathematica Scandinavica
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Neculai Papaghiuc (2001)
Colloquium Mathematicae
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We consider a certain pseudo-Riemannian metric G on the tangent bundle TM of a Riemannian manifold (M,g) and obtain necessary and sufficient conditions for the pseudo-Riemannian manifold (TM,G) to be Ricci flat (see Theorem 2).
Keli Zheng, Liangyun Chen, Yongzheng Zhang (2014)
Colloquium Mathematicae
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This paper is primarily concerned with pseudo-Riemannian superalgebras, which are superalgebras endowed with pseudo-Riemannian non-degenerate supersymmetric consistent bilinear forms. Decompositions of pseudo-Riemannian superalgebras whose left centers are isotropic and whose left centers are not isotropic are investigated.
Bayram Ṣahin (2011)
Annales Polonici Mathematici
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We give necessary and sufficient conditions for Riemannian maps to be biharmonic. We also define pseudo-umbilical Riemannian maps as a generalization of pseudo-umbilical submanifolds and show that such Riemannian maps put some restrictions on the target manifolds.
Novica Blažić, Neda Bokan, Zoran Rakić (1997)
Publications de l'Institut Mathématique
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Anders Melin (1972)
Mathematica Scandinavica
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Henrik Stetkaer (1971)
Mathematica Scandinavica
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Gadea, P. M., Oubiña, J. A. (2003)
International Journal of Mathematics and Mathematical Sciences
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Mileva Prvanović (1993)
Matematički Vesnik
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Blažić, Novica, Bokan, Neda, Gilkey, Peter, Rakić, Zoran (1997)
Balkan Journal of Geometry and its Applications (BJGA)
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L.R. Taylor, C.B. Hughes (1993)
Mathematica Scandinavica
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Veikko T. Purmonen (1989)
Mathematica Scandinavica
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