Results 11 to 20 of about 341 (179)

A New Approach on Helices in Pseudo-Riemannian Manifolds [PDF]

Abstract and Applied Analysis, 2014
A proper curve α in the n-dimensional pseudo-Riemannian manifold (M,g) is called a Vn-slant helix if the function g(Vn,X) is a nonzero constant along α, where X is a  parallel vector field along α and Vn is nth Frenet frame.
Evren Zıplar, Yusuf Yaylı, İsmail Gök   +2 more
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Closed conformal vector fields on pseudo-Riemannian manifolds [PDF]

International Journal of Mathematics and Mathematical Sciences, 2006
We give here a geometric proof of the existence of certain local coordinates on a pseudo-Riemannian manifold admitting a closed conformal vector field.
D. A. Catalano
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PSEUDO-RIEMANNIAN JACOBI–VIDEV MANIFOLDS [PDF]

International Journal of Geometric Methods in Modern Physics, 2007
We exhibit several families of Jacobi–Videv pseudo-Riemannian manifolds which are not Einstein. We also exhibit Jacobi–Videv algebraic curvature tensors where the Ricci operator defines an almost complex structure.
Gilkey, P., Nikčević, S.
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Curvature measures of pseudo-Riemannian manifolds

Journal für die reine und angewandte Mathematik (Crelles Journal), 2022
Abstract The Weyl principle is extended from the Riemannian to the pseudo-Riemannian setting, and subsequently to manifolds equipped with generic symmetric ( 0 ,
Bernig, Andreas, Faifman, Dmitry, Solanes, Gil   +2 more
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Pseudo-riemannian manifolds with commuting jacobi operators [PDF]

Rendiconti del Circolo Matematico di Palermo, 2006
We study the geometry of pseudo-Riemannian manifolds which are Jacobi--Tsankov, i.e. J(x)J(y)=J(y)J(x) for all tangent vectors x and y. We also study manifolds which are 2-step Jacobi nilpotent, i.e. J(x)J(y)=0 for all tangent vectors x and y.
Brozos-Vázquez, M., Gilkey, P.
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Conformality and Pseudo-Riemannian Manifolds.

MATHEMATICA SCANDINAVICA, 1971
Artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio A, Mathematica. Vol. 22/23/24 (1968/1969/1970), s. 113-123 ; streszcz. pol., ros. ; Artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio A, Mathematica. Vol. 22/23/24 (1968/1969/1970), s. 113-123 ; streszcz. pol., ros.
Ławrynowicz, Julian, Waliszewski, Włodzimierz (1934-2013)   +1 more
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On Pseudo-Petrov Symmetric Riemannian Manifolds

Advances in Mathematical Physics, 2016
The present paper deals with pseudo-Petrov symmetric Riemannian manifolds whose space-matter tensor satisfies a special condition. Firstly, basic results of pseudo-Petrov symmetric Riemannian manifolds are obtained.
Sanjib Kumar Jana, Fusun Nurcan, Amit Kumar Debnath, Joydeep Sengupta   +3 more
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Hyper generalized pseudo Q -symmetric semi-Riemannian manifolds

Cubo, 2021
The object of the present paper is to study the properties of a hyper generalized pseudo Q-symmetric semi-Riemannian manifold, proving that under certain assumptions, it is a perfect fluid spacetime.
Adara M. Blaga, Manoj Ray Bakshi, Kanak Kanti Baishya   +2 more
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Qualar curvatures of pseudo Riemannian manifolds and pseudo Riemannian submanifolds

AIMS Mathematics, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Geodesic Mappings of V_n(K)-Spaces and Concircular Vector Fields

Mathematics, 2019
In the present paper, we study geodesic mappings of special pseudo-Riemannian manifolds called V n ( K ) -spaces. We prove that the set of solutions of the system of equations of geodesic mappings on V n ( K ) -spaces forms a ...
Igor G. Shandra, Josef Mikeš
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