Results 41 to 50 of about 2,119 (92)

Matrix Lie groups as 3-dimensional almost contact B-metric manifolds [PDF]

, 2015
The object of investigation are Lie groups considered as almost contact B-metric manifolds of the lowest dimension three. It is established a correspondence of all basic-class-manifolds of the Ganchev-Mihova-Gribachev classification of the studied ...
Manev, Hristo
core   +1 more source

Twistor spinors on Lorentzian symmetric spaces [PDF]

arXiv, 1998
We solve the twistor equation on all indecomposable Lorentzian symmetric spaces explicity.
arxiv  

Four-dimensional Osserman metrics with nondiagonalizable Jacobi operators [PDF]

arXiv, 2005
A complete description of Osserman four-manifolds whose Jacobi operators have a nonzero double root of the minimal polynomial is given.
arxiv  

Semi-Riemannian submersions with totally umbilic fibres [PDF]

Rendiconti del Circolo Matematico di Palermo, Tomo LI (2002), 249-276, 2002
We get obstructions to existence of semi-Riemannian submersions with totally umbilic fibres.
arxiv   +1 more source

A Variational Approach for the Neumann Problem in Some FLRW Spacetimes

Advanced Nonlinear Studies, 2019
In this paper, we study, using critical point theory for strongly indefinite functionals, the Neumann problem associated to some prescribed mean curvature problems in a FLRW spacetime with one spatial dimension.
Bereanu Cristian, Torres Pedro J.
doaj   +1 more source

Lightlike foliations of semi-Riemannian manifolds [PDF]

arXiv, 2006
Using screen distributions and lightlike transversal vector bundles we develop a theory of degenerate foliations of semi-Riemannian manifolds.
arxiv  

Indefinite locally conformal Kaehler manifolds [PDF]

arXiv, 2006
We study the basic geometric properties of an indefinite locally conformal Kaehler manifold.
arxiv  

ParaSasakian manifolds with a constant paraholomorphic section curvature [PDF]

arXiv, 2008
In this paper paraSasakian manifolds with a constant paraholomorphic section curvature are considered.
arxiv  

Computation of Smarandache curves according to Darboux frame in Minkowski 3-space

Journal of the Egyptian Mathematical Society, 2017
In this paper, we study Smarandache curves according to Darboux frame in the three-dimensional Minkowski space E13. Using the usual transformation between Frenet and Darboux frames, we investigate some special Smarandache curves for a given timelike ...
H.S. Abdel-Aziz, M. Khalifa Saad
doaj  

Algebraic Ricci solitons of four-dimensional pseudo-Riemannian generalized symmetric spaces [PDF]

arXiv, 2011
We completely classify the algebraic Ricci solitons of four-dimensional pseudo-Riemannian generalized symmetric spaces.
arxiv