Results 121 to 130 of about 427,064 (305)

Characterizing Affine Vector Fields on Pseudo-Riemannian Manifolds

Axioms
We study the characteristics of affine vector fields on pseudo-Riemannian manifolds and provide tensorial formulas that characterize these vector fields.
Norah Alshehri, Mohammed Guediri
doaj   +1 more source

Riemannian $s$-manifolds [PDF]

Journal of Differential Geometry, 1977
Tsagas, Gr., Ledger, A.
openaire   +2 more sources

A Sufficient Condition that a Mapping of Riemannian Manifolds be a Fibre Bundle [PDF]

, 1960
Róbert Hermann
openalex   +2 more sources

Two theorems on (ϵ)-Sasakian manifolds

International Journal of Mathematics and Mathematical Sciences, 1998
In this paper, We prove that every (ϵ)-sasakian manifold is a hypersurface of an indefinite kaehlerian manifold, and give a necessary and sufficient condition for a Riemannian manifold to be an (ϵ)-sasakian manifold.
Xu Xufeng, Chao Xiaoli
doaj   +1 more source

On generalized recurrent Riemannian manifolds

Acta Mathematica Hungarica, 2008
The object of the present paper is to study a type of Riemannian manifolds called generalized recurrent manifolds. We have constructed two concrete examples of such a manifold whose scalar curvature is non-zero non-constant. Some other properties have been considered.
Arslan, K., De, U. C., Murathan, C., Yildiz, A.   +3 more
openaire   +5 more sources

Adaptive filter with Riemannian manifold constraint. [PDF]

Sci Rep, 2023
Mejia J, Mederos B, Gordillo N, Ortega L.   +3 more
europepmc   +1 more source

A note on closed vector fields

AIMS Mathematics
Special vector fields, such as conformal vector fields and Killing vector fields, are commonly used in studying the geometry of a Riemannian manifold. Though there are Riemannian manifolds, which do not admit certain conformal vector fields or certain ...
Nasser Bin Turki , Sharief Deshmukh , Olga Belova   +2 more
doaj   +1 more source

Slant submanifolds of Golden Riemannian manifolds [PDF]

Journal of Mathematical Extension Vol. 13, No. 4, (2019), 23-39, 2018
In this paper, we study slant submanifolds of Riemannian manifolds with Golden structure. A Riemannian manifold $(\tilde{M},\tilde{g},{\varphi})$ is called a Golden Riemannian manifold if the $(1,1)$ tensor field ${\varphi}$ on $\tilde{M}$ is a golden structure, that is ${\varphi}^{2}={\varphi}+I$ and the metric $\tilde{g}$ is ${\varphi}-$ compatible ...
arxiv  

A study on the combination of functional connection features and Riemannian manifold in EEG emotion recognition. [PDF]

Front Neurosci, 2023
Wu M, Ouyang R, Zhou C, Sun Z, Li F, Li P.   +5 more
europepmc   +1 more source

On $(N(k),ξ)$-semi-Riemannian manifolds: Pseudosymmetries [PDF]

arXiv, 2012
Definition of $({\cal T}_{a},{\cal T}_{b})$-pseudosymmetric semi-Riemannian manifold is given. $({\cal T}_{a},{\cal T}_{b})$-pseudosy mmetric $(N(k),\xi)$-semi-Riemannian manifolds are classified. Some results for ${\cal T}_{a}$-pseudosymmetric $(N(k),\xi)$-semi-Riemannian manifolds are obtained.
arxiv