Results 61 to 70 of about 8,378,483 (177)

Geodesic connectedness of a spacetime with a causal Killing vector field. [PDF]

We study the geodesic connectedness of a globally hyperbolic spacetime (M, g) admitting a complete smooth Cauchy hypersurface S and endowed with a complete causal Killing vector field K.
Bartolo, Rossella
core  

Statistical Killing vector fields on the Hopf hypersurfaces in the complex space forms [PDF]

Statistical Killing vector field is introduced and Hopf hypersurfaces of complex space forms with the condition of being structural statistical Killing vector field are studied.
Abedi, Esmaiel, Ilmakchi, Mohamad, Mosadegh Kordmahaleh, Najma, Moghanian, Nasibeh   +3 more
core   +1 more source

Effective field theory for non-relativistic hydrodynamics

Journal of High Energy Physics, 2020
We write down a Schwinger-Keldysh effective field theory for non-relativistic (Galilean) hydrodynamics. We use the null background construction to covariantly couple Galilean field theories to a set of background sources.
Akash Jain
doaj   +1 more source

Generalized supergravity equations for the WZW model

Physics Letters B
Generalized supergravity equations (GSEs) were originally proposed as a modification of the standard IIB supergravity equations to satisfy the background of η-deformed AdS5×S5 introduced by Arutyunov et al.
Ali Eghbali, Simin Ghasemi-Sorkhabi, Adel Rezaei-Aghdam   +2 more
doaj   +1 more source

Killing vector fields in three dimensions: a method to solve massive gravity field equations [PDF]

, 2010
Killing vector fields in three dimensions play an important role in the construction of the related spacetime geometry. In this work we show that when a three-dimensional geometry admits a Killing vector field then the Ricci tensor of the geometry is ...
Metin Gürses, Gürses, M., Gurses, Metin   +2 more
core   +1 more source

*-Ricci soliton on (κ, μ)′-almost Kenmotsu manifolds

Open Mathematics, 2019
Let (M, g) be a non-Kenmotsu (κ, μ)′-almost Kenmotsu manifold of dimension 2n + 1. In this paper, we prove that if the metric g of M is a *-Ricci soliton, then either M is locally isometric to the product ℍn+1(−4)×ℝn or the potential vector field is ...
Dai Xinxin, Zhao Yan, Chand De Uday
doaj   +1 more source

Killing Reeb vector fields on some almost contact manifolds [PDF]

Mathematica Bohemica
We discuss the geometric impact of a Killing vector field on certain almost contact manifolds with constant sectional curvatures. We prove that the additional structures given in A. De Nicola, G. Dileo, I. Yudin (2018) can be naturally constructed in the
Fortuné Massamba
doaj   +1 more source

Riemann Solitons on Relativistic Bulk-Viscous Fluid String Spacetime

International Journal of Mathematics and Mathematical Sciences
In this article, we undertake a comprehensive study of almost Riemann solitons and their gradient counterparts within the framework of relativistic bulk-viscous fluid string (BVFS) geometries. We begin by analyzing the potential vector field. It is shown
Mehdi Jafari, Shahroud Azami
doaj   +1 more source

On completeness of orbits of Killing vector fields [PDF]

Classical and Quantum Gravity, 1993
16 pages, Latex, preprint NSF-ITP-93 ...
openaire   +2 more sources

Killing vector fields on semiriemannian manifolds

Killing vector fields on semiriemannian manifolds, 1989
Itiswellknown thata Killingvectorfieldon a riemannian compact manifold is holonomic (Kostant (4)). In other words, the Ax operator(Ax=Lx―Vx=― VX) liesin the holomony algebra of the manifold. The covariant derivative of Ax gives us a curvature transfor- mation.
openaire   +3 more sources