Results 31 to 40 of about 85,733 (177)

Primordial Magnetogenesis from Killing Vector Fields

open access: yesUniverse
Papapetrou showed that the covariant derivative of a Killing vector field satisfies Maxwell’s equations in vacuum. Papapetrou’s result is extended, in this article, and it is shown that the covariant derivative of a Killing vector field satisfies Maxwell’
Nagabhushana Prabhu
doaj   +1 more source

Concircular vector fields for Kantowski Sachs and Bianchi type III spacetimes

open access: yes, 2017
This paper intends to obtain concircular vector fields of Kantowski Sachs and Bianch type III spacetimes. For this purpose, ten conformal Killing equations and their general solution in the form of conformal Killing vector fields are derived along with ...
Ali, Ahmad T   +2 more
core   +1 more source

On the Theory of Killing Orbits in Space-Time

open access: yes, 2003
This paper gives a theoretical discussion of the orbits and isotropies which arise in a space-time which admits a Lie algebra of Killing vector fields.
Abraham R   +27 more
core   +1 more source

Killing Vector Fields of Invariant Metrics on Five-Dimensional Solvable Lie Groups

open access: yesMathematics
In this paper we study the existence of Killing vector fields for right-invariant metrics on five-dimensional Lie groups. We begin by providing some explanation of the classification lists of the low-dimensional Lie algebras.
Gerard Thompson
doaj   +1 more source

Killing vectors in asymptotically flat space-times: I. Asymptotically translational Killing vectors and the rigid positive energy theorem [PDF]

open access: yes, 1995
We study Killing vector fields in asymptotically flat space-times. We prove the following result, implicitly assumed in the uniqueness theory of stationary black holes.
Gibbons G. W.   +5 more
core   +2 more sources

Some New Results on Trans-Sasakian Manifolds

open access: yesJournal of Mathematics, 2022
In this paper, we classify trans-Sasakian manifolds which are realized as real hypersurfaces in a complex space form. We also investigate trans-Sasakian manifolds whose Reeb vector fields are harmonic-Killing.
Lei Wang, Yan Zhao
doaj   +1 more source

Analytic Extension of Riemannian Analytic Manifolds and Local Isometries

open access: yesMathematics, 2020
This article deals with a locally given Riemannian analytic manifold. One of the main tasks is to define its regular analytic extension in order to generalize the notion of completeness.
Vladimir A. Popov
doaj   +1 more source

On Killing vector fields and Newman–Penrose constants [PDF]

open access: yesJournal of Mathematical Physics, 2000
Asymptotically flat space–times with one Killing vector field are studied. The Killing equations are solved asymptotically using polyhomogeneous expansions (i.e., series in powers of 1/r and ln r), and solved order by order. The solution to the leading terms of these expansions yields the asymptotic form of the Killing vector field.
openaire   +3 more sources

A new method to compute quasi-local spin and other invariants on marginally trapped surfaces

open access: yes, 2009
We accurately compute the scalar 2-curvature, the Weyl scalars, associated quasi-local spin, mass and higher multipole moments on marginally trapped surfaces in numerical 3+1 simulations.
Jasiulek, Michael
core   +1 more source

Sufficient Conditions for Periodicity of a Killing Vector Field [PDF]

open access: yesProceedings of the American Mathematical Society, 1973
Let X X be a complete Killing vector field on an n n -dimensional connected Riemannian manifold. Our main purpose is to show that if X X has as few as n n closed orbits which are located properly with respect to each other, then X X must have periodic flow ...
openaire   +1 more source

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