Results 11 to 20 of about 36 (34)

A mathematical note about a FLRW universe embedded in a universe without time

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
In this paper we propose to study a six-dimensional Friedmann-Lemaître-Robertson-Walker (FLRW) universe without time. The way we study this timeless universe is the classic one: we highlight future oriented time-like loops and closed chains of future ...
Sburlan Cristina
doaj   +1 more source

Pseudosymmetry and curvature inheritance of the interior black hole spacetime

Physics Letters B
The notion of pseudosymmetry by Adamów and Deszcz [1] generalizes the concept of local symmetry and semisymmetry, and it serves as a model of various spacetimes. The classification of pseudosymmetric spacetimes has been studied in [2].
Absos Ali Shaikh, Foued Aloui, Kamiruzzaman, Ibrahim Al-Dayel   +3 more
doaj   +1 more source

The Equations of Motion of a Null Curve in Lightlike Cone of 3-Dimensonal Minkowski Space

, 2009
In this article we investigate null curves in the lightlike cone of 3-dimensional Lorentz Minkowski space and give some characterizations of these curves.We also obtain the equations of motion of a null curve in the lightlike cone. Mathematics Subject
Erdogan, Mehmet, Alo, Jeta, Yilmaz, Gulsen   +2 more
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Régularité Lipschitzienne des Géodésiques Minimisantes pour Quelques Distributions Affines

, 2008
2000 Mathematics Subject Classification: 49J15, 49J30, 53B50.In the context of sub-Riemannian geometry and the Lipschitzian regularity of minimizers in control theory, we investigate some properties of minimizing geodesics for certain affine ...
Bensalem, Naceurdine
core  

On canonical screen for lightlike submanifolds of codimension two

Open Mathematics, 2007
Duggal K.
doaj   +1 more source

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Some geometric and physical properties of pseudo ψ-conharmonically symmetric manifolds

Quaestiones Mathematicae, 2023
Krishnendu De, Uday Chand De
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Almost η-Ricci and almost η-Yamabe solitons with torse-forming potential vector field

Quaestiones Mathematicae, 2022
Cihan Özgür, Adara-Monica Blaga
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Rocky Mountain Journal of Mathematics, 2020
Adara-Monica Blaga
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Almost quasi-Yamabe solitons and gradient almost quasi-Yamabe solitons in paracontact geometry

Quaestiones Mathematicae, 2021
Krishnendu De, Uday Chand De
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Semiconformal curvature tensor and perfect fluid spacetimes in general relativity

Journal of Taibah University for Science, 2020
Naeem Ahmad Pundeer, Musavvir Ali, Akram Ali   +2 more
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