Zobrazeno 1 - 10
of 459
pro vyhledávání: '"DE, UDAY CHAND"'
Publikováno v:
International Journal of Geometric Methods in Modern Physics, 2024
This article delivers the characterization of a pseudo $B$ symmetric spacetimes and we illustrate that a pseudo $B$ symmetric spacetime admitting Codazzi type of $B$-tensor represents a perfect fluid spacetime and if this spacetime admits the time-li
Externí odkaz:
http://arxiv.org/abs/2408.16976
Autor:
De, Krishnendu, De, Uday Chand
Publikováno v:
Modern Physics Letters A (2024)
In this paper we introduce and characterize a pseudo generalized Ricci-recurrent spacetimes and produce an example to verify the existence of such a spacetime. Then we demonstrate that a conformally flat generalized Ricci-recurrent spacetime with cer
Externí odkaz:
http://arxiv.org/abs/2407.07104
Autor:
De, Uday Chand, De, Krishnendu
Publikováno v:
Chinese Journal of Physics (2024)
In this article we introduce and characterize a pseudo generalized Ricci-recurrent spacetimes. At first, we produce an example to justify the existence of such a spacetime. Then, it is provided that a pseudo generalized Ricci-recurrent generalized Ro
Externí odkaz:
http://arxiv.org/abs/2406.16113
Publikováno v:
Publ. Math. Debrecen (2024) 329-341
In this article, we characterize a Lorentzian manifold $\mathcal{M}$ with a semi-symmetric metric connection. At first, we consider a semi-symmetric metric connection whose curvature tensor vanishes and establish that if the associated vector field i
Externí odkaz:
http://arxiv.org/abs/2406.16108
Publikováno v:
Turk J Math (2023) 47: 1236-1246
In this article, we presumed that a perfect fluid is the source of the gravitational field while analyzing the solutions to the Einstein field equations. With this new and creative approach, here we study $k$-almost yamabe solitons and gradient $k$-a
Externí odkaz:
http://arxiv.org/abs/2402.15868
Publikováno v:
Fortschr. Phys. 2023, 2200201
The main aim of this article is to investigate a spacetime of quasi-constant sectional curvature. At first, the existence of such a spacetime is established by several examples. We have shown that a spacetime of quasi-constant sectional curvature agr
Externí odkaz:
http://arxiv.org/abs/2402.15859
Publikováno v:
International journal of geometric methods in modern physics 2024
This article concerns with the characterization of a spacetime and modified gravity, such as $f\left(R,G\right)$, $f\left(R,T\right)$ and $f\left(R,L_{m}\right)$-gravity equipped with the projective curvature tensor. We establish that a projectively
Externí odkaz:
http://arxiv.org/abs/2402.15854
Publikováno v:
Kraguevac Journal of Mathematics 49(3) (2025), 387-400
This article carries out the investigation of a three-dimensional Riemannian manifold $N^3$ endowed with a semi-symmetric type non-metric connection. Firstly, we construct a non-trivial example to prove the existence of a semi-symmetric type non-metr
Externí odkaz:
http://arxiv.org/abs/2402.15846
Publikováno v:
Quaestiones Mathematicae (2023)
In this paper we assume that a perfect fluid is the source of the gravitational field while analyzing the solutions to the Einstein field equations.
Externí odkaz:
http://arxiv.org/abs/2402.15354
Publikováno v:
Heliyon (2024)
In this article, we examine gradient type Ricci solitons and $(m,\tau)$-quasi Einstein solitons in generalized Robertson-Walker ($GRW$) spacetimes. Besides, we demonstrate that in this scenario the $GRW$ spacetime presents the Robertson-Walker ($RW$)
Externí odkaz:
http://arxiv.org/abs/2402.15339