The object of the present paper is to study weakly B symmetric manifolds (WBS)n . At first some geometric properties of (WBS)n (n > 2) have been studied. Finally, we consider (WBS)4 spacetimes. They turn out to be both perfect and imperfect fluids Robertson-Walker space-times: an equation of state is provided in the first case, and in the second the nature of the bulk viscosity pressure is pointed out. Also, we construct an example of a (WBS)4 .
On weakly B symmetric pseudo Riemannian manifolds and its applications / C. Mantica, U. De, Y. Suh. - In: FILOMAT. - ISSN 0354-5180. - 35:3(2021), pp. 895-909. [10.2298/FIL2103895M]
On weakly B symmetric pseudo Riemannian manifolds and its applications
C. Mantica
Primo
;
2021
Abstract
The object of the present paper is to study weakly B symmetric manifolds (WBS)n . At first some geometric properties of (WBS)n (n > 2) have been studied. Finally, we consider (WBS)4 spacetimes. They turn out to be both perfect and imperfect fluids Robertson-Walker space-times: an equation of state is provided in the first case, and in the second the nature of the bulk viscosity pressure is pointed out. Also, we construct an example of a (WBS)4 .
| File | Dimensione | Formato | |
|---|---|---|---|
|
0354-51802103895M.pdf
accesso aperto
Tipologia:
Publisher's version/PDF
Dimensione
227.76 kB
Formato
Adobe PDF
|
227.76 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
