Results 101 to 110 of about 7,610 (173)

Conformal Einstein solitons on a perfect fluid spacetime

Boletim da Sociedade Paranaense de Matemática
The objective of this research is to investigate the geometrical composition of a perfect fluid spacetime with a torse-forming vector field in connection with Conformal Einstein Soliton and Conformal -Einstein Soliton. Also, We have studied the conditions for a Conformal Einstein Soliton to be shrinking or expanding or steady.
Shivaprasanna G. S., Md. Samiul Haque, Somashekhara G.   +2 more
openaire   +1 more source

Naked Singularities in the Einstein-Euler System. [PDF]

Ann PDE, 2023
Guo Y, Hadzic M, Jang J.
europepmc   +1 more source

Geometrothermodynamic Cosmology. [PDF]

Entropy (Basel), 2023
Luongo O, Quevedo H.
europepmc   +1 more source

Perfect fluid spacetimes with harmonic generalized curvature tensor [PDF]

, 2019
We show that n-dimensional perfect fluid spacetimes with divergence-free conformal curva- ture tensor and constant scalar curvature are generalized Robertson Walker (GRW) spacetimes; as a consequence a perfect fluid Yang pure space is a GRW spacetime.
C. A. Mantica, U. C. De, Y. J. Suh, L. G. Molinari   +3 more
openaire   +2 more sources

Vaidya geometries and scalar fields with null gradients. [PDF]

Eur Phys J C Part Fields, 2021
Faraoni V, Giusti A, Fahim BH.
europepmc   +1 more source

First Integrals of Shear-Free Fluids and Complexity. [PDF]

Entropy (Basel), 2021
Gumede SC, Govinder KS, Maharaj SD.
europepmc   +1 more source

Rainich-type Conditions for Perfect Fluid Spacetimes

, 2014
In this worksheet we describe and illustrate a relatively simple set of new Rainich-type conditions on an n-dimensional spacetime which are necessary and sufficient for it to define a perfect fluid solution of the Einstein field equations. Procedures are provided which implement these Rainich-type conditions and which reconstruct the perfect fluid from
Krongos, Dionisios, Torre, Charles G
openaire   +1 more source

Inhomogeneous and Radiating Composite Fluids. [PDF]

Entropy (Basel), 2021
Brassel BP, Maharaj SD, Goswami R.
europepmc   +1 more source

100 years of mathematical cosmology: Models, theories, and problems, Part A. [PDF]

Philos Trans A Math Phys Eng Sci, 2022
Cotsakis S, Yefremov AP.
europepmc   +1 more source

Anisotropic Strange Star in 5D Einstein-Gauss-Bonnet Gravity. [PDF]

Entropy (Basel), 2021
Jasim MK, Maurya SK, Maurya SK, Singh KN, Nag R.   +4 more
europepmc   +1 more source