2 papers
gr-qc2021
Perfect fluid spacetimes and gradient solitons
Krishnendu De Uday Chand De, Abdallah Abdelhameed Syied, Nasser Bin Turki +1
This article deals with the investigation of perfect fluid spacetimes endowed with concircular vector field. It is shown that in a perfect fluid spacetime with concircular vector f…
math.DG2019
The -curvature tensor on relativistic space-times
H. M. Abu-donia, Sameh Shenawy, A. A. Syied
This paper aims to study the -curvature tensor on relativistic space-times. The energy-momentum tensor T of a space-time is semi-symmetric given that the -curvature tensor is…