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5 papers · 1 filter
Weyl collineations that are not curvature collineations
Ibrar Hussain, Asghar Qadir, K. Saifullah
Though the Weyl tensor is a linear combination of the curvature tensor, Ricci tensor and Ricci scalar, it does not have all and only the Lie symmetries of these tensors since it is…
Does Charge Contribute to the Frame Dragging of Spacetime?
Babur M. Mirza
Electrically charged systems bound by a strong gravitational force can sustain a huge amount of electric charge (up to 10^20C) against Coulomb repulsion. General relativistically s…
Homotheties of Cylindrically Symmetric Static Manifolds and their Global Extension
Asghar Qadir, M. Sharif, M. Ziad
Cylindrically symmetric static manifolds are classified according to their homotheties and metrics. In each case the homothety vector fields and the corresponding metrics are obtai…
General Formula for the Momentum Imparted to Test Particles in Arbitrary Spacetimes
Asghar Qadir, M. Sharif
Ehlers and Kundt have provided an approximate procedure to demonstrate that gravitational waves impart momentum to test particles. This was extended to cylindrical gravitational wa…
The Relativistic Generalization of the Gravitational Force for Arbitrary Spacetimes
Asghar Qadir, M. Sharif
It has been suggested that re-expressing relativity in terms of forces could provide fresh insights. The formalism developed for this purpose only applied to static, or conformally…