Transformation Groups for a Schwarzschild-Type Geometry in f(R) Gravity

Abstract

We know that the Lorentz transformations are special relativistic coordinate transformations between inertial frames. What happens if we would like to find the coordinate transformations between noninertial reference frames? Noninertial frames are known to be accelerated frames with respect to an inertial frame. Therefore these should be considered in the framework of general relativity or its modified versions. We assume that the inertial frames are flat space-times and noninertial frames are curved space-times; then we investigate the deformation and coordinate transformation groups between a flat space-time and a curved space-time which is curved by a Schwarzschild-type black hole, in the framework of ( ) gravity. We firstly study the deformation transformation groups by relating the metrics of the flat and curved space-times in spherical coordinates; after the deformation transformations we concentrate on the coordinate transformations. Later on, we investigate the same deformation and coordinate transformations in Cartesian coordinates. Finally we obtain two different sets of transformation groups for the spherical and Cartesian coordinates.

Why the Spacetime Embedding Incompressible Cores of Pulsars Must Be Conformally Flat?

“…, , , f e F τ ρ ϑ ψ = and discuss their physical consistences (see [9] [10] and the references therein). As the line element, ds, should be invariant under the transformation, both metrics are related to each other through:…”