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Einstein frame or Jordan frame ?
Valerio Faraoni, Edgard Gunzig
Scalar-tensor theories of gravity can be formulated in the Jordan or in the Einstein frame, which are conformally related. The issue of which conformal frame is physical is a conte…
Illusions of general relativity in Brans-Dicke gravity
Valerio Faraoni
Contrary to common belief, the standard tenet of Brans-Dicke theory reducing to general relativity when omega tends to infinity is false if the trace of the matter energy-momentum…
Tales of tails in cosmology
Valerio Faraoni, Edgard Gunzig
Late time mild inflation (LTMI) proposes to solve the age of the universe problem and the discrepancy between locally and globally measured values of the Hubble parameter. However,…
Solving for the dynamics of the universe
Valerio Faraoni
A new method of solving the Einstein-Friedmann dynamical equations of a spatially homogeneous and isotropic universe is presented. The method is applicable when the equation of sta…