User:Pao.christ/sandbox

he deviations from Newtonian gravity \cite{newton} in the centrally symmetric static case, i.e. slowing of time, light deflection and precession of orbits have played a fundamental role for the confirmation of General Relativity (GR) \cite{einstein}.

It is in any case not clear whether the full GR theory is necessary for the prediction of such effects. In particular to what extent the above three crucial tests could be derived only or mainly from Special Relativity (SR) has been explored in \cite{schiff}, but its conclusions have  been criticized by \cite{schild} \cite{rind}. In addition the possibility of their derivation from a restricted number of assumptions has been the subject of many investigation \cite{schiff}, \cite{cern}, \cite{gru},  \cite{vis},   \cite{padma},  \cite {kass} and  ref.s therein.

The purpose of the present paper is to proceed along these lines showing that an elementary derivation is indeed possible and  clarifying the necessary ingredients.