Theory of non-local point transformations - Part 1: Representation of   Teleparallel Gravity
  In this paper the extension of the functional setting customarily adopted in General Relativity (GR) is considered. For this purpose, an explicit solution of the so-called Einstein's\ Teleparallel problem is sought. This is achieved by a suitable extension of the traditional concept of GR reference frame and is based on the notion of non-local point transformation (NLPT). In particular, it is shown that a solution to the said problem can be reached by introducing a suitable subset of transformations denoted here as \textit{special} \textit{NLPT}. These are found to realize a phase-space transformation connecting\emph{\}the flat Minkowski space-time with, in principle, an arbitrary curved space-time. The functional setting and basic properties of the new transformations are investigated. 
Massimo Tessarotto (Department of Mathematics and Geosciences,   University of Trieste, Italy and Institute of Physics, Facu...
gr-qc