Abstract
General Relativity (GR) has proven to be fruitful and successful for almost a century, yet we know that it is not the ultimate description of the gravitational force. Hints of where to search for the limits of GR and indications on how the new theory of gravity should be can be found in different ways. Here we suggest that the role of boundary terms in canonical formulations of GR could be important towards a better understanding of inertia and how solutions of Einstein's field equations should be interpreted.
Daniele Malafarina