Consider a golf ball in the center of an empty sphere (maybe a GR vacuum, I'm not so sure). Consider this empty sphere as being the only space available to the golf ball, it is surrounded by nether. Now give the ball a push.
Is there a mathematical formalism that can describe the evolution of the ball in such conditions (motion-wise, particularly at the frontier of the available space) ?
I realize that this is a highly speculative question that may pose several issues, I'm not so much interested in weither the experiment is possible as I am in knowing the theoretical frames that could represent such conditions (mainly, how do we interpret/represent nether in physics; do we ?)