I'm a theoretical physicist (old-amateur/hobbyist division).
3 Is it mathematically possible or topologically allowable for cutouts, or cavities, to exist in a 3-manifold? Jan 22 '13
2 Does the total mass of an isolated object include the mass stored in its gravitational field? Sep 13 '13
2 How does gravity escape a black hole? Feb 14 '13
2 Is spacetime moving in general relativity? Mar 8 '13
-1 Does a black hole have an interior or does the spacetime manifold itself end at the event horizon? [closed] Oct 22 '13