ABSTRACT
We argue that there may exist spacetime defects embedded in Minkowski spacetime which have negative active gravitational mass. One such spacetime defect then repels a test particle, corresponding to what may be called "antigravity."
ABSTRACT
We argue that there may exist spacetime defects embedded in Minkowski spacetime which have negative active gravitational mass. One such spacetime defect then repels a test particle, corresponding to what may be called "antigravity."