Abstract
The gravitational action is not always additive in the usual sense. We provide a general prescription for the change in action that results when different portions of the boundary of a spacetime are topologically identified. We discuss possible implications for the superposition law of quantum gravity. We present a definition of ‘‘generalized additivity’’ which does hold for arbitrary spacetime composition.
- Received 8 March 1994
DOI:https://doi.org/10.1103/PhysRevD.50.4914
©1994 American Physical Society
