Abstract
The unconstrained dynamical degrees of freedom of the gravitational field are identified with the conformally invariant three-geometries of spacelike hypersurfaces. New results concerning the action principle, choice of canonical variables, and initial-value equations strengthen this identification. One of the new canonical variables is shown to play the role of "time" in the formalism.
- Received 2 February 1972
DOI:https://doi.org/10.1103/PhysRevLett.28.1082
©1972 American Physical Society
