Phys. Rev. Lett. 28, 1082–1085 (1972)Role of Conformal Three-Geometry in the Dynamics of GravitationReceived 2 February 1972; published in the issue dated 17 April 1972 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. © 1972 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.28.1082
DOI:
10.1103/PhysRevLett.28.1082
PACS:
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