THE PHASE-STRUCTURE OF PURE REGGE GRAVITY

We examine the phase structure of pure Regge gravity in four dimension s and compare our Monte Carlo results with Z(2)-link Regge-theory as w ell as with another formulation of lattice gravity derived from group theoretical considerations. Within all three models we find an extensi on of the well-defined phase to negative gravitational coupling and a new phase transition. In contrast to the well-known transition at posi tive coupling there is evidence for a continuous phase transition whic h might be essential for a possible continuum limit.