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hep-th1991
Topology Change in General Relativity
Gary T. Horowitz
A review is given of recent work on topology changing solutions to the first order form of general relativity. These solutions have metrics which are smooth everywhere, invertible…
hep-th1991
Ashtekar's Approach to Quantum Gravity
Gary T. Horowitz
A review is given of work by Abhay Ashtekar and his colleagues Carlo Rovelli, Lee Smolin, and others, which is directed at constructing a nonperturbative quantum theory of general…