The Value of Singularities
arXiv:gr-qc/9503062 · doi:10.1007/BF02113073
Abstract
We point out that spacetime singularities play a useful role in gravitational theories by eliminating unphysical solutions. In particular, we argue that any modification of general relativity which is completely nonsingular cannot have a stable ground state. This argument applies both to classical extensions of general relativity, and to candidate quantum theories of gravity.
5 pages, no figures; a few clarifying comments added