Closed timelike smooth curves in the general theory of relativity
Abstract
For a spacetime which admits a closed timelike smooth curve it is estimated thatτ ∼2 · 10^{24} · √ l ^{2}, where τ is the real time and l the spatial length associated with the timelike curve, and ρ is the density of material.
 Publication:

Soviet Physics Journal
 Pub Date:
 September 1973
 DOI:
 10.1007/BF00890880
 Bibcode:
 1973SvPhJ..16.1215G