1. For a discussion of this conjecture and its relevance to the cosmic censorship conjecture see Moncrief, V., Eardley, D.: Gen. Rel. Grav.13, 887 (1981)
2. Eardley, D., Smarr, L.: Phys. Rev.D19, 2239 (1979). This paper discusses primarily the analogous conjecture in the non-compact case and introduces the notion of ?crushing singularities? which will play an important role in the present paper
3. The hypersurfaces of transitivity of the isometry group automatically have constant mean curvature in such models. This result is independent of Einstein's equations
4. Gowdy, R.: Ann. Phys. (N.Y.)83, 203 (1974). See also Gowdy, R.: Phys. Rev. Lett.27, 826 and 1102(E) (1971)
5. Marsden, J., Tipler, F.: Phys. Rep.66, 109 (1980)