Compact maximal hypersurfaces in stably causal spacetimes
  Several uniqueness results on compact maximal hypersurfaces in a wide class of sta- bly causal spacetimes are given. They are obtained from the study of a distinguished function on the maximal hypersurface, under suitable natural first order conditions of the spacetime. As a consequence several applications to Geometric Analysis are given. 
Rafael M. Rubio and Juan J. Salamanca
math.DG