On Schwarzschild's Topology in Brane-Worlds
  The topological structure of Schwarzschild's space-time and its maximal analytic extension are investigated in context of brane-worlds. Using the embedding coordinates, these geometries are seen as different states of the evolution of a single brane-world. Comparing the topologies and the embeddings it is shown that this evolution must be followed by a signature change in the bulk. 
Edmundo M. Monte (U.F.Paraiba) and M.D.Maia (U.Brasilia)