Topology of COBE Microwave Background Fluctuations
  We have measured the topology (genus) of the fluctuations in the cosmic microwave background seen in the recently completed (four-year) data set produced by the COBE satellite. We find that the genus is consistent with that expected from a random-phase Gaussian distribution, as might be produced naturally in inflationary models. 
Wesley N. Colley, J. Richard Gott, III, (Department of Astrophysical   Sciences, Princeton University), and Changbom Park (D...