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.Comment: 2 pages, one Post-Script figure, MNRAS LaTeX Style (mn.sty),
submitted to MNRA