Power spectrum for perturbations in an inflationary model for a closed
  universe
  We derive the power spectrum of primordial quantum fluctuations in an
inflationary universe for curvature parameter ${\mathcal K}=1$. This is
achieved through a Born--Oppenheimer type of approximation scheme from the
Wheeler--DeWitt equation of canonical quantum gravity using gauge-invariant
variables. Compared to the flat model, the closed model exhibits a deficit of
power at large scales.
