Primordial power spectra for curved inflating universes
  Exact numerical primordial primordial power spectra are computed and plotted
for the for the best-fit Planck 2018 curved universe parameters. It is found
that the spectra have generic cut-offs and oscillations within the observable
window for the level of curvature allowed by current CMB measurements and
provide a better fit to current data. Derivations for the Mukhanov-Sasaki
equation for curved universes are presented and analysed, and theoretical
implications for the quantum and classical initial conditions for inflation are
discussed within the curved regime.
