Exact numerical primordial primordial power spectra are computed and plotted for the best-
fit Planck 2018 curved universe parameters. It is found that the spectra have generic cutoffs …

We investigate the effects of nonzero spatial curvature on cosmic inflation in light of cosmic
microwave background (CMB) anisotropy measurements from the Planck Legacy 2018 …

In order to investigate the potential observational signals of different regularization
ambiguities in loop quantum cosmological models, we systematically compute and compare …

The discovery of gravitational waves from merging binary black holes has generated
considerable interest in examining whether these black holes could have a primordial origin …

When a differential equation exhibits chaos, stiffness, damping and/or oscillation in its
solution component, such a differential equation is termed rigid. Over the years, solving such …

Second-order oscillatory problems have been found to be applicable in studying various
phenomena in science and engineering; this is because these problems have the …

We extend the work of Contaldi et al.[J. Cosmol. Astropart. Phys. 07 (2003) 002. JCAPBP
1475-7516 10.1088/1475-7516/2003/07/002] and derive analytical approximations for …

We discuss the challenges of motivating, constructing, and quantizing a canonically
normalized inflationary perturbation in spatially curved universes. We show that this has …

It is well known that second order linear ordinary differential equations with slowly varying
coefficients admit slowly varying phase functions. This observation is the basis of the …

We introduce an efficient numerical method for second-order linear ODEs whose solution
may vary between highly oscillatory and slowly changing over the solution interval. In …