Matter creation and primordial CMB Spectrum in the inflationless
  Milne-like cosmologies
  We present a new insight into the interpretation of the primordial spectrum
of scalar particles density perturbations. On the assumption of spectrum
universality, i.e., that the mean energy density and the typical value of
inhomogeneity can be chosen arbitrarily in the framework of the model
considered, the form of the spectrum becomes completely defined. It is close to
the flat Harrison-Zeldovich spectrum, but with the suppressed low-frequency
modes.
