Cosmological renormalization of model parameters in the second-order
  perturbation theory
  It is shown that the serious problem on the cosmological tension between the
direct measurements of the Hubble constant at present and the constant derived
from the Planck measurements of the CMB anisotropies can be solved by
considering the renormalized model parameters. They are deduced by taking the
spatial average of second-order perturbations in the flat Lambda-CDM model,
which includes random adiabatic fluctuations.
