Inflation with scalar-tensor theory of gravity
  The latest released data from Planck in 2018, put up tighter constraints on
inflationary parameters. In the present article, the in-built symmetry of the
non-minimally coupled scalar-tensor theory of gravity is used to fix the
coupling parameter, the functional Brans-Dicke parameter, and the potential of
the theory. It is found that all the three different power-law potentials and
one exponential, pass these constraints comfortably, and also gracefully exit
from inflation.
