Cosmon inflation
  The cosmon field responsible for dynamical dark energy can induce an
inflationary period in early cosmology. Details depend on dilatation symmetry
breaking terms in its potential and kinetic term that are relevant only during
early stages of the evolution of the universe. For a large range of parameters
we find realistic primordial density fluctuations. As a particular example we
discuss a model with almost static geometry in the Jordan frame for all epochs
of cosmology. Here the cosmic evolution of the Hubble parameter is replaced by
a variation of the Planck mass and particle masses. This model predicts a
spectral index $n=0.97$ and a ratio for tensor to scalar fluctuations $r=0.13$.
