Cosmological Solutions of a Nonlocal Model with a Perfect Fluid
  A nonlocal gravity model which does not assume the existence of a new
dimensional parameter in the action and includes a function $f(\Box^{-1} R)$,
with $\Box$ the d'Alembertian operator, is studied. By specifying an
exponential form for the function f and including a matter sector with a
constant equation of state parameter, all available power-law solutions in the
Jordan frame are obtained. New power-law solutions in the Einstein frame are
also probed. Furthermore, the relationship between power-law solutions in both
frames, established through conformal transformation, is substantially
clarified. The correspondence between power-law solutions in these two frames
is proven to be a very useful tool in order to obtain new solutions in the
Einstein frame.
