On Modified Gravity
  We consider some aspects of nonlocal modified gravity, where nonlocality is
of the type $R \mathcal{F}(\Box) R$. In particular, using ansatz of the form
$\Box R = c R^\gamma,$ we find a few $R(t)$ solutions for the spatially flat
FLRW metric. There are singular and nonsingular bounce solutions. For late
cosmic time, scalar curvature R(t) is in low regime and scale factor a(t) is
decelerated. R (t) = 0 satisfies all equations when k = -1.
