Reheating in Constant-roll $F(R)$ Gravity
  In this work we address the reheating issue in the context of $F(R)$ gravity,
for theories that the inflationary era does not obey the slow-roll condition
but the constant-roll condition is assumed. As it is known, the reheating era
takes place after the end of the inflationary era, so we investigate the
implications of a constant-roll inflation era on the reheating era. We quantify
our considerations by calculating the reheating temperature for the
constant-roll $R^2$ model and we compare to the standard reheating temperature
in the context of $F(R)$ gravity. As we demonstrate, the new reheating
temperature may differ from the standard one, and in addition we show how the
reheating era may restrict the constant-roll era by constraining the
constant-roll parameter.
