0 graviton is not a ghost * f'' 0 scalaron is not a tachyon * imposed for R \ge R_{now} at least (i.e. during the whole evolution of the Universe) * possible ...
Cosmo.WebHome Thu 17 Sep 2009 Nemanja KALOPER inflaton etc * inflaton difficult but not impossible to obtain * T^4, topological mass term ... Arman ...
violation of weak equivalence principle * %$\Rightarrow (a A)/(a A) \sim 10^{ 13} $% * present bounds = 10^{ 12} probably need to go to space to get ...