The stability of Einstein static universe in the DGP braneworld
  The stability of an Einstein static universe in the DGP braneworld scenario
is studied in this paper. Two separate branches denoted by $\epsilon=\pm1$ of
the DGP model are analyzed. Assuming the existence of a perfect fluid with a
constant equation of state, $w$, in the universe, we find that, for the branch
with $\epsilon=1$, there is no a stable Einstein static solution, while, for
the case with $\epsilon=-1$, the Einstein static universe exists and it is
stable when $-1<w<-1/3$. Thus, the universe can stay at this stable state
past-eternally and may undergo a series of infinite, non-singular oscillations.
Therefore, the big bang singularity problem in the standard cosmological model
can be resolved.
