  We consider branes $N=I\times\so$, where $\so$ is an $n$\ndash dimensional
space form, not necessarily compact, in a Schwarzschild-AdS_{(n+2)} bulk $\mc
N$. The branes have a big crunch singularity. If a brane is an ARW space, then,
under certain conditions, there exists a smooth natural transition flow through
the singularity to a reflected brane $\hat N$, which has a big bang singularity
and which can be viewed as a brane in a reflected Schwarzschild-AdS_{(n+2)}
bulk $\hat{\mc N}$. The joint branes $N\uu \hat N$ can thus be naturally
embedded in $R^2\times \so$, hence there exists a second possibility of
defining a smooth transition from big crunch to big bang by requiring that
$N\uu\hat N$ forms a $C^\infty$-hypersurface in $R^2\times \so$. This last
notion of a smooth transition also applies to branes that are not ARW spaces,
allowing a wide range of possible equations of state.
