  For asymptotically flat spacetimes the Penrose inequality gives an initial
data test for the weak cosmic censorship hypothesis. We give a formulation of
this inequality for asymptotically anti-deSitter (AAdS) spacetimes, and show
that the inequality holds for time asymmetric data in spherical symmetry. Our
analysis is motivated by the constant-negative-spatial-curvature form of the
AdS black hole metric.
