  We provide a graphical description of the entanglement of pure-state
multiparty systems based on an analogy between a bipartite purity analysis and
the centroid of a collection of point masses. This description applies to
quantum systems with $N$ parties, each with an arbitrary number of (discrete)
states. The case of $N$ qubits is highlighted for simplicity. This geometric
description illustrates some of the restrictions in the form of inequalities
that apply to entanglement in multiparty systems.
