Minimum convex partition of a constrained point set

A convex partition with respect to a point set S is a planar subdivision whose vertices are the points of S, where the boundary of the unbounded outer face is the boundary of the convex hull of S, and every bounded interior face is a convex polygon. A minimum convex partition with respect to S is a convex partition of S such that the number of convex polygons is minimised. In this paper, we will present a polynomial time algorithm to nd a minimum convex partition with respect to a point set S where S is constrained to lie on the boundaries of a xed number of nested convex hulls.