Hierarchical Subdivision of the Simple Cubic Lattice

Abstract: The simple cubic lattice defines a set of points at regular distances. The volume of the Voronoi cells around each point may serve as a weight for integration over the entire space. We add interstitial points to this grid according to the rule that these have maximum distance to the existing points, or by the equivalent rule that they are placed at the vertices of the Voronoi cells of the existing lattice. Choices of that kind appear in numerical sampling with maximum independent data points if the numerical expense of computing values represented at the lattice points is high. The volumes and shapes of the Voronoi cells of these enriched/supersampled lattices are discussed in detail while this insertion is recursively executed three times in succession.