Grey circles: Weighted generators. Blue circles: Circumcircles. White edges: Edges of the Apollonius diagram. References: 1. Gavrilova, M., & Rokne, J. (2000, March 8). Another Solution of Apollonius Tenth Problem. 2. Kim, D.-S., Kim, D., & Sugihara, K. (2001). Voronoi Diagram of a Circle Set From Voronoi Diagram of a Point Set: I. Topology. Computer Aided Geometric Design, 18(6), 541--562. doi:10.1016/S0167-8396(01)00050-4 3. Kim, D.-S., Kim, D., & Sugihara, K. (2001). Voronoi Diagram of a Circle Set From Voronoi Diagram of a Point Set: II. Geometry. Computer Aided Geometric Design, 18(6), 563--585. doi:10.1016/S0167-8396(01)00051-6