Ma-Schlenker C-octahedra in the 2-sphere

John C. Bowers, Philip L. Bowers

We present constructions inspired by the Ma-Schlenker example of [9] that show the non-rigidity of spherical inversive distance cicle packings. In contrast to the use in [9] of an infinitesimally flexible Euclidean polyhedron, embeddings in de Sitter space, and Pogorelov maps, our elementary constructions use only the inversive geometry of the 2-sphere.