Turning a Sphere Inside Out
- annos singulos: 1979
- Patriam: United States of America
- genus: Documentary
- Studio: The Topology Films Project, Case Western Reserve University, Education Development Center (E/D/C), International Film Bureau
- keyword: mathematics, topology, number theory, 3d animation
- Director: Nelson Max
- cast: Nelson Max, Stephen Smale, Charles Pugh, Judith Bregman
