Abstract: George W. Hart will show slides of some of his mathematically informed sculptures. These include works made of metal, wood, acrylic, or found objects, and often use laser-cutting or rapid prototyping technologies in their realization. Also shown will be brief videos of the assembly of three large commissions: a six-foot sculpture constructed from 642 CDROMs in the Computer Science building at U.C. Berkeley, a five-foot sculpture constructed at a community "barn raising" event, and a "Salamanders" sculpture assembled by students when he was artist in residence at MIT. Mathematical and computer science aspects of these designs will be discussed. For examples of Hart's work, see www.georgehart.com.