Marking the 20th year since inception as the Solid Modeling Symposium, this conference is being held in cooperation with ACM SIGGRAPH and the SIAM Activity Group on Geometric Design (pending). The focus of the conference is on the mathematical and computational issues that arise in generating, analyzing, and processing geometric information in applications such as: mechanical design, process planning, manufacturing, medicine, games, animation, geology, and virtual reality. The scope of activities encompasses a wide spectrum of scientific, technological, and other skills, ranging from rigorous mathematics to the subjective aesthetics of shape.