Geometric Folding Algorithms: Linkages, Origami, PolyhedraHow can linkages, pieces of paper, and polyhedra be folded? The authors present hundreds of results and over 60 unsolved 'open problems' in this comprehensive look at the mathematics of folding, with an emphasis on algorithmic or computational aspects. Folding and unfolding problems have been implicit since Albrecht D rer in the early 1500s, but have only recently been studied in the mathematical literature. Over the past decade, there has been a