Up the Hill and Down Again

Click to increase image sizeClick to decrease image size AcknowledgmentsWe are thankful for the LaTeX wizardry of our colleagues Xiaozhou Ding and David Richeson.Additional informationNotes on contributorsDon Chakerian Don Chakerian (dmandgd@aol.com) received his Ph.D. from UC Berkeley and is Emeritus Professor of Mathematics at the University of California, Davis. His area of research is the theory of convex sets and geometric inequalities. He earned the George Pólya Award from the MAA in 1981 for his paper Circles and Spheres, College Mathematics Journal, vol.11, pp.26–41. In it, he mentions an elegant proof of a theorem of N.A. Court, found by one of his favorite undergraduate students, by name of Steve Erfle.Stephen Erfle Stephen Erfle (erfle@dickinson.edu) took as many classes as he could from Don Chakerian while attending UC Davis as an undergraduate. He received his Ph.D. in Economics from Harvard and is Professor of International Business and Management at Dickinson College. He is currently working on a recreational mathematics book entitled Playing with Polygons. Some of the Excel files that form the backbone of this book allow users to produce electronic string art on a polygonal vertex frame. Some images were sufficiently interesting that he enticed his mentor and now coauthor into jointly working on this paper.