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A central problem of designing machine is to control the motion of some parts. For instance: how can a machine draw a perfect straight line using only rigid bars and rotating joints? Beginning with the basic idea of a linkage, this lecture explains how geometric constraints translate into motion and why circular arcs arise so naturally. The mathematical problem is then to understand all possible motion with such linkage assembly, linking abstract geometry to concrete mechanical motion. A lecture by Professor Alain Goriely This event is also available to watch live online. To register, visit: How to Draw a Straight Line? The Mathematics of Linkages | Gresham College Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham College's mission, please consider making a donation: Donate Today | Gresham College

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