Bracing Regular Polygons As We Race into the Future
Greg N. Frederickson · College Mathematics Journal · 2011
SummaryHow many rods does it take to brace a square in the plane? Once Martin Gardner's network of readers got their hands on it, it turned out to be fewer than Raphael Robinson, who originally posed the problem, thought. And who could have predicted the stunning solutions found subsequently for various generalizations of the problem?