DECEMBER 19, 2009
Jordan Ellenberg wrote up Massively Collaborative Mathematics for the NY Times Sunday Magazine's 9th Annual Year in Ideas--and what an idea this one was. Inspired by open-source enterprises such as Linux and Wikipedia, it used blogs and a wiki to mediate a fully open collaboration. In the Polymath Project, everything was out in the open, so anybody could potentially contribute to any aspect. Tongue twister? No, mind bender.