http://blogs.scientificamerican.com/roots-of-unity/2014/11/30/the-saddest-thing-i-know-about-the-integers/?print=true http://blogs.scientificamerican.com/roots-

http://blogs.scientificamerican.com/roots-of-unity/2014/11/30/the-saddest-thing-i-know-about-the-integers/?print=true http://blogs.scientificamerican.com/roots-of-unity/2014/11/3... here's a link to the print version, the floating 20% off horror for black friday and cyber monday are gone, thank god.