Cl_Y6u6V924vTH%7C1_3Buviafae46x %7C1_=ZouMy8OZYl&v=0&aty=4> This had previously been the subject of some debate i= the mathematical community until Donald Knuth set things straight in 1992= so it's understandable that some confusion... Read More » <http://www.quora.com/qemail/track_=lick?uid=aCOKOCLsX1Z&aoi