Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsLogarithmic Integral on the Critical Linehttp://demonstrations.wolfram.com/LogarithmicIntegralOnTheCriticalLine/]]>http://demonstrations.wolfram.com/LogarithmicIntegralOnTheCriticalLine/