Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsA Conjecture of Apoloniusz Tyszka on the Addition of Rational Numbershttp://demonstrations.wolfram.com/AConjectureOfApoloniuszTyszkaOnTheAdditionOfRationalNumbers/]]>http://demonstrations.wolfram.com/AConjectureOfApoloniuszTyszkaOnTheAdditionOfRationalNumbers/