Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsCesàro Summationhttp://demonstrations.wolfram.com/CesaroSummation/]]>http://demonstrations.wolfram.com/CesaroSummation/Summation by Partshttp://demonstrations.wolfram.com/SummationByParts/]]>http://demonstrations.wolfram.com/SummationByParts/Laser Diffraction Patternhttp://demonstrations.wolfram.com/LaserDiffractionPattern/]]>http://demonstrations.wolfram.com/LaserDiffractionPattern/