Basic HTML version of Foils prepared 5 October 98

Foil 13 Basic Idea of Fast Multipole Algorithm

From Earthquake Prediction as Example of N Body Computations CPS615 INtroduction to Computational Science -- Fall Semester 1998. by Geoffrey C. Fox
1 These ideas came from many people: Appel, Barnes-Hut, Greengard and Rokhlin
2 Salmon (Caltech) and Warren(Los Alamos) implemented very well for astrophysics with upto 108 particles
3 Instead of summing over the M stars in a far away cluster, "just" replace by the contribution of the centroid
4 Fast Multipole "just" applies this idea recursively with a sum over multipoles extending simple centroid formula.
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