N-body summation

2 methods in the atlas attack this one problem. They are rivals: each wins something the others do not.

Phrasings that mean this problem

N-body and integral equationsN-body simulation

numerical-pde

Fast multipole methodHierarchical far-field expansionstandardnumerical-pde
Barnes-HutOctree center-of-mass approximationcanonnumerical-pde