e/Fast multipole method

Information
has gloss	eng: The fast multipole method (FMM) is a mathematical technique that was developed to speed up the calculation of long-ranged forces in the n-body problem. It does this by expanding the system Green's function using a multipole expansion, which allows one to group sources that lie close together and treat them as if they are a single source.
lexicalization	eng: fast multipole method
instance of	e/Numerical ordinary differential equations