Leslie Greengard

Leslie Frederick Greengard (born 1957) is an American mathematician, physicist and computer scientist. He is co-inventor with Vladimir Rokhlin Jr. of the fast multipole method (FMM) in 1987, recognized as one of the top-ten algorithms of the 20th century.

Greengard was elected as a member of the National Academy of Engineering in 2006 for work on the development of algorithms and software for fast multipole methods. Provided by Wikipedia