Albert Einstein "invented" special and general relatively which has proven almost completely unassailable and extremely useful (as far as it goes). He spent the rest of his life seeking a unified field theory. Physicists are still struggling with the latter.
Ken Iverson invented APL (notation and, with help, an interpreter). APL proved to be a mathematical, commercial, and educational success (as far as it went). He spent the rest of his life seeking to improve on it with J. While the benefit to mathematics of J is arguable, the commercial and educational usefulness is not yet obvious. Are we in a "string theory" battle with the edge conditions of J? With great respect to Ken, Jim ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
