I note that we can elide the parens: +/v%#v
Which is shorter than (+/%#)v . Further, it contains only one word more than the "obvious minimum" of the "essential" five + / % # v . By the same token, the APL solution can be similarly condensed: +/v div rho v which is identical, if we allow that % # and div rho are analogs, is identical. Roger: if we prohibit cheats like ".'+/v%#v' (containing only 2 words), are you aware of a solution shorter than 6 words? -Dan ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
