So is the article describing a notation from which the typical dyadic verb form of apl and j evolved and became even more general? If so, I did not realize that such a notation is so historically new.
Maybe if Roger would rename the two primitives !. and !: as Stirling numbers of the first and second kind, we could get Knuth to become a spokesperson. Does Knuth know about j forks? ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
