I have a list that ends ... d c b a . I want to create a new list that ends
... d' = d U (c U (b U a) U a) U (b U a) U a = d U c' c' = c U (b U a) U a = c U b' b' = (b U a) = b U a' a' = a where U is some verb. It seems that there should be some form of / \. etc. that produces this, but I can't find it. Help! Henry Rich ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
