Thank you for the insights Henry. I call it a linked list just because the primer calls the act of joining boxes together "linking", but I see why that introduces ambiguity. I just mean a list of things.
I think your analysis regarding a rank 1 1 assumption is correct so far as I understand it. Could you help me understand this: x f"1 1"1 _ y Is there some reference you could point me at to understand what _ does here? I can't see anything in Nuvoc that fits the bill since presumably it's not a negation, infinity or a NaN? Emir ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
