> My question is about x being a directed graph.
> Do all directed graphs consist of as many links as there are nodes?
> Or is this example in some sense a special case?
Directed out tree with root I.@([EMAIL PROTECTED]) x
x=:1 4 5 5 7 6 9 9 10 12 11 14 14 15 16 18 18 18 20 20 20
in this case 20 is root.
┌─┐
└─20─┬─18─┬─15───13
│ ├─16───14─┬─11───10─── 8
│ │ └─12─── 9─┬─ 6─── 5─┬─ 2
│ │ │ └─ 3
│ │ └─ 7─── 4─── 1─── 0
│ └─17
└─19
--
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
