IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
bi-graph-from wf11112 1. G : Id 2. to : |G|(IdLnk List)
3. from : |G|(IdLnk List)
4. bi-graph(G;to;from)
5. x : |G|
6. v : IdLnk List
7. from(x) = v 8. (lv.(lfrom(x)))
v Edge(G) List