(35steps total) PrintForm Definitions Lemmas mb event system 7 Sections EventSystems Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: spanner-root-exists 1 1
1. T : Id
2. to : |T|(IdLnk List)
3. from : |T|(IdLnk List)
4. f : Edge(T)
5. bi-graph(T;to;from)
6. i,j:|T|.
6. p:Edge(T) List. 
6. lconnects(p;i;j) & (q:Edge(T) List. lconnects(q;i;j)  q = p)
7. L : |T| List
8. i:|T|. (i  L)
9. j : |T|
10. bi-graph(T;to;from)
11. spanner(f;T;to;from)
12. n : 
13. p:Edge(T) List. lpath(p)  ||p||n
14. ||to(j)|| = 0
  i:|T|. spanner-root(f;T;to;from;i)
By: InstConcl [j] THEN Unfold `spanner-root` 0 THEN Unfold `l_member` -1 THEN ExRepD

Generated subgoals:

None

About:
listboolintnatural_numberfunctionequalimpliesandallexists
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

(35steps total) PrintForm Definitions Lemmas mb event system 7 Sections EventSystems Doc