(13steps total) PrintForm Definitions Lemmas mb list 1 Sections MarkB generic Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: firstn is iseg 2
1. T : Type
2. L1 : T List
3. L2 : T List
4. n : (||L2||+1)
5. L1 = firstn(n;L2)
  l:T List. L2 = (L1 @ l)
By: InstConcl [nth_tl(n;L2)]

Generated subgoal:

1   L2 = (L1 @ nth_tl(n;L2))
1 step

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

(13steps total) PrintForm Definitions Lemmas mb list 1 Sections MarkB generic Doc