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At:
last with property
1
2
2
1
1
1. T : Type
2. L : T List
3. P :
||L||
Prop
4.
x:
||L||. Dec(P(x))
5. i :
||L||
6. P(i)
7. L1 : T List
8. L2 : T List
9. f1 :
||L1||

||L||
10. f2 :
||L2||

||L||
11. ||L|| = ||L1||+||L2||
12. increasing(f1;||L1||)
13.
j:
||L1||. L1[j] = L[(f1(j))]
14. increasing(f2;||L2||)
15.
j:
||L2||. L2[j] = L[(f2(j))]
16.
j1:
||L1||, j2:
||L2||.
f1(j1) = f2(j2)
17.
i:
||L1||. P(f1(i))
18.
i:
||L2||.
P(f2(i))
19.
i:
||L||.
19. (P(i) 
(
j:
||L1||. f1(j) = i)) & (
P(i) 
(
j:
||L2||. f2(j) = i))
20. 0<||L1||
21. j :
||L||
22. f1(||L1||-1)<j
23. P(j)
24.
P(j) 
(
j@0:
||L2||. f2(j@0) = j)
25. j@0 :
||L1||
26. f1(j@0) = j
27.
x,y:
||L1||. x<y 
f1(x)<f1(y)
False
By: |
Decide (j@0<||L1||-1) |
Generated subgoals:
1 |
28. j@0<||L1||-1
False
 | 1 step |
2 |
28. j@0<||L1||-1
False
 | 1 step |
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html