(8steps total)
PrintForm
Definitions
list
1
Sections
StandardLIB
Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
nth
tl
wf
1
1
1.
A
: Type
2.
as
:
A
List
3.
i
:
4.
i
0
nth_tl(
i
;
as
)
A
List
By:
(MoveToConcl 2 THEN IntInd 2 THEN UnivCD) THEN (Try Arith)
Generated subgoals:
1
2. 0
0
3.
as
:
A
List
nth_tl(0;
as
)
A
List
1
step
2
2.
i
:
3. 0<
i
4.
i
-1
0
(
as
:
A
List. nth_tl(
i
-1;
as
)
A
List)
5.
i
0
6.
as
:
A
List
nth_tl(
i
;
as
)
A
List
3
steps
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
(8steps total)
PrintForm
Definitions
list
1
Sections
StandardLIB
Doc