(9steps total)
PrintForm
Definitions
list
1
Sections
StandardLIB
Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
firstn
wf
2
1.
A
: Type
2.
A
List
3.
u
:
A
4.
v
:
A
List
5.
n
:
. firstn(
n
;
v
)
A
List
n
:
. firstn(
n
;
u
.
v
)
A
List
By:
(RecEval [`firstn`] 0) THEN (Analyze 0)
Generated subgoal:
1
6.
n
:
if 0<
n
u
.firstn(
n
-1;
v
) else nil fi
A
List
5
steps
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
(9steps total)
PrintForm
Definitions
list
1
Sections
StandardLIB
Doc
n:
. firstn(n;v) 
A List
n
u.firstn(n-1;v) else nil fi 
