Nuprl Lemma : do-apply_wf
11,40
postcript
pdf
A
,
B
:Type,
f
:(
A
(
B
+ top)),
x
:
A
. (
can-apply(
f
;
x
))
(do-apply(
f
;
x
)
B
)
latex
Definitions
t
T
,
f
(
a
)
,
top
,
x
:
A
.
B
(
x
)
,
isl(
x
)
,
b
,
P
Q
,
outl(
x
)
,
do-apply(
f
;
x
)
,
can-apply(
f
;
x
)
,
x
:
A
B
(
x
)
,
left
+
right
,
Type
Lemmas
outl
wf
,
assert
wf
,
isl
wf
,
top
wf
origin
A,B:Type, f:(A
(B + top)), x:A. (
can-apply(f; x)) 
(do-apply(f; x) 
B) A,B:Type, f:(A(B + top)), x:A. (can-apply(f; x)) (do-apply(f; x) B) Tx:A. B(x)b QB(x)