Nuprl Lemma : do-apply-compose'
11,40
postcript
pdf
A
,
B
,
C
:Type,
g
:(
A
(
B
+ Top)),
f
:(
A
B
C
),
x
:
A
.
(
can-apply(
f
o'
g
;
x
))
(do-apply(
f
o'
g
;
x
) ~ (
f
(
x
,do-apply(
g
;
x
))))
latex
ProofTree
Definitions
False
,
t
T
,
P
Q
,
b
,
True
,
left
+
right
,
Top
,
x
:
A
B
(
x
)
,
x
:
A
.
B
(
x
)
,
s
=
t
,
f
(
a
)
,
do-apply(
f
;
x
)
,
can-apply(
f
;
x
)
,
f
o'
g
,
Type
Lemmas
true
wf
,
false
wf
origin