Nuprl Lemma : fpf-is-empty_wf
11,40
postcript
pdf
A
:Type,
f
:fpf(
A
;
x
.top). fpf-is-empty(
f
)
latex
Definitions
x
:
A
.
B
(
x
)
,
t
T
,
fpf-is-empty(
f
)
,
t
.1
,
x
.
t
(
x
)
,
fpf(
A
;
a
.
B
(
a
))
,
x
(
s
)
Lemmas
eq
int
wf
,
length
wf1
,
fpf
wf
,
top
wf
origin
A:Type, f:fpf(A; x.top). fpf-is-empty(f) 
A:Type, f:fpf(A; x.top). fpf-is-empty(f) x:A. B(x) T
x. t(x)