Nuprl Lemma : equipollent-zero
11,40
postcript
pdf
A
:Type.
A
~ {0..0
}
(
A
)
latex
Definitions
{
i
..
j
}
,
x
:
A
B
(
x
)
,
Bij(
A
;
B
;
f
)
,
x
:
A
B
(
x
)
,
x
:
A
.
B
(
x
)
,
t
T
,
x
:
A
.
B
(
x
)
,
,
Void
,
P
Q
,
False
,
A
,
P
Q
,
P
&
Q
,
P
Q
,
Type
,
A
~
B
,
f
(
a
)
,
#$n
,
A
B
,
i
j
<
k
,
,
{
x
:
A
|
B
(
x
)}
,
x
.
A
(
x
)
,
s
=
t
,
Surj(
A
;
B
;
f
)
,
Inj(
A
;
B
;
f
)
Lemmas
int
seg
wf
,
biject
wf
origin
A:Type. A ~ {0..0
} 
(
A) A:Type. A ~ {0..0} (A) }
B(x)
B(x)
x:A. B(x)
Tx:A. B(x)
QA Q Q
B j < k
x.A(x)