Nuprl Lemma : once-p_wf
0,22
postcript
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i
,
a
:Id,
es
:ES. @
i
locl(
a
) occurs once
Prop
latex
Definitions
Id
,
t
T
,
ES
,
x
:
A
.
B
(
x
)
,
loc(
e
)
,
s
=
t
,
E
,
{
x
:
A
|
B
(
x
) }
,
x
:
A
B
(
x
)
,
Prop
,
kind(
e
)
,
Knd
,
P
Q
,
locl(
a
)
,
x
.
t
(
x
)
,
e
@
i
.
P
(
e
)
,
e
@
i
.
P
(
e
)
,
x
:
A
B
(
x
)
,
P
&
Q
,
@
i
locl(
a
) occurs once
Lemmas
existse-at
wf
,
alle-at
wf
,
locl
wf
,
Knd
wf
,
es-kind
wf
,
es-E
wf
,
es-loc
wf
,
event
system
wf
,
Id
wf
origin
i, a:Id, es:ES. @i locl(a) occurs once 
Prop i, a:Id, es:ES. @i locl(a) occurs once Prop Tx:A. B(x)
B(x)
Q
x. t(x)e@i. P(e)
e@i.P(e)
B(x)