Nuprl Lemma : w-initially_wf
0,22
postcript
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the_w
:World,
x
,
i
:Id. (
x
initially
i
)
vartype(
i
;
x
)
latex
Definitions
vartype(
i
;
x
)
,
Id
,
World
,
x
:
A
.
B
(
x
)
,
t
T
,
(
x
initially
i
)
Lemmas
w-s
wf
,
world
wf
,
Id
wf
origin
the_w:World, x, i:Id. (x initially i) 
vartype(i;x) the_w:World, x, i:Id. (x initially i) vartype(i;x) x:A. B(x) T