Nuprl Lemma : w-act_wf
0,22
postcript
pdf
the_w
:World,
e
:E. act(
e
)
{
a
:Action(loc(
e
))|
isnull(
a
) }
latex
Definitions
E
,
loc(
e
)
,
act(
e
)
,
False
,
P
Q
,
Action(
i
)
,
A
,
b
,
isnull(
a
)
,
1of(
t
)
,
a(
i
;
t
)
,
2of(
t
)
,
,
Id
,
x
.
t
(
x
)
,
x
:
A
.
B
(
x
)
,
t
T
,
World
Lemmas
world
wf
,
pi2
wf
,
w-a
wf
,
pi1
wf
,
w-isnull
wf
,
assert
wf
,
not
wf
,
nat
wf
,
Id
wf
origin
the_w:World, e:E. act(e) 
{a:Action(loc(e))| 
isnull(a) } the_w:World, e:E. act(e) {a:Action(loc(e))| isnull(a) } 
QA
b
x. t(x)x:A. B(x) T