Nuprl Lemma : rel_star_iff
11,40
postcript
pdf
T
:Type,
R
:(
T
T
prop{i:l}),
x
,
y
:
T
.
(
x
rel_star(
T
;
R
)
y
)
((
z
:
T
. ((
x
rel_star(
T
;
R
)
z
)
(
z
R
y
)))
(
x
=
y
))
latex
Definitions
x
:
A
.
B
(
x
)
,
prop{i:l}
,
P
Q
,
x
f
y
,
rel_star(
T
;
R
)
,
P
Q
,
x
:
A
.
B
(
x
)
,
P
Q
,
P
Q
,
P
Q
,
t
T
,
,
A
B
,
A
,
False
,
guard(
T
)
,
A
c
B
,
T
,
True
,
rel_exp(
T
;
R
;
n
)
,
Y
,
if
b
then
t
else
f
fi
,
(
i
=
j
)
,
tt
Lemmas
nat
wf
,
rel
exp
wf
,
rel
exp
iff
,
le
wf
,
squash
wf
,
true
wf
origin