Nuprl Lemma : member-ite
0,22
postcript
pdf
b
:
,
T
:Type,
A
,
B
:
T
List,
x
:
T
. (
x
if
b
A
else
B
fi)
b
& (
x
A
)
b
& (
x
B
)
latex
Definitions
Unit
,
b
,
,
Prop
,
x
:
A
.
B
(
x
)
,
P
Q
,
P
Q
,
True
,
t
T
,
P
Q
,
(
x
l
)
,
{
T
}
,
P
&
Q
,
A
,
P
Q
,
False
Lemmas
false
wf
,
not
wf
,
l
member
wf
,
true
wf
,
bool
wf
origin