Nuprl Lemma : strong-subtype-l_member-type
11,40
postcript
pdf
A
,
B
:Type. strong-subtype(
A
;
B
)
(
L
:(
A
List),
x
:
B
. (
x
L
)
(
x
A
))
latex
Definitions
x
:
A
.
B
(
x
)
,
P
Q
,
t
T
,
S
T
,
x
:
A
.
B
(
x
)
,
A
B
,
A
,
False
,
,
strong-subtype(
A
;
B
)
,
A
c
B
,
(
x
l
)
,
Lemmas
l
member
wf
,
strong-subtype
wf
,
select
wf
origin
A, B:Type. strong-subtype(A;B) 
(L:(A List), x:B. (x 
L) (x A)) A, B:Type. strong-subtype(A;B) (L:(A List), x:B. (x L) (x A)) x:A. B(x) Q T
T
x:A. B(x)
B
A
B l)