Nuprl Lemma : strong-subtype-ext-equal
0,22
postcript
pdf
A
,
B
:Type.
B
A
A
B
strong-subtype(
A
;
B
)
latex
Definitions
Prop
,
x
:
A
.
B
(
x
)
,
x
:
A
.
B
(
x
)
,
P
Q
,
t
T
,
strong-subtype(
A
;
B
)
,
A
&
B
origin
A, B:Type. B 
A 
A B strong-subtype(A;B) A, B:Type. B A A B strong-subtype(A;B) 
x:A. B(x)x:A. B(x) Q
T