Nuprl Lemma : strong-subtype-deq-subtype
0,22
postcript
pdf
A
,
B
:Type. strong-subtype(
A
;
B
)
EqDecider(
B
)
EqDecider(
A
)
latex
Definitions
strong-subtype(
A
;
B
)
,
EqDecider(
T
)
,
x
:
A
.
B
(
x
)
,
P
Q
,
t
T
Lemmas
strong-subtype-deq
,
deq
wf
,
strong-subtype
wf
origin
A, B:Type. strong-subtype(A;B) 
EqDecider(B) 
EqDecider(A) A, B:Type. strong-subtype(A;B) EqDecider(B) EqDecider(A) x:A. B(x) Q
T