Nuprl Lemma : es-is-interface-image
11,40
postcript
pdf
es
:ES,
A
:Type,
f
:Top,
Ia
:AbsInterface(
A
),
e
:E. (
e
f
'
Ia
) ~ (
e
Ia
)
latex
Definitions
t
T
,
x
:
A
.
B
(
x
)
,
do-apply(
f
;
x
)
,
f
o
g
,
can-apply(
f
;
x
)
,
f
'
Ia
,
e
X
,
P
Q
,
ff
,
tt
,
outl(
x
)
,
if
b
then
t
else
f
fi
,
isl(
x
)
,
AbsInterface(
A
)
Lemmas
event
system
wf
,
top
wf
,
es-interface
wf
,
es-E
wf
origin
es:ES, A:Type, f:Top, Ia:AbsInterface(A), e:E. (e 
f'Ia) ~ (e Ia) es:ES, A:Type, f:Top, Ia:AbsInterface(A), e:E. (e f'Ia) ~ (e Ia) Tx:A. B(x) X
Q