Nuprl Lemma : sq_stable__inv_funs
12,41
postcript
pdf
A
,
B
:Type,
f
:(
A
B
),
g
:(
B
A
). SqStable(InvFuns(
A
;
B
;
f
;
g
))
latex
ProofTree
Definitions
t
T
,
,
InvFuns(
A
;
B
;
f
;
g
)
,
x
:
A
.
B
(
x
)
,
P
Q
Lemmas
sq
stable
equal
,
tidentity
wf
,
compose
wf
,
sq
stable
and
origin
A, B:Type, f:(A
B), g:(BA). SqStable(InvFuns(A;B;f;g))
A, B:Type, f:(AB), g:(BA). SqStable(InvFuns(A;B;f;g))
T
x:A. B(x)
Q