Nuprl Lemma : assert_of_bnot
9,38
postcript
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ProofTree
Definitions
t
T
,
P
Q
,
P
Q
,
x
:
A
.
B
(
x
)
,
ff
,
if
b
then
t
else
f
fi
,
tt
,
A
,
b
,
b
,
P
Q
,
,
True
,
P
Q
,
False
,
Unit
,
,
Lemmas
bool
wf
,
true
wf
,
false
wf
origin