Nuprl Lemma : and_assoc
12,41
postcript
pdf
A
,
B
,
C
:
. (
A
& (
B
&
C
))
((
A
&
B
) &
C
)
latex
ProofTree
Definitions
t
T
,
P
Q
,
P
Q
,
P
&
Q
,
P
Q
,
,
x
:
A
.
B
(
x
)
Lemmas
rev
implies
wf
,
iff
wf
origin
A, B, C:
. (A & (B & C)) 
((A & B) & C)
A, B, C:. (A & (B & C)) ((A & B) & C)
T Q Q Qx:A. B(x)