Nuprl Lemma : compat-append2
0,22
postcript
pdf
T
:Type,
as
,
cs
,
bs
,
ds
:
T
List.
as
@
bs
||
cs
@
ds
as
=
cs
bs
||
ds
latex
Definitions
t
T
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l1
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l2
,
P
Q
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:
A
.
B
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x
)
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as
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Prop
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False
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hd(
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A
B
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tl(
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P
Q
Lemmas
tl
wf
,
ge
wf
,
hd
wf
,
non
neg
length
,
length
wf1
,
compat-cons
,
compat
wf
,
append
wf
origin