Nuprl Lemma : l_succ_wf
4,23
postcript
pdf
T
:Type,
l
:
T
List,
x
:
T
,
P
:(
T
Prop).
y
= succ(
x
) in
l
P
(
y
)
Prop
latex
Definitions
t
T
,
Prop
,
||
as
||
,
P
Q
,
False
,
A
,
A
B
,
,
x
:
A
.
B
(
x
)
,
l
[
i
]
,
x
(
s
)
,
y
= succ(
x
) in
l
P
(
y
)
Lemmas
nat
wf
,
length
wf1
,
select
wf
origin
T:Type, l:T List, x:T, P:(T
Prop). y = succ(x) in l
P(y) 
Prop T:Type, l:T List, x:T, P:(TProp). y = succ(x) in l P(y) Prop T Q
A
B
x:A. B(x) P(y)