Nuprl Lemma : member_map
11,40
postcript
pdf
T
,
T'
:Type,
a
:(
T
List),
x
:
T'
,
f
:(
T
T'
). (
x
map(
f
;
a
))
(
y
:
T
. ((
y
a
)
(
x
=
f
(
y
))))
latex
Definitions
False
,
A
,
A
B
,
prop{i:l}
,
t
T
,
P
Q
,
P
Q
,
A
c
B
,
P
Q
,
x
:
A
.
B
(
x
)
,
(
x
l
)
,
P
Q
,
x
:
A
.
B
(
x
)
,
lelt(
i
;
j
;
k
)
,
int_seg(
i
;
j
)
,
Lemmas
select
wf
,
map
wf
,
length
wf1
,
nat
wf
,
le
wf
,
map
select
,
map
length
,
non
neg
length
origin
T,T':Type, a:(T List), x:T', f:(T
T'). (x 
map(f; a)) 
(
y:T. ((y a) 
(x = f(y)))) T,T':Type, a:(T List), x:T', f:(TT'). (x map(f; a)) (y:T. ((y a) (x = f(y)))) 
A
B T Q Q B Qx:A. B(x) l) Qx:A. B(x)