Nuprl Lemma : comb_for_firstn_wf
2,24
postcript
pdf
(
A
,
as
,
n
,
z
. firstn(
n
;
as
))
A
:Type
(
A
List)
True
(
A
List)
latex
Definitions
True
,
t
T
,
x
:
A
.
B
(
x
)
,
T
Lemmas
firstn
wf
,
squash
wf
,
true
wf
origin
A,as,n,z. firstn(n;as)) 
A:Type
(A List)
True(A List) A,as,n,z. firstn(n;as)) A:Type(A List)True(A List) T
x:A. B(x)T