Nuprl Lemma : append_wf
11,40
postcript
pdf
T
:Type,
as
,
bs
:(
T
List). append(
as
;
bs
)
(
T
List)
latex
Definitions
t
T
,
x
:
A
.
B
(
x
)
,
Y
,
append(
as
;
bs
)
origin
T:Type, as,bs:(T List). append(as; bs) 
(T List) T:Type, as,bs:(T List). append(as; bs) (T List) Tx:A. B(x)