Nuprl Lemma : append_assoc
11,40
postcript
pdf
T
:Type,
as
,
bs
,
cs
:(
T
List).
append((append(
as
;
bs
));
cs
) = append(
as
; (append(
bs
;
cs
)))
(
T
List)
latex
Definitions
t
T
,
x
:
A
.
B
(
x
)
,
Y
,
append(
as
;
bs
)
,
P
Q
,
P
Q
,
P
Q
,
P
Q
Lemmas
append
wf
origin
T:Type, as,bs,cs:(T List).
(T List) T:Type, as,bs,cs:(T List).
(T List) Tx:A. B(x)
Q
Q
Q Q