Nuprl Lemma : eq_cons_imp_eq_tls
2,24
postcript
pdf
A
:Type,
a
,
b
:
A
,
as
,
bs
:
A
List. (
a
.
as
) = (
b
.
bs
)
as
=
bs
latex
Definitions
t
T
,
Prop
,
x
:
A
.
B
(
x
)
,
tl(
l
)
,
P
Q
Lemmas
tl
wf
origin
A:Type, a, b:A, as, bs:A List. (a.as) = (b.bs) 
as = bs A:Type, a, b:A, as, bs:A List. (a.as) = (b.bs) as = bs 
Tx:A. B(x) Q