Nuprl Lemma : comp_id_l
13,42
postcript
pdf
A
,
B
:Type,
f
:(
A
B
). (Id{
B
} o
f
) =
f
latex
Up
fun
1
,
fun
1
Definitions
Id{
T
}
,
t
T
,
Id
,
f
o
g
,
x
:
A
.
B
(
x
)
Lemmas
eta
conv
origin
A, B:Type, f:(A
B). (Id{B} o f) = f A, B:Type, f:(AB). (Id{B} o f) = f 
Tx:A. B(x)