Nuprl Lemma : rng_sum_plus
11,40
postcript
pdf
r
:Rng,
a
,
b
:
.
(
a
b
)
(
E
,
F
:({
a
..
b
}
|
r
|).
(
(
r
)
a
i
<
b
.
E
(
i
) +
r
F
(
i
)) = ((
(
r
)
a
i
<
b
.
E
(
i
)) +
r
(
(
r
)
a
i
<
b
.
F
(
i
)))
|
r
|)
latex
Definitions
IMonoid
,
t
T
,
IAbMonoid
,
x
:
A
.
B
(
x
)
,
t
.2
,
t
.1
,
,
P
&
Q
,
Mon
,
Group{i}
,
AbGrp
,
r
+gp
,
*
,
|
g
|
,
(
r
)
i
k
<
j
.
E
(
k
)
Lemmas
rng
wf
,
abgrp
wf
,
comm
wf
,
grp
id
wf
,
grp
op
wf
,
grp
car
wf
,
monoid
p
wf
,
add
grp
of
rng
wf
b
,
mon
itop
op
origin