Step |
Hyp |
Ref |
Expression |
1 |
|
gsummulc1.b |
|- B = ( Base ` R ) |
2 |
|
gsummulc1.z |
|- .0. = ( 0g ` R ) |
3 |
|
gsummulc1.p |
|- .+ = ( +g ` R ) |
4 |
|
gsummulc1.t |
|- .x. = ( .r ` R ) |
5 |
|
gsummulc1.r |
|- ( ph -> R e. Ring ) |
6 |
|
gsummulc1.a |
|- ( ph -> A e. V ) |
7 |
|
gsummulc1.y |
|- ( ph -> Y e. B ) |
8 |
|
gsummulc1.x |
|- ( ( ph /\ k e. A ) -> X e. B ) |
9 |
|
gsummulc1.n |
|- ( ph -> ( k e. A |-> X ) finSupp .0. ) |
10 |
|
ringcmn |
|- ( R e. Ring -> R e. CMnd ) |
11 |
5 10
|
syl |
|- ( ph -> R e. CMnd ) |
12 |
|
ringmnd |
|- ( R e. Ring -> R e. Mnd ) |
13 |
5 12
|
syl |
|- ( ph -> R e. Mnd ) |
14 |
1 4
|
ringrghm |
|- ( ( R e. Ring /\ Y e. B ) -> ( x e. B |-> ( x .x. Y ) ) e. ( R GrpHom R ) ) |
15 |
5 7 14
|
syl2anc |
|- ( ph -> ( x e. B |-> ( x .x. Y ) ) e. ( R GrpHom R ) ) |
16 |
|
ghmmhm |
|- ( ( x e. B |-> ( x .x. Y ) ) e. ( R GrpHom R ) -> ( x e. B |-> ( x .x. Y ) ) e. ( R MndHom R ) ) |
17 |
15 16
|
syl |
|- ( ph -> ( x e. B |-> ( x .x. Y ) ) e. ( R MndHom R ) ) |
18 |
|
oveq1 |
|- ( x = X -> ( x .x. Y ) = ( X .x. Y ) ) |
19 |
|
oveq1 |
|- ( x = ( R gsum ( k e. A |-> X ) ) -> ( x .x. Y ) = ( ( R gsum ( k e. A |-> X ) ) .x. Y ) ) |
20 |
1 2 11 13 6 17 8 9 18 19
|
gsummhm2 |
|- ( ph -> ( R gsum ( k e. A |-> ( X .x. Y ) ) ) = ( ( R gsum ( k e. A |-> X ) ) .x. Y ) ) |