Step |
Hyp |
Ref |
Expression |
1 |
|
smat.s |
|- S = ( K ( subMat1 ` A ) L ) |
2 |
|
smat.m |
|- ( ph -> M e. NN ) |
3 |
|
smat.n |
|- ( ph -> N e. NN ) |
4 |
|
smat.k |
|- ( ph -> K e. ( 1 ... M ) ) |
5 |
|
smat.l |
|- ( ph -> L e. ( 1 ... N ) ) |
6 |
|
smat.a |
|- ( ph -> A e. ( B ^m ( ( 1 ... M ) X. ( 1 ... N ) ) ) ) |
7 |
|
smattl.i |
|- ( ph -> I e. ( 1 ..^ K ) ) |
8 |
|
smattl.j |
|- ( ph -> J e. ( 1 ..^ L ) ) |
9 |
|
fzossnn |
|- ( 1 ..^ K ) C_ NN |
10 |
9 7
|
sseldi |
|- ( ph -> I e. NN ) |
11 |
|
fzossnn |
|- ( 1 ..^ L ) C_ NN |
12 |
11 8
|
sseldi |
|- ( ph -> J e. NN ) |
13 |
|
elfzolt2 |
|- ( I e. ( 1 ..^ K ) -> I < K ) |
14 |
7 13
|
syl |
|- ( ph -> I < K ) |
15 |
14
|
iftrued |
|- ( ph -> if ( I < K , I , ( I + 1 ) ) = I ) |
16 |
|
elfzolt2 |
|- ( J e. ( 1 ..^ L ) -> J < L ) |
17 |
8 16
|
syl |
|- ( ph -> J < L ) |
18 |
17
|
iftrued |
|- ( ph -> if ( J < L , J , ( J + 1 ) ) = J ) |
19 |
1 2 3 4 5 6 10 12 15 18
|
smatlem |
|- ( ph -> ( I S J ) = ( I A J ) ) |