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| Description: The sum of two finite sums. |
| Ref | Expression |
|---|---|
| fsumadd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opreq2 3954 |
. . . . 5
| |
| 2 | 1 | raleq1d 1781 |
. . . 4
|
| 3 | 1 | sumeq1d 6928 |
. . . . 5
|
| 4 | 1 | sumeq1d 6928 |
. . . . . 6
|
| 5 | 1 | sumeq1d 6928 |
. . . . . 6
|
| 6 | 4, 5 | opreq12d 3963 |
. . . . 5
|
| 7 | 3, 6 | eqeq12d 1481 |
. . . 4
|
| 8 | 2, 7 | imbi12d 624 |
. . 3
|
| 9 | opreq2 3954 |
. . . . 5
| |
| 10 | 9 | raleq1d 1781 |
. . . 4
|
| 11 | 9 | sumeq1d 6928 |
. . . . 5
|
| 12 | 9 | sumeq1d 6928 |
. . . . . 6
|
| 13 | 9 | sumeq1d 6928 |
. . . . . 6
|
| 14 | 12, 13 | opreq12d 3963 |
. . . . 5
|
| 15 | 11, 14 | eqeq12d 1481 |
. . . 4
|
| 16 | 10, 15 | imbi12d 624 |
. . 3
|
| 17 | opreq2 3954 |
. . . . 5
| |
| 18 | 17 | raleq1d 1781 |
. . . 4
|
| 19 | 17 | sumeq1d 6928 |
. . . . 5
|
| 20 | 17 | sumeq1d 6928 |
. . . . . 6
|
| 21 | 17 | sumeq1d 6928 |
. . . . . 6
|
| 22 | 20, 21 | opreq12d 3963 |
. . . . 5
|
| 23 | 19, 22 | eqeq12d 1481 |
. . . 4
|
| 24 | 18, 23 | imbi12d 624 |
. . 3
|
| 25 | opreq2 3954 |
. . . . 5
| |
| 26 | 25 | raleq1d 1781 |
. . . 4
|
| 27 | 25 | sumeq1d 6928 |
. . . . 5
|
| 28 | 25 | sumeq1d 6928 |
. . . . . 6
|
| 29 | 25 | sumeq1d 6928 |
. . . . . 6
|
| 30 | 28, 29 | opreq12d 3963 |
. . . . 5
|
| 31 | 27, 30 | eqeq12d 1481 |
. . . 4
|
| 32 | 26, 31 | imbi12d 624 |
. . 3
|
| 33 | csbopr12g 3972 |
. . . . . 6
| |
| 34 | 33 | adantr 389 |
. . . . 5
|
| 35 | fsum1s 6947 |
. . . . . 6
| |
| 36 | axaddcl 5243 |
. . . . . . 7
| |
| 37 | 36 | r19.20si 1698 |
. . . . . 6
|
| 38 | 35, 37 | sylan2 451 |
. . . . 5
|
| 39 | fsum1s 6947 |
. . . . . . 7
| |
| 40 | pm3.26 319 |
. . . . . . . 8
| |
| 41 | 40 | r19.20si 1698 |
. . . . . . 7
|
| 42 | 39, 41 | sylan2 451 |
. . . . . 6
|