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| Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-inf2vnlem2 | Unicode version | ||
| Description: Lemma for bj-inf2vnlem3 10767 and bj-inf2vnlem4 10768. Remark: unoptimized proof (have to use more deduction style). (Contributed by BJ, 8-Dec-2019.) (Proof modification is discouraged.) |
| Ref | Expression |
|---|---|
| bj-inf2vnlem2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1 2087 |
. . . . . . 7
| |
| 2 | eqeq1 2087 |
. . . . . . . 8
| |
| 3 | 2 | rexbidv 2369 |
. . . . . . 7
|
| 4 | 1, 3 | orbi12d 739 |
. . . . . 6
|
| 5 | 4 | rspcv 2697 |
. . . . 5
|
| 6 | df-bj-ind 10722 |
. . . . . . . . 9
| |
| 7 | 6 | simplbi 268 |
. . . . . . . 8
|
| 8 | eleq1 2141 |
. . . . . . . 8
| |
| 9 | 7, 8 | syl5ibr 154 |
. . . . . . 7
|
| 10 | 9 | a1dd 47 |
. . . . . 6
|
| 11 | vex 2604 |
. . . . . . . . . 10
| |
| 12 | 11 | sucid 4172 |
. . . . . . . . 9
|
| 13 | eleq2 2142 |
. . . . . . . . . 10
| |
| 14 | 13 | eqcoms 2084 |
. . . . . . . . 9
|
| 15 | 12, 14 | mpbii 146 |
. . . . . . . 8
|
| 16 | eleq1 2141 |
. . . . . . . . . . . . 13
| |
| 17 | eleq1 2141 |
. . . . . . . . . . . . 13
| |
| 18 | 16, 17 | imbi12d 232 |
. . . . . . . . . . . 12
|
| 19 | 18 | rspcv 2697 |
. . . . . . . . . . 11
|
| 20 | bj-indsuc 10723 |
. . . . . . . . . . . 12
| |
| 21 | eleq1a 2150 |
. . . . . . . . . . . 12
| |
| 22 | 20, 21 | syl6com 35 |
. . . . . . . . . . 11
|
| 23 | 19, 22 | syl8 70 |
. . . . . . . . . 10
|
| 24 | 23 | com13 79 |
. . . . . . . . 9
|
| 25 | 24 | com25 90 |
. . . . . . . 8
|
| 26 | 15, 25 | mpdi 42 |
. . . . . . 7
|
| 27 | 26 | rexlimiv 2471 |
. . . . . 6
|
| 28 | 10, 27 | jaoi 668 |
. . . . 5
|
| 29 | 5, 28 | syl6 33 |
. . . 4
|
| 30 | 29 | com3l 80 |
. . 3
|
| 31 | 30 | alrimdv 1797 |
. 2
|
| 32 | bi2.04 246 |
. . 3
| |
| 33 | 32 | albii 1399 |
. 2
|
| 34 | 31, 33 | syl6ib 159 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
| This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-un 2977 df-sn 3404 df-suc 4126 df-bj-ind 10722 |
| This theorem is referenced by: bj-inf2vnlem3 10767 bj-inf2vnlem4 10768 |
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