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| Description: Expression for double union that moves union into a class builder. (Contributed by FL, 28-May-2007.) |
| Ref | Expression |
|---|---|
| uniuni |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluni 3180 |
. . . . . 6
| |
| 2 | 1 | anbi2i 538 |
. . . . 5
|
| 3 | 2 | exbii 1398 |
. . . 4
|
| 4 | 19.42v 1688 |
. . . . . . . 8
| |
| 5 | 4 | bicomi 189 |
. . . . . . 7
|
| 6 | 5 | exbii 1398 |
. . . . . 6
|
| 7 | excom 1393 |
. . . . . . 7
| |
| 8 | anass 487 |
. . . . . . . . 9
| |
| 9 | ancom 482 |
. . . . . . . . 9
| |
| 10 | 8, 9 | bitr3i 192 |
. . . . . . . 8
|
| 11 | 10 | 2exbii 1399 |
. . . . . . 7
|
| 12 | 7, 11 | bitri 190 |
. . . . . 6
|
| 13 | exdistr 1689 |
. . . . . 6
| |
| 14 | 6, 12, 13 | 3bitri 194 |
. . . . 5
|
| 15 | eluni 3180 |
. . . . . . . 8
| |
| 16 | 15 | bicomi 189 |
. . . . . . 7
|
| 17 | 16 | anbi2i 538 |
. . . . . 6
|
| 18 | 17 | exbii 1398 |
. . . . 5
|
| 19 | 14, 18 | bitri 190 |
. . . 4
|
| 20 | visset 2295 |
. . . . . . . . . . . 12
| |
| 21 | 20 | uniex 3794 |
. . . . . . . . . . 11
|
| 22 | eleq2 1958 |
. . . . . . . . . . 11
| |
| 23 | 21, 22 | ceqsexv 2325 |
. . . . . . . . . 10
|
| 24 | exancom 1401 |
. . . . . . . . . 10
| |
| 25 | 23, 24 | bitr3i 192 |
. . . . . . . . 9
|
| 26 | 25 | anbi2i 538 |
. . . . . . . 8
|
| 27 | 19.42v 1688 |
. . . . . . . 8
| |
| 28 | ancom 482 |
. . . . . . . . . 10
| |
| 29 | anass 487 |
. . . . . . . . . 10
| |
| 30 | 28, 29 | bitri 190 |
. . . . . . . . 9
|
| 31 | 30 | exbii 1398 |
. . . . . . . 8
|
| 32 | 26, 27, 31 | 3bitr2i 196 |
. . . . . . 7
|
| 33 | 32 | exbii 1398 |
. . . . . 6
|
| 34 | excom 1393 |
. . . . . 6
| |
| 35 | 33, 34 | bitri 190 |
. . . . 5
|
| 36 | exdistr 1689 |
. . . . 5
| |
| 37 | visset 2295 |
. . . . . . . . 9
| |
| 38 | eqeq1 1890 |
. . . . . . . . . . 11
| |
| 39 | 38 | anbi1d 679 |
. . . . . . . . . 10
|
| 40 | 39 | exbidv 1657 |
. . . . . . . . 9
|
| 41 | 37, 40 | elab 2403 |
. . . . . . . 8
|
| 42 | 41 | bicomi 189 |
. . . . . . 7
|
| 43 | 42 | anbi2i 538 |
. . . . . 6
|
| 44 | 43 | exbii 1398 |
. . . . 5
|
| 45 | 35, 36, 44 | 3bitri 194 |
. . . 4
|
| 46 | 3, 19, 45 | 3bitri 194 |
. . 3
|
| 47 | 46 | abbii 2006 |
. 2
|
| 48 | df-uni 3178 |
. 2
| |
| 49 | df-uni 3178 |
. 2
| |
| 50 | 47, 48, 49 | 3eqtr4i 1921 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: qusp 14908 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-clab 1872 df-cleq 1877 df-clel 1880 df-rex 2110 df-v 2294 df-uni 3178 |