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Mirrors > Home > ILE Home > Th. List > rabun2 | Unicode version |
Description: Abstraction restricted to a union. (Contributed by Stefan O'Rear, 5-Feb-2015.) |
Ref | Expression |
---|---|
rabun2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rab 2357 | . 2 | |
2 | df-rab 2357 | . . . 4 | |
3 | df-rab 2357 | . . . 4 | |
4 | 2, 3 | uneq12i 3124 | . . 3 |
5 | elun 3113 | . . . . . . 7 | |
6 | 5 | anbi1i 445 | . . . . . 6 |
7 | andir 765 | . . . . . 6 | |
8 | 6, 7 | bitri 182 | . . . . 5 |
9 | 8 | abbii 2194 | . . . 4 |
10 | unab 3231 | . . . 4 | |
11 | 9, 10 | eqtr4i 2104 | . . 3 |
12 | 4, 11 | eqtr4i 2104 | . 2 |
13 | 1, 12 | eqtr4i 2104 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 102 wo 661 wceq 1284 wcel 1433 cab 2067 crab 2352 cun 2971 |
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-rab 2357 df-v 2603 df-un 2977 |
This theorem is referenced by: (None) |
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