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Mirrors > Home > ILE Home > Th. List > unipr | Unicode version |
Description: The union of a pair is the union of its members. Proposition 5.7 of [TakeutiZaring] p. 16. (Contributed by NM, 23-Aug-1993.) |
Ref | Expression |
---|---|
unipr.1 | |
unipr.2 |
Ref | Expression |
---|---|
unipr |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.43 1607 | . . . 4 | |
2 | vex 2689 | . . . . . . . 8 | |
3 | 2 | elpr 3548 | . . . . . . 7 |
4 | 3 | anbi2i 452 | . . . . . 6 |
5 | andi 807 | . . . . . 6 | |
6 | 4, 5 | bitri 183 | . . . . 5 |
7 | 6 | exbii 1584 | . . . 4 |
8 | unipr.1 | . . . . . . 7 | |
9 | 8 | clel3 2820 | . . . . . 6 |
10 | exancom 1587 | . . . . . 6 | |
11 | 9, 10 | bitri 183 | . . . . 5 |
12 | unipr.2 | . . . . . . 7 | |
13 | 12 | clel3 2820 | . . . . . 6 |
14 | exancom 1587 | . . . . . 6 | |
15 | 13, 14 | bitri 183 | . . . . 5 |
16 | 11, 15 | orbi12i 753 | . . . 4 |
17 | 1, 7, 16 | 3bitr4ri 212 | . . 3 |
18 | 17 | abbii 2255 | . 2 |
19 | df-un 3075 | . 2 | |
20 | df-uni 3737 | . 2 | |
21 | 18, 19, 20 | 3eqtr4ri 2171 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 103 wo 697 wceq 1331 wex 1468 wcel 1480 cab 2125 cvv 2686 cun 3069 cpr 3528 cuni 3736 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 df-un 3075 df-sn 3533 df-pr 3534 df-uni 3737 |
This theorem is referenced by: uniprg 3751 unisn 3752 uniop 4177 unex 4362 bj-unex 13117 |
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