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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 1519 | . . . 4 | |
2 | vex 2560 | . . . . . . . 8 | |
3 | 2 | elpr 3396 | . . . . . . 7 |
4 | 3 | anbi2i 430 | . . . . . 6 |
5 | andi 731 | . . . . . 6 | |
6 | 4, 5 | bitri 173 | . . . . 5 |
7 | 6 | exbii 1496 | . . . 4 |
8 | unipr.1 | . . . . . . 7 | |
9 | 8 | clel3 2679 | . . . . . 6 |
10 | exancom 1499 | . . . . . 6 | |
11 | 9, 10 | bitri 173 | . . . . 5 |
12 | unipr.2 | . . . . . . 7 | |
13 | 12 | clel3 2679 | . . . . . 6 |
14 | exancom 1499 | . . . . . 6 | |
15 | 13, 14 | bitri 173 | . . . . 5 |
16 | 11, 15 | orbi12i 681 | . . . 4 |
17 | 1, 7, 16 | 3bitr4ri 202 | . . 3 |
18 | 17 | abbii 2153 | . 2 |
19 | df-un 2922 | . 2 | |
20 | df-uni 3581 | . 2 | |
21 | 18, 19, 20 | 3eqtr4ri 2071 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 97 wo 629 wceq 1243 wex 1381 wcel 1393 cab 2026 cvv 2557 cun 2915 cpr 3376 cuni 3580 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 |
This theorem depends on definitions: df-bi 110 df-tru 1246 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-v 2559 df-un 2922 df-sn 3381 df-pr 3382 df-uni 3581 |
This theorem is referenced by: uniprg 3595 unisn 3596 uniop 3992 unex 4176 bj-unex 10039 |
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