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Mirrors > Home > ILE Home > Th. List > elvvuni | Unicode version |
Description: An ordered pair contains its union. (Contributed by NM, 16-Sep-2006.) |
Ref | Expression |
---|---|
elvvuni |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elvv 4402 | . 2 | |
2 | vex 2560 | . . . . . 6 | |
3 | vex 2560 | . . . . . 6 | |
4 | 2, 3 | uniop 3992 | . . . . 5 |
5 | 2, 3 | opi2 3970 | . . . . 5 |
6 | 4, 5 | eqeltri 2110 | . . . 4 |
7 | unieq 3589 | . . . . 5 | |
8 | id 19 | . . . . 5 | |
9 | 7, 8 | eleq12d 2108 | . . . 4 |
10 | 6, 9 | mpbiri 157 | . . 3 |
11 | 10 | exlimivv 1776 | . 2 |
12 | 1, 11 | sylbi 114 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1243 wex 1381 wcel 1393 cvv 2557 cpr 3376 cop 3378 cuni 3580 cxp 4343 |
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-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-rex 2312 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-opab 3819 df-xp 4351 |
This theorem is referenced by: unielxp 5800 |
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