| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: An ordered pair contains its union. |
| Ref | Expression |
|---|---|
| elvvuni |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elvv 4053 |
. 2
| |
| 2 | uniop 3555 |
. . . . 5
| |
| 3 | opi2 3530 |
. . . . 5
| |
| 4 | 2, 3 | eqeltri 1967 |
. . . 4
|
| 5 | unieq 3185 |
. . . . 5
| |
| 6 | id 73 |
. . . . 5
| |
| 7 | 5, 6 | eleq12d 1965 |
. . . 4
|
| 8 | 4, 7 | mpbiri 211 |
. . 3
|
| 9 | 8 | 19.23aivv 1675 |
. 2
|
| 10 | 1, 9 | sylbi 216 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: unielxp 5047 |
| 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-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-nul 3445 ax-pow 3481 ax-pr 3524 |
| 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-ne 2019 df-rex 2110 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-opab 3396 df-xp 4000 |