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| Description: A property of an ordered pair of proper classes (due to our particular definition of ordered pair). |
| Ref | Expression |
|---|---|
| opprc1b |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opprc1 3170 |
. . 3
| |
| 2 | 0ex 3446 |
. . . 4
| |
| 3 | 2 | prid1 3106 |
. . 3
|
| 4 | 1, 3 | syl5eleqr 1978 |
. 2
|
| 5 | opeq1 3158 |
. . . . . 6
| |
| 6 | 5 | eleq2d 1964 |
. . . . 5
|
| 7 | 6 | notbid 673 |
. . . 4
|
| 8 | visset 2295 |
. . . . . . . . 9
| |
| 9 | 8 | snnz 3119 |
. . . . . . . 8
|
| 10 | df-ne 2019 |
. . . . . . . 8
| |
| 11 | 9, 10 | mpbi 206 |
. . . . . . 7
|
| 12 | eqcom 1886 |
. . . . . . 7
| |
| 13 | 11, 12 | mtbi 208 |
. . . . . 6
|
| 14 | 8 | prnz 3120 |
. . . . . . . 8
|
| 15 | df-ne 2019 |
. . . . . . . 8
| |
| 16 | 14, 15 | mpbi 206 |
. . . . . . 7
|
| 17 | eqcom 1886 |
. . . . . . 7
| |
| 18 | 16, 17 | mtbi 208 |
. . . . . 6
|
| 19 | 13, 18 | pm3.2ni 640 |
. . . . 5
|
| 20 | 2 | elop 3528 |
. . . . 5
|
| 21 | 19, 20 | mtbir 209 |
. . . 4
|
| 22 | 7, 21 | vtoclg 2346 |
. . 3
|
| 23 | 22 | con2i 113 |
. 2
|
| 24 | 4, 23 | impbii 174 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: opprc3 3543 opeqex 3544 opth2 3546 0nelelxp 4067 onxpdisjOLD 4069 dmsnopOLD 4368 funopg 4454 |
| 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-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-nul 3445 |
| 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-v 2294 df-dif 2597 df-un 2600 df-nul 2876 df-sn 3049 df-pr 3050 df-op 3053 |