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| Mirrors > Home > NFE Home > Th. List > eqop | Unicode version | ||
| Description: Express equality to an ordered pair. (Contributed by SF, 6-Jan-2015.) | 
| Ref | Expression | 
|---|---|
| eqop | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | dfcleq 2347 | 
. 2
 | |
| 2 | df-op 4567 | 
. . . . . . 7
 | |
| 3 | 2 | eleq2i 2417 | 
. . . . . 6
 | 
| 4 | elun 3221 | 
. . . . . 6
 | |
| 5 | 3, 4 | bitri 240 | 
. . . . 5
 | 
| 6 | abid 2341 | 
. . . . . 6
 | |
| 7 | abid 2341 | 
. . . . . 6
 | |
| 8 | 6, 7 | orbi12i 507 | 
. . . . 5
 | 
| 9 | 5, 8 | bitri 240 | 
. . . 4
 | 
| 10 | 9 | bibi2i 304 | 
. . 3
 | 
| 11 | 10 | albii 1566 | 
. 2
 | 
| 12 | 1, 11 | bitri 240 | 
1
 | 
| Colors of variables: wff setvar class | 
| Syntax hints:     | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 | 
| This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2479 df-v 2862 df-nin 3212 df-compl 3213 df-un 3215 df-op 4567 | 
| This theorem is referenced by: setconslem3 4734 setconslem7 4738 | 
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