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| Description: Equality theorem for ordered pairs. |
| Ref | Expression |
|---|---|
| opeq2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | preq2 2501 |
. . 3
| |
| 2 | preq2 2501 |
. . 3
| |
| 3 | 1, 2 | syl 10 |
. 2
|
| 4 | df-op 2468 |
. 2
| |
| 5 | df-op 2468 |
. 2
| |
| 6 | 3, 4, 5 | 3eqtr4g 1578 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: opeq12 2543 opeq2i 2545 opeq2d 2548 breq2 2678 cbvopab2v 2732 opthg 2844 opthgg 2845 eqvinop 2847 moop2 2857 opabid 2866 dfid3 2892 opelxpg 3273 opabid2 3324 opelcog 3347 dfdmf 3363 opeldm 3371 dfrnf 3405 elrn2 3406 opelresg 3431 iss 3454 elimasng 3484 intirr 3498 cnvopab 3502 elxp4 3510 elxp5 3511 funopg 3604 fnopabg 3672 fcoi2 3703 tz6.12f 3795 funopfvg 3809 funfvop 3860 fsn 3891 tfrlem11 3979 opreq2 4027 op2ndg 4146 2ndconst 4155 mapsnen 4490 xpsnen 4498 xpassen 4504 aceq3lem 4794 elreal 5315 seq1val 6571 dfseq0 6652 vcoprne 8282 isnvlem 8313 nvi 8317 ref3w 10566 isded 10751 dedi 10752 cmppfd 10760 iscat 10769 cati 10770 iepiclem 10833 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1003 ax-gen 1004 ax-8 1005 ax-10 1007 ax-12 1009 ax-17 1012 ax-4 1014 ax-5o 1016 ax-6o 1019 ax-9o 1164 ax-10o 1182 ax-16 1252 ax-11o 1260 ax-ext 1504 |
| This theorem depends on definitions: df-bi 154 df-or 231 df-an 232 df-ex 1022 df-sb 1214 df-clab 1510 df-cleq 1515 df-clel 1518 df-v 1859 df-un 2101 df-sn 2464 df-pr 2465 df-op 2468 |