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| Description: Equality theorem for ordered pairs. |
| Ref | Expression |
|---|---|
| opeq2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | preq2 2445 |
. . 3
| |
| 2 | preq2 2445 |
. . 3
| |
| 3 | 1, 2 | syl 10 |
. 2
|
| 4 | df-op 2412 |
. 2
| |
| 5 | df-op 2412 |
. 2
| |
| 6 | 3, 4, 5 | 3eqtr4g 1528 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: opeq12 2485 opeq2i 2487 opeq2d 2490 breq2 2618 cbvopab2v 2672 opthg 2783 opthgg 2784 eqvinop 2786 moop2 2796 opabid 2805 dfid3 2831 opelxpg 3211 opabid2 3262 opelcog 3285 dfdmf 3301 opeldm 3309 dfrnf 3342 elrn2 3343 opelresg 3366 iss 3389 elimasng 3419 intirr 3433 cnvopab 3437 elxp4 3445 elxp5 3446 funopg 3539 fnopabg 3607 fcoi2 3637 tz6.12f 3729 funopfvg 3743 funfvop 3794 fsn 3825 tfrlem11 3912 opreq2 3960 op2ndg 4078 2ndconst 4087 mapsnen 4416 xpsnen 4421 xpassen 4427 aceq3lem 4712 elreal 5230 seq1val 6257 dfseq0 6503 vcoprne 8150 isnvlem 8181 nvi 8185 isded 10549 dedi 10550 cmppfd 10558 iscat 10567 cati 10568 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-12 966 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 979 df-sb 1170 df-clab 1462 df-cleq 1467 df-clel 1470 df-v 1808 df-un 2046 df-sn 2408 df-pr 2409 df-op 2412 |