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| Description: An ordered pair of classes is a set. Exercise 7 of [TakeutiZaring] p. 16. |
| Ref | Expression |
|---|---|
| opex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-op 3053 |
. 2
| |
| 2 | prex 3526 |
. 2
| |
| 3 | 1, 2 | eqeltri 1967 |
1
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| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: otthg 3535 oteqex 3545 euop2 3553 opabid 3557 opabidOLD 3558 elopab 3559 ssopab2 3573 opabn0 3575 elvvv 4054 opbrop 4064 intirr 4312 xpnz 4335 dmsnn0 4362 dmsnop 4367 dmsnopOLD 4368 cnvsn 4373 opswap 4374 op2ndb 4376 unixp0 4423 funopg 4454 funsn 4463 funsnOLD 4464 iunfopabOLD 4543 dffv2 4734 fvsn 4758 fvpr1 4759 fvpr2 4760 fvtp1 4761 fvtp2 4762 fvtp3 4763 fsn 4807 dfoprab2 4917 rnoprab 4933 eloprabg 4936 fo1st 5032 fo2nd 5033 fparlem1 5081 fparlem2 5082 fparlem3 5083 fparlem4 5084 fpar 5085 tfrlem11 5129 brecop 5365 brecop2 5366 ecopoprdm 5368 eceqopreq 5372 th3qlem2 5374 xpsnen 5494 xpcomen 5498 xpassen 5500 ac6sfilem3 5508 xpmapenlem4 5593 xpmapenlem5 5594 hartog 5693 enqeceq 6199 addpipq 6206 mulpipq 6207 distrpqlem 6218 enreceq 6329 addsrpr 6336 mulsrpr 6337 addcnsr 6405 mulcnsr 6406 ltresr 6410 supre 6412 addcnsrec 6415 mulcnsrec 6416 axrnegex 6436 axrrecex 6437 axcnre 6439 ltxr 6664 seq1lem1 7722 seq1rval 7724 seq11lem 7728 seqzfval 7780 ruclem6 8784 ruclem7 8785 ruclem8 8786 ruclem15 8793 xplmi 9251 xplm 9253 xpcn 9254 oprcn 9255 grpsn 9340 ssga 9455 gapmlem 9461 gapm 9462 ringsn 9490 nvvcop 9545 nvex 9562 nvoprne 9638 cnnvg 9640 cnnvs 9643 cnnvnm 9644 abscn 9682 oprabopabf 10157 upxp 10225 uptx 10226 txcnopab 10228 on1el3 10412 on1el4 10413 zrdivrng 10418 h2hva 10475 h2hsm 10476 h2hnm 10477 hhssva 10762 hhsssm 10763 hhssnm 10764 hhshsslem1 10770 hhsssh2 10773 bnj97 13220 bnj547 13273 bnj966 13348 bnj1442 13540 ghomsn 13631 eucalgval 13749 eucalgf 13751 brtp 13830 xporderlem 13948 frxp 13951 wfrlem14 13970 brv 14063 brtxp 14067 brsset 14069 brbigcup 14074 elo 14342 stcat 14347 eloi 14400 cbcpcp 14504 idtrgrp 14978 invtrgrp 14979 extopgrp 14980 1alg 15069 1ded 15085 1cat 15106 hartogOLD 15384 filnetlem1 15640 filnetlem3 15642 filnetlem5 15644 filnet 15645 prfunOLD 15677 prfv1OLD 15678 prfv2OLD 15679 prfOLD 15680 |
| 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-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 |