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| Description: The first argument of a binary relation exists. (An artifact of our ordered pair definition.) |
| Ref | Expression |
|---|---|
| brrelexi.1 |
|
| Ref | Expression |
|---|---|
| brrelexi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brrelexi.1 |
. 2
| |
| 2 | brrelex 3197 |
. 2
| |
| 3 | 1, 2 | mpan 693 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: nprrel 3199 vtoclr 3201 vtoclrbr 3202 vtoclibr 3203 ideqg 3266 issetid 3269 oprprc1 3969 breng 4357 brdomg 4358 ensymg 4392 unen 4414 xpdom2 4422 xpdom1 4423 sbth 4437 domnsym 4443 ensdomtr 4451 sdomirr 4452 sdomex 4453 domsdomtr 4456 sdomen2 4462 fodomr 4463 pwen 4483 php3 4495 infsdomnn 4511 domfi 4516 unifi 4532 fodomfi 4540 fodomfib 4541 iunfi 4543 pwfi 4545 card1 4805 alephnbtwn2 4841 alephsucdom 4852 prcdpq 5069 climcl 6916 clmi1 7024 climaddc 7068 climmulc 7069 climabslem 7084 unctb 7519 eltopsp 7546 tpsex 7547 ismsg 7739 isring 8078 isvcgOLD 8133 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-br 2610 df-opab 2657 df-xp 3174 df-rel 3175 |