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Mirrors > Home > ILE Home > Th. List > encv | Unicode version |
Description: If two classes are equinumerous, both classes are sets. (Contributed by AV, 21-Mar-2019.) |
Ref | Expression |
---|---|
encv |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relen 6638 | . 2 | |
2 | brrelex12 4577 | . 2 | |
3 | 1, 2 | mpan 420 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wcel 1480 cvv 2686 class class class wbr 3929 wrel 4544 cen 6632 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-br 3930 df-opab 3990 df-xp 4545 df-rel 4546 df-en 6635 |
This theorem is referenced by: bren 6641 en1uniel 6698 cardcl 7037 isnumi 7038 cardval3ex 7041 djuen 7067 ccfunen 7079 |
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