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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 6225 | . 2 | |
2 | brrelex12 4381 | . 2 | |
3 | 1, 2 | mpan 400 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 97 wcel 1393 cvv 2557 class class class wbr 3764 wrel 4350 cen 6219 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-br 3765 df-opab 3819 df-xp 4351 df-rel 4352 df-en 6222 |
This theorem is referenced by: bren 6228 en1uniel 6284 cardcl 6361 isnumi 6362 cardval3ex 6365 |
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