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Related theorems Unicode version |
| Description: Equinumerosity is a relation. |
| Ref | Expression |
|---|---|
| relen |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relopab 3266 |
. 2
| |
| 2 | df-en 4368 |
. . 3
| |
| 3 | 2 | releqi 3244 |
. 2
|
| 4 | 1, 3 | mpbir 190 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: breng 4375 isfi 4382 enssdom 4383 ensymg 4411 entrt 4414 unen 4434 sbthcl 4459 sdomen2 4482 pwen 4503 php3 4515 php3OLD 4516 domfiOLD 4539 unifiOLD 4557 fodomfiOLD 4566 fodomfibOLD 4567 iunfiOLD 4569 pwfiOLD 4571 card1 4833 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2703 ax-pow 2742 ax-pr 2779 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-opab 2667 df-xp 3184 df-rel 3185 df-en 4368 |