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Related theorems Unicode version |
| Description: Equinumerosity is a relation. |
| Ref | Expression |
|---|---|
| relen |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relopab 3262 |
. 2
| |
| 2 | df-en 4360 |
. . 3
| |
| 3 | 2 | releqi 3240 |
. 2
|
| 4 | 1, 3 | mpbir 190 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: breng 4366 enssdom 4373 ensymg 4401 entrt 4404 unen 4423 sbthcl 4448 sdomen2 4471 pwen 4492 php3 4504 domfi 4525 unifi 4541 fodomfi 4549 fodomfib 4550 iunfi 4552 pwfi 4554 card1 4816 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-sep 2699 ax-pow 2738 ax-pr 2775 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-v 1809 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-opab 2663 df-xp 3180 df-rel 3181 df-en 4360 |