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Related theorems Unicode version |
| Description: Equinumerosity implies dominance. |
| Ref | Expression |
|---|---|
| enssdom |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relen 4372 |
. 2
| |
| 2 | f1of1 3688 |
. . . . 5
| |
| 3 | 2 | 19.22i 1040 |
. . . 4
|
| 4 | opabid 2810 |
. . . 4
| |
| 5 | opabid 2810 |
. . . 4
| |
| 6 | 3, 4, 5 | 3imtr4 219 |
. . 3
|
| 7 | df-en 4368 |
. . . 4
| |
| 8 | 7 | eleq2i 1538 |
. . 3
|
| 9 | df-dom 4369 |
. . . 4
| |
| 10 | 9 | eleq2i 1538 |
. . 3
|
| 11 | 6, 8, 10 | 3imtr4 219 |
. 2
|
| 12 | 1, 11 | relssi 3248 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: dfdom2 4384 endom 4385 |
| 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-9 965 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-f1o 3197 df-en 4368 df-dom 4369 |