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Mirrors > Home > ILE Home > Th. List > enssdom | Unicode version |
Description: Equinumerosity implies dominance. (Contributed by NM, 31-Mar-1998.) |
Ref | Expression |
---|---|
enssdom |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relen 6248 | . 2 | |
2 | f1of1 5145 | . . . . 5 | |
3 | 2 | eximi 1531 | . . . 4 |
4 | opabid 4012 | . . . 4 | |
5 | opabid 4012 | . . . 4 | |
6 | 3, 4, 5 | 3imtr4i 199 | . . 3 |
7 | df-en 6245 | . . . 4 | |
8 | 7 | eleq2i 2145 | . . 3 |
9 | df-dom 6246 | . . . 4 | |
10 | 9 | eleq2i 2145 | . . 3 |
11 | 6, 8, 10 | 3imtr4i 199 | . 2 |
12 | 1, 11 | relssi 4449 | 1 |
Colors of variables: wff set class |
Syntax hints: wex 1421 wcel 1433 wss 2973 cop 3401 copab 3838 wf1 4919 wf1o 4921 cen 6242 cdom 6243 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-opab 3840 df-xp 4369 df-rel 4370 df-f1o 4929 df-en 6245 df-dom 6246 |
This theorem is referenced by: endom 6266 |
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