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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 6646 | . 2 | |
2 | f1of1 5374 | . . . . 5 | |
3 | 2 | eximi 1580 | . . . 4 |
4 | opabid 4187 | . . . 4 | |
5 | opabid 4187 | . . . 4 | |
6 | 3, 4, 5 | 3imtr4i 200 | . . 3 |
7 | df-en 6643 | . . . 4 | |
8 | 7 | eleq2i 2207 | . . 3 |
9 | df-dom 6644 | . . . 4 | |
10 | 9 | eleq2i 2207 | . . 3 |
11 | 6, 8, 10 | 3imtr4i 200 | . 2 |
12 | 1, 11 | relssi 4638 | 1 |
Colors of variables: wff set class |
Syntax hints: wex 1469 wcel 1481 wss 3076 cop 3535 copab 3996 wf1 5128 wf1o 5130 cen 6640 cdom 6641 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-rex 2423 df-v 2691 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-opab 3998 df-xp 4553 df-rel 4554 df-f1o 5138 df-en 6643 df-dom 6644 |
This theorem is referenced by: endom 6665 |
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