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Mirrors > Home > MPE Home > Th. List > enssdom | Structured version Visualization version Unicode version |
Description: Equinumerosity implies dominance. (Contributed by NM, 31-Mar-1998.) |
Ref | Expression |
---|---|
enssdom |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relen 7960 | . 2 | |
2 | f1of1 6136 | . . . . 5 | |
3 | 2 | eximi 1762 | . . . 4 |
4 | opabid 4982 | . . . 4 | |
5 | opabid 4982 | . . . 4 | |
6 | 3, 4, 5 | 3imtr4i 281 | . . 3 |
7 | df-en 7956 | . . . 4 | |
8 | 7 | eleq2i 2693 | . . 3 |
9 | df-dom 7957 | . . . 4 | |
10 | 9 | eleq2i 2693 | . . 3 |
11 | 6, 8, 10 | 3imtr4i 281 | . 2 |
12 | 1, 11 | relssi 5211 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wex 1704 wcel 1990 wss 3574 cop 4183 copab 4712 wf1 5885 wf1o 5887 cen 7952 cdom 7953 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-opab 4713 df-xp 5120 df-rel 5121 df-f1o 5895 df-en 7956 df-dom 7957 |
This theorem is referenced by: dfdom2 7981 endom 7982 |
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