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Mirrors > Home > ILE Home > Th. List > enm | Unicode version |
Description: A set equinumerous to an inhabited set is inhabited. (Contributed by Jim Kingdon, 19-May-2020.) |
Ref | Expression |
---|---|
enm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bren 6609 | . . . . 5 | |
2 | f1of 5335 | . . . . . . 7 | |
3 | ffvelrn 5521 | . . . . . . . . 9 | |
4 | elex2 2676 | . . . . . . . . 9 | |
5 | 3, 4 | syl 14 | . . . . . . . 8 |
6 | 5 | ex 114 | . . . . . . 7 |
7 | 2, 6 | syl 14 | . . . . . 6 |
8 | 7 | exlimiv 1562 | . . . . 5 |
9 | 1, 8 | sylbi 120 | . . . 4 |
10 | 9 | com12 30 | . . 3 |
11 | 10 | exlimiv 1562 | . 2 |
12 | 11 | impcom 124 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wex 1453 wcel 1465 class class class wbr 3899 wf 5089 wf1o 5092 cfv 5093 cen 6600 |
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 683 ax-5 1408 ax-7 1409 ax-gen 1410 ax-ie1 1454 ax-ie2 1455 ax-8 1467 ax-10 1468 ax-11 1469 ax-i12 1470 ax-bndl 1471 ax-4 1472 ax-13 1476 ax-14 1477 ax-17 1491 ax-i9 1495 ax-ial 1499 ax-i5r 1500 ax-ext 2099 ax-sep 4016 ax-pow 4068 ax-pr 4101 ax-un 4325 |
This theorem depends on definitions: df-bi 116 df-3an 949 df-tru 1319 df-nf 1422 df-sb 1721 df-eu 1980 df-mo 1981 df-clab 2104 df-cleq 2110 df-clel 2113 df-nfc 2247 df-ral 2398 df-rex 2399 df-v 2662 df-sbc 2883 df-un 3045 df-in 3047 df-ss 3054 df-pw 3482 df-sn 3503 df-pr 3504 df-op 3506 df-uni 3707 df-br 3900 df-opab 3960 df-id 4185 df-xp 4515 df-rel 4516 df-cnv 4517 df-co 4518 df-dm 4519 df-rn 4520 df-iota 5058 df-fun 5095 df-fn 5096 df-f 5097 df-f1 5098 df-fo 5099 df-f1o 5100 df-fv 5101 df-en 6603 |
This theorem is referenced by: ssfilem 6737 diffitest 6749 |
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