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Mirrors > Home > ILE Home > Th. List > 1domsn | Unicode version |
Description: A singleton (whether of a set or a proper class) is dominated by one. (Contributed by Jim Kingdon, 1-Mar-2022.) |
Ref | Expression |
---|---|
1domsn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0lt1o 6330 | . . . 4 | |
2 | 1 | rgenw 2485 | . . 3 |
3 | elsni 3540 | . . . . . . 7 | |
4 | 3 | adantr 274 | . . . . . 6 |
5 | elsni 3540 | . . . . . . 7 | |
6 | 5 | adantl 275 | . . . . . 6 |
7 | 4, 6 | eqtr4d 2173 | . . . . 5 |
8 | 7 | a1d 22 | . . . 4 |
9 | 8 | rgen2a 2484 | . . 3 |
10 | eqid 2137 | . . . 4 | |
11 | eqidd 2138 | . . . 4 | |
12 | 10, 11 | f1mpt 5665 | . . 3 |
13 | 2, 9, 12 | mpbir2an 926 | . 2 |
14 | 1oex 6314 | . . 3 | |
15 | 14 | f1dom 6647 | . 2 |
16 | 13, 15 | ax-mp 5 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1331 wcel 1480 wral 2414 c0 3358 csn 3522 class class class wbr 3924 cmpt 3984 wf1 5115 c1o 6299 cdom 6626 |
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-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-coll 4038 ax-sep 4041 ax-nul 4049 ax-pow 4093 ax-pr 4126 ax-un 4350 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ral 2419 df-rex 2420 df-reu 2421 df-rab 2423 df-v 2683 df-sbc 2905 df-csb 2999 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-nul 3359 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-iun 3810 df-br 3925 df-opab 3985 df-mpt 3986 df-tr 4022 df-id 4210 df-iord 4283 df-on 4285 df-suc 4288 df-xp 4540 df-rel 4541 df-cnv 4542 df-co 4543 df-dm 4544 df-rn 4545 df-res 4546 df-ima 4547 df-iota 5083 df-fun 5120 df-fn 5121 df-f 5122 df-f1 5123 df-fo 5124 df-f1o 5125 df-fv 5126 df-1o 6306 df-dom 6629 |
This theorem is referenced by: (None) |
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