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Mirrors > Home > ILE Home > Th. List > f1oprg | Unicode version |
Description: An unordered pair of ordered pairs with different elements is a one-to-one onto function. (Contributed by Alexander van der Vekens, 14-Aug-2017.) |
Ref | Expression |
---|---|
f1oprg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1osng 5467 | . . . . 5 | |
2 | 1 | ad2antrr 480 | . . . 4 |
3 | f1osng 5467 | . . . . 5 | |
4 | 3 | ad2antlr 481 | . . . 4 |
5 | disjsn2 3633 | . . . . 5 | |
6 | 5 | ad2antrl 482 | . . . 4 |
7 | disjsn2 3633 | . . . . 5 | |
8 | 7 | ad2antll 483 | . . . 4 |
9 | f1oun 5446 | . . . 4 | |
10 | 2, 4, 6, 8, 9 | syl22anc 1228 | . . 3 |
11 | df-pr 3577 | . . . . . 6 | |
12 | 11 | eqcomi 2168 | . . . . 5 |
13 | 12 | a1i 9 | . . . 4 |
14 | df-pr 3577 | . . . . . 6 | |
15 | 14 | eqcomi 2168 | . . . . 5 |
16 | 15 | a1i 9 | . . . 4 |
17 | df-pr 3577 | . . . . . 6 | |
18 | 17 | eqcomi 2168 | . . . . 5 |
19 | 18 | a1i 9 | . . . 4 |
20 | 13, 16, 19 | f1oeq123d 5421 | . . 3 |
21 | 10, 20 | mpbid 146 | . 2 |
22 | 21 | ex 114 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1342 wcel 2135 wne 2334 cun 3109 cin 3110 c0 3404 csn 3570 cpr 3571 cop 3573 wf1o 5181 |
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 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-ral 2447 df-rex 2448 df-v 2723 df-dif 3113 df-un 3115 df-in 3117 df-ss 3124 df-nul 3405 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-br 3977 df-opab 4038 df-id 4265 df-xp 4604 df-rel 4605 df-cnv 4606 df-co 4607 df-dm 4608 df-rn 4609 df-fun 5184 df-fn 5185 df-f 5186 df-f1 5187 df-fo 5188 df-f1o 5189 |
This theorem is referenced by: (None) |
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