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Mirrors > Home > ILE Home > Th. List > eldju | Unicode version |
Description: Element of a disjoint union. (Contributed by BJ and Jim Kingdon, 23-Jun-2022.) |
Ref | Expression |
---|---|
eldju | ⊔ inl inr |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | djuunr 6919 | . . . 4 inl inr ⊔ | |
2 | 1 | eqcomi 2121 | . . 3 ⊔ inl inr |
3 | 2 | eleq2i 2184 | . 2 ⊔ inl inr |
4 | elun 3187 | . . 3 inl inr inl inr | |
5 | djulf1or 6909 | . . . . . 6 inl | |
6 | f1ofn 5336 | . . . . . 6 inl inl | |
7 | fvelrnb 5437 | . . . . . 6 inl inl inl | |
8 | 5, 6, 7 | mp2b 8 | . . . . 5 inl inl |
9 | eqcom 2119 | . . . . . 6 inl inl | |
10 | 9 | rexbii 2419 | . . . . 5 inl inl |
11 | 8, 10 | bitri 183 | . . . 4 inl inl |
12 | djurf1or 6910 | . . . . . 6 inr | |
13 | f1ofn 5336 | . . . . . 6 inr inr | |
14 | fvelrnb 5437 | . . . . . 6 inr inr inr | |
15 | 12, 13, 14 | mp2b 8 | . . . . 5 inr inr |
16 | eqcom 2119 | . . . . . 6 inr inr | |
17 | 16 | rexbii 2419 | . . . . 5 inr inr |
18 | 15, 17 | bitri 183 | . . . 4 inr inr |
19 | 11, 18 | orbi12i 738 | . . 3 inl inr inl inr |
20 | 4, 19 | bitri 183 | . 2 inl inr inl inr |
21 | 3, 20 | bitri 183 | 1 ⊔ inl inr |
Colors of variables: wff set class |
Syntax hints: wb 104 wo 682 wceq 1316 wcel 1465 wrex 2394 cun 3039 c0 3333 csn 3497 cxp 4507 crn 4510 cres 4511 wfn 5088 wf1o 5092 cfv 5093 c1o 6274 ⊔ cdju 6890 inlcinl 6898 inrcinr 6899 |
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 588 ax-in2 589 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-nul 4024 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-dif 3043 df-un 3045 df-in 3047 df-ss 3054 df-nul 3334 df-pw 3482 df-sn 3503 df-pr 3504 df-op 3506 df-uni 3707 df-br 3900 df-opab 3960 df-mpt 3961 df-tr 3997 df-id 4185 df-iord 4258 df-on 4260 df-suc 4263 df-xp 4515 df-rel 4516 df-cnv 4517 df-co 4518 df-dm 4519 df-rn 4520 df-res 4521 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-1st 6006 df-2nd 6007 df-1o 6281 df-dju 6891 df-inl 6900 df-inr 6901 |
This theorem is referenced by: djur 6922 exmidfodomrlemreseldju 7024 |
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