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Mirrors > Home > ILE Home > Th. List > djuex | Unicode version |
Description: The disjoint union of sets is a set. See also the more precise djuss 6955. (Contributed by AV, 28-Jun-2022.) |
Ref | Expression |
---|---|
djuex | ⊔ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-dju 6923 | . 2 ⊔ | |
2 | p0ex 4112 | . . . . . . 7 | |
3 | 2 | a1i 9 | . . . . . 6 |
4 | 3 | anim1i 338 | . . . . 5 |
5 | 4 | ancoms 266 | . . . 4 |
6 | xpexg 4653 | . . . 4 | |
7 | 5, 6 | syl 14 | . . 3 |
8 | 1on 6320 | . . . . . . 7 | |
9 | 8 | elexi 2698 | . . . . . 6 |
10 | 9 | snex 4109 | . . . . 5 |
11 | 10 | a1i 9 | . . . 4 |
12 | xpexg 4653 | . . . 4 | |
13 | 11, 12 | sylan 281 | . . 3 |
14 | unexg 4364 | . . 3 | |
15 | 7, 13, 14 | syl2anc 408 | . 2 |
16 | 1, 15 | eqeltrid 2226 | 1 ⊔ |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wcel 1480 cvv 2686 cun 3069 c0 3363 csn 3527 con0 4285 cxp 4537 c1o 6306 ⊔ cdju 6922 |
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 2121 ax-sep 4046 ax-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-opab 3990 df-tr 4027 df-iord 4288 df-on 4290 df-suc 4293 df-xp 4545 df-1o 6313 df-dju 6923 |
This theorem is referenced by: djuexb 6929 updjud 6967 djudom 6978 exmidfodomrlemr 7058 exmidfodomrlemrALT 7059 djudoml 7075 djudomr 7076 exmidsbthrlem 13220 sbthom 13224 |
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