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Mirrors > Home > ILE Home > Th. List > uneq2d | GIF version |
Description: Deduction adding union to the left in a class equality. (Contributed by NM, 29-Mar-1998.) |
Ref | Expression |
---|---|
uneq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
Ref | Expression |
---|---|
uneq2d | ⊢ (𝜑 → (𝐶 ∪ 𝐴) = (𝐶 ∪ 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uneq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
2 | uneq2 3265 | . 2 ⊢ (𝐴 = 𝐵 → (𝐶 ∪ 𝐴) = (𝐶 ∪ 𝐵)) | |
3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐶 ∪ 𝐴) = (𝐶 ∪ 𝐵)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1342 ∪ cun 3109 |
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 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-ext 2146 |
This theorem depends on definitions: df-bi 116 df-tru 1345 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-v 2723 df-un 3115 |
This theorem is referenced by: ifeq2 3519 tpeq3 3658 iununir 3943 unisucg 4386 relcoi1 5129 resasplitss 5361 fvun1 5546 fmptapd 5670 fvunsng 5673 fnsnsplitss 5678 tfr1onlemaccex 6307 tfrcllemaccex 6320 rdgeq1 6330 rdgivallem 6340 rdgisuc1 6343 rdgon 6345 rdg0 6346 oav2 6422 oasuc 6423 omv2 6424 omsuc 6431 fnsnsplitdc 6464 unsnfidcex 6876 undifdc 6880 fiintim 6885 ssfirab 6890 fnfi 6893 fidcenumlemr 6911 sbthlemi5 6917 sbthlemi6 6918 pm54.43 7137 fzsuc 9994 fseq1p1m1 10019 fseq1m1p1 10020 fzosplitsnm1 10134 fzosplitsn 10158 fzosplitprm1 10159 resunimafz0 10730 zfz1isolemsplit 10737 fsumm1 11343 fprodm1 11525 ennnfonelemp1 12276 ennnfonelemhdmp1 12279 ennnfonelemkh 12282 ennnfonelemhf1o 12283 ennnfonelemnn0 12292 strsetsid 12364 setscom 12371 bj-charfundcALT 13526 |
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