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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 3377 | . 2 ⊢ (𝐴 = 𝐵 → (𝐶 ∪ 𝐴) = (𝐶 ∪ 𝐵)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐶 ∪ 𝐴) = (𝐶 ∪ 𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∪ cun 3218 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 |
| This theorem is used by: ifeq2 3644 tpeq3 3799 iununir 4096 unisucg 4561 relcoi1 5322 resasplitss 5572 fvun1 5772 fmptapd 5909 fvunsng 5912 fnsnsplitss 5917 tfr1onlemaccex 6624 tfrcllemaccex 6637 rdgeq1 6647 rdgivallem 6657 rdgisuc1 6660 rdgon 6662 rdg0 6663 oav2 6741 oasuc 6742 omv2 6743 omsuc 6750 fnsnsplitdc 6783 unsnfidcex 7233 undifdc 7237 fiintim 7244 ssfirab 7250 fnfi 7256 fidcenumlemr 7279 sbthlemi5 7285 sbthlemi6 7286 pm54.43 7542 fzsuc 10491 fzspl 10492 fseq1p1m1 10517 fseq1m1p1 10518 fzosplitsnm1 10643 fzosplitsn 10667 fzosplitpr 10668 fzosplitprm1 10669 resunimafz0 11295 zfz1isolemsplit 11311 fsumm1 12207 fprodm1 12389 ballotfilemfp1 13288 ennnfonelemp1 13354 ennnfonelemhdmp1 13357 ennnfonelemkh 13360 ennnfonelemhf1o 13361 ennnfonelemnn0 13370 strsetsid 13442 setscom 13449 gsump1 14246 gsummptfidmsplit 14253 gsumresfi 14262 lspun0 14870 ppiprm 16276 chtprm 16278 p1evtxdeqfilem 16774 clwwlknonex2lem1 16900 bj-charfundcALT 17057 |
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