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| Mirrors > Home > ILE Home > Th. List > uneq1d | GIF version | ||
| Description: Deduction adding union to the right in a class equality. (Contributed by NM, 29-Mar-1998.) |
| Ref | Expression |
|---|---|
| uneq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| uneq1d | ⊢ (𝜑 → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uneq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | uneq1 3370 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐶)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐶)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ∪ cun 3212 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2216 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-un 3218 |
| This theorem is referenced by: ifeq1 3629 preq1 3773 tpeq1 3782 tpeq2 3783 resasplitss 5549 fmptpr 5881 funresdfunsnss 5892 rdgisucinc 6629 oasuc 6710 omsuc 6718 funresdfunsndc 6752 fisseneq 7208 sbthlemi5 7244 exmidfodomrlemim 7517 fzpred 10426 fseq1p1m1 10450 nn0split 10492 nnsplit 10493 fzo0sn0fzo1 10588 fzosplitpr 10601 fzosplitprm1 10602 zsupcllemstep 10611 hashfibclem 11231 fsum1p 12129 fprod1p 12310 setsvala 13327 setsabsd 13335 setscom 13336 prdsex 14114 prdsval 14115 plyaddlem1 15738 plymullem1 15739 |
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