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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 3366 | . 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 3209 |
| 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 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 df-un 3215 |
| This theorem is referenced by: ifeq1 3625 preq1 3768 tpeq1 3777 tpeq2 3778 resasplitss 5544 fmptpr 5876 funresdfunsnss 5887 rdgisucinc 6616 oasuc 6697 omsuc 6705 funresdfunsndc 6739 fisseneq 7195 sbthlemi5 7231 exmidfodomrlemim 7504 fzpred 10404 fseq1p1m1 10428 nn0split 10470 nnsplit 10471 fzo0sn0fzo1 10566 fzosplitpr 10579 fzosplitprm1 10580 zsupcllemstep 10589 hashfibclem 11206 fsum1p 12104 fprod1p 12285 setsvala 13243 setsabsd 13251 setscom 13252 prdsex 13482 prdsval 13486 plyaddlem1 15612 plymullem1 15613 |
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