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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 3311 | . 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 1364 ∪ cun 3155 |
| 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 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-ext 2178 |
| This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-v 2765 df-un 3161 |
| This theorem is referenced by: ifeq1 3565 preq1 3700 tpeq1 3709 tpeq2 3710 resasplitss 5440 fmptpr 5757 funresdfunsnss 5768 rdgisucinc 6452 oasuc 6531 omsuc 6539 funresdfunsndc 6573 fisseneq 7004 sbthlemi5 7036 exmidfodomrlemim 7282 fzpred 10164 fseq1p1m1 10188 nn0split 10230 nnsplit 10231 fzo0sn0fzo1 10316 fzosplitprm1 10329 zsupcllemstep 10338 fsum1p 11602 fprod1p 11783 setsvala 12736 setsabsd 12744 setscom 12745 prdsex 12973 prdsval 12977 plyaddlem1 15091 plymullem1 15092 |
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