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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 3356 | . 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 3199 |
| 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 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-un 3205 |
| This theorem is referenced by: ifeq1 3612 preq1 3752 tpeq1 3761 tpeq2 3762 resasplitss 5524 fmptpr 5854 funresdfunsnss 5865 rdgisucinc 6594 oasuc 6675 omsuc 6683 funresdfunsndc 6717 fisseneq 7170 sbthlemi5 7203 exmidfodomrlemim 7455 fzpred 10350 fseq1p1m1 10374 nn0split 10416 nnsplit 10417 fzo0sn0fzo1 10512 fzosplitpr 10525 fzosplitprm1 10526 zsupcllemstep 10535 fsum1p 12042 fprod1p 12223 setsvala 13176 setsabsd 13184 setscom 13185 prdsex 13415 prdsval 13419 plyaddlem1 15541 plymullem1 15542 |
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