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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 3354 | . 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 1397 ∪ cun 3198 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-un 3204 |
| This theorem is referenced by: ifeq1 3608 preq1 3748 tpeq1 3757 tpeq2 3758 resasplitss 5516 fmptpr 5846 funresdfunsnss 5857 rdgisucinc 6551 oasuc 6632 omsuc 6640 funresdfunsndc 6674 fisseneq 7127 sbthlemi5 7160 exmidfodomrlemim 7412 fzpred 10305 fseq1p1m1 10329 nn0split 10371 nnsplit 10372 fzo0sn0fzo1 10467 fzosplitpr 10480 fzosplitprm1 10481 zsupcllemstep 10490 fsum1p 11997 fprod1p 12178 setsvala 13131 setsabsd 13139 setscom 13140 prdsex 13370 prdsval 13374 plyaddlem1 15490 plymullem1 15491 |
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