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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 5845 funresdfunsnss 5856 rdgisucinc 6550 oasuc 6631 omsuc 6639 funresdfunsndc 6673 fisseneq 7126 sbthlemi5 7159 exmidfodomrlemim 7411 fzpred 10304 fseq1p1m1 10328 nn0split 10370 nnsplit 10371 fzo0sn0fzo1 10465 fzosplitpr 10478 fzosplitprm1 10479 zsupcllemstep 10488 fsum1p 11978 fprod1p 12159 setsvala 13112 setsabsd 13120 setscom 13121 prdsex 13351 prdsval 13355 plyaddlem1 15470 plymullem1 15471 |
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