| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 3376 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐶)) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐴 ∪ 𝐶) = (𝐵 ∪ 𝐶)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∪ cun 3218 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-un 3224 |
| This theorem is used by: ifeq1 3643 preq1 3788 tpeq1 3797 tpeq2 3798 resasplitss 5572 fmptpr 5910 funresdfunsnss 5921 rdgisucinc 6661 oasuc 6742 omsuc 6750 funresdfunsndc 6784 fisseneq 7248 sbthlemi5 7285 exmidfodomrlemim 7559 fzpred 10493 fseq1p1m1 10517 nn0split 10559 nnsplit 10560 fzo0sn0fzo1 10655 fzosplitpr 10668 fzosplitprm1 10669 zsupcllemstep 10678 hashfibclem 11303 fsum1p 12209 fprod1p 12390 setsvala 13440 setsabsd 13448 setscom 13449 prdsex 14278 prdsval 14279 psrmulrg 15195 plyaddlem1 15990 plymullem1 15991 birthdaylem2 16243 |
| Copyright terms: Public domain | W3C validator |