| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > preq12d | GIF version | ||
| Description: Equality deduction for unordered pairs. (Contributed by NM, 19-Oct-2012.) |
| Ref | Expression |
|---|---|
| preq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| preq12d.2 | ⊢ (𝜑 → 𝐶 = 𝐷) |
| Ref | Expression |
|---|---|
| preq12d | ⊢ (𝜑 → {𝐴, 𝐶} = {𝐵, 𝐷}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | preq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | preq12d.2 | . 2 ⊢ (𝜑 → 𝐶 = 𝐷) | |
| 3 | preq12 3751 | . 2 ⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → {𝐴, 𝐶} = {𝐵, 𝐷}) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → {𝐴, 𝐶} = {𝐵, 𝐷}) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 {cpr 3671 |
| 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 2212 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-v 2803 df-un 3203 df-sn 3676 df-pr 3677 |
| This theorem is referenced by: opeq1 3863 opeq2 3864 xrminrecl 11856 xrminadd 11858 prdsval 13379 xpsfval 13454 xpsval 13458 ring1 14096 xmetxp 15260 xmetxpbl 15261 txmetcnp 15271 hovera 15400 hoverb 15401 hoverlt1 15402 hovergt0 15403 ivthdich 15406 wkslem1 16200 wkslem2 16201 iswlk 16203 2wlklem 16256 isclwwlk 16274 clwwlkccatlem 16280 clwwlkccat 16281 clwwlkn2 16301 clwwlkext2edg 16302 umgr2cwwk2dif 16304 s2elclwwlknon2 16316 clwwlknonex2lem2 16318 clwwlknonex2 16319 eupthseg 16332 eupth2lem3fi 16356 |
| Copyright terms: Public domain | W3C validator |