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| Mirrors > Home > ILE Home > Th. List > opswapg | GIF version | ||
| Description: Swap the members of an ordered pair. (Contributed by Jim Kingdon, 16-Dec-2018.) |
| Ref | Expression |
|---|---|
| opswapg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{〈𝐴, 𝐵〉} = 〈𝐵, 𝐴〉) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnvsng 5168 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ◡{〈𝐴, 𝐵〉} = {〈𝐵, 𝐴〉}) | |
| 2 | 1 | unieqd 3861 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{〈𝐴, 𝐵〉} = ∪ {〈𝐵, 𝐴〉}) |
| 3 | elex 2783 | . . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V) | |
| 4 | elex 2783 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
| 5 | opexg 4272 | . . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐴 ∈ V) → 〈𝐵, 𝐴〉 ∈ V) | |
| 6 | 3, 4, 5 | syl2anr 290 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 〈𝐵, 𝐴〉 ∈ V) |
| 7 | unisng 3867 | . . 3 ⊢ (〈𝐵, 𝐴〉 ∈ V → ∪ {〈𝐵, 𝐴〉} = 〈𝐵, 𝐴〉) | |
| 8 | 6, 7 | syl 14 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ {〈𝐵, 𝐴〉} = 〈𝐵, 𝐴〉) |
| 9 | 2, 8 | eqtrd 2238 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{〈𝐴, 𝐵〉} = 〈𝐵, 𝐴〉) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1373 ∈ wcel 2176 Vcvv 2772 {csn 3633 〈cop 3636 ∪ cuni 3850 ◡ccnv 4674 |
| 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 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-14 2179 ax-ext 2187 ax-sep 4162 ax-pow 4218 ax-pr 4253 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-eu 2057 df-mo 2058 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 df-rex 2490 df-v 2774 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-uni 3851 df-br 4045 df-opab 4106 df-xp 4681 df-rel 4682 df-cnv 4683 |
| This theorem is referenced by: 2nd1st 6266 cnvf1olem 6310 brtposg 6340 dftpos4 6349 tpostpos 6350 xpcomco 6921 fsumcnv 11748 fprodcnv 11936 txswaphmeolem 14792 |
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