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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 5187 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ◡{〈𝐴, 𝐵〉} = {〈𝐵, 𝐴〉}) | |
| 2 | 1 | unieqd 3875 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{〈𝐴, 𝐵〉} = ∪ {〈𝐵, 𝐴〉}) |
| 3 | elex 2788 | . . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V) | |
| 4 | elex 2788 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V) | |
| 5 | opexg 4290 | . . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐴 ∈ V) → 〈𝐵, 𝐴〉 ∈ V) | |
| 6 | 3, 4, 5 | syl2anr 290 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 〈𝐵, 𝐴〉 ∈ V) |
| 7 | unisng 3881 | . . 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 2240 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{〈𝐴, 𝐵〉} = 〈𝐵, 𝐴〉) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1373 ∈ wcel 2178 Vcvv 2776 {csn 3643 〈cop 3646 ∪ cuni 3864 ◡ccnv 4692 |
| 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 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-pow 4234 ax-pr 4269 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-v 2778 df-un 3178 df-in 3180 df-ss 3187 df-pw 3628 df-sn 3649 df-pr 3650 df-op 3652 df-uni 3865 df-br 4060 df-opab 4122 df-xp 4699 df-rel 4700 df-cnv 4701 |
| This theorem is referenced by: 2nd1st 6289 cnvf1olem 6333 brtposg 6363 dftpos4 6372 tpostpos 6373 xpcomco 6946 fsumcnv 11863 fprodcnv 12051 txswaphmeolem 14907 |
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