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Theorem opswapg 4807
Description: Swap the members of an ordered pair. (Contributed by Jim Kingdon, 16-Dec-2018.)
Assertion
Ref Expression
opswapg ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩} = ⟨𝐵, 𝐴⟩)

Proof of Theorem opswapg
StepHypRef Expression
1 cnvsng 4806 . . 3 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
21unieqd 3591 . 2 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
3 elex 2566 . . . 4 (𝐵𝑊𝐵 ∈ V)
4 elex 2566 . . . 4 (𝐴𝑉𝐴 ∈ V)
5 opexgOLD 3965 . . . 4 ((𝐵 ∈ V ∧ 𝐴 ∈ V) → ⟨𝐵, 𝐴⟩ ∈ V)
63, 4, 5syl2anr 274 . . 3 ((𝐴𝑉𝐵𝑊) → ⟨𝐵, 𝐴⟩ ∈ V)
7 unisng 3597 . . 3 (⟨𝐵, 𝐴⟩ ∈ V → {⟨𝐵, 𝐴⟩} = ⟨𝐵, 𝐴⟩)
86, 7syl 14 . 2 ((𝐴𝑉𝐵𝑊) → {⟨𝐵, 𝐴⟩} = ⟨𝐵, 𝐴⟩)
92, 8eqtrd 2072 1 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩} = ⟨𝐵, 𝐴⟩)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 97   = wceq 1243  wcel 1393  Vcvv 2557  {csn 3375  cop 3378   cuni 3580  ccnv 4344
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875  ax-pow 3927  ax-pr 3944
This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-eu 1903  df-mo 1904  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ral 2311  df-rex 2312  df-v 2559  df-un 2922  df-in 2924  df-ss 2931  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  df-uni 3581  df-br 3765  df-opab 3819  df-xp 4351  df-rel 4352  df-cnv 4353
This theorem is referenced by:  2nd1st  5806  cnvf1olem  5845  brtposg  5869  dftpos4  5878  tpostpos  5879  xpcomco  6300
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