Theorem opswapg 5249

Description: Swap the members of an ordered pair. (Contributed by Jim Kingdon, 16-Dec-2018.)

Assertion

Ref	Expression
opswapg	⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ⟨𝐵, 𝐴⟩)

Proof of Theorem opswapg

Step	Hyp	Ref	Expression
1		cnvsng 5248	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ◡{⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
2	1	unieqd 3925	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ∪ {⟨𝐵, 𝐴⟩})
3		elex 2825	. . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V)
4		elex 2825	. . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V)
5		opexg 4344	. . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐴 ∈ V) → ⟨𝐵, 𝐴⟩ ∈ V)
6	3, 4, 5	syl2anr 290	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ⟨𝐵, 𝐴⟩ ∈ V)
7		unisng 3931	. . 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 2265	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ⟨𝐵, 𝐴⟩)

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1398   ∈ wcel 2203  Vcvv 2813  {csn 3689  ⟨cop 3692  ∪ cuni 3914  ^◡ccnv 4748

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2815  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-br 4110  df-opab 4172  df-xp 4755  df-rel 4756  df-cnv 4757

This theorem is referenced by:  2nd1st  6374  cnvf1olem  6420  brtposg  6485  dftpos4  6494  tpostpos  6495  xpcomco  7077  fsumcnv  12123  fprodcnv  12311  txswaphmeolem  15185