Theorem opswapg 5215

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 5214	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ◡{⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
2	1	unieqd 3899	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ∪ {⟨𝐵, 𝐴⟩})
3		elex 2811	. . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V)
4		elex 2811	. . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V)
5		opexg 4314	. . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐴 ∈ V) → ⟨𝐵, 𝐴⟩ ∈ V)
6	3, 4, 5	syl2anr 290	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ⟨𝐵, 𝐴⟩ ∈ V)
7		unisng 3905	. . 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 2262	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ⟨𝐵, 𝐴⟩)

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1395   ∈ wcel 2200  Vcvv 2799  {csn 3666  ⟨cop 3669  ∪ cuni 3888  ^◡ccnv 4718

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-xp 4725  df-rel 4726  df-cnv 4727

This theorem is referenced by:  2nd1st  6326  cnvf1olem  6370  brtposg  6400  dftpos4  6409  tpostpos  6410  xpcomco  6985  fsumcnv  11948  fprodcnv  12136  txswaphmeolem  14994