Theorem opswapg 4951

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 4950	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ◡{⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
2	1	unieqd 3686	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ∪ {⟨𝐵, 𝐴⟩})
3		elex 2644	. . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V)
4		elex 2644	. . . 4 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ V)
5		opexg 4079	. . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐴 ∈ V) → ⟨𝐵, 𝐴⟩ ∈ V)
6	3, 4, 5	syl2anr 285	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ⟨𝐵, 𝐴⟩ ∈ V)
7		unisng 3692	. . 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 2127	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ∪ ◡{⟨𝐴, 𝐵⟩} = ⟨𝐵, 𝐴⟩)

Syntax hints:   → wi 4   ∧ wa 103   = wceq 1296   ∈ wcel 1445  Vcvv 2633  {csn 3466  ⟨cop 3469  ∪ cuni 3675  ^◡ccnv 4466

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 668  ax-5 1388  ax-7 1389  ax-gen 1390  ax-ie1 1434  ax-ie2 1435  ax-8 1447  ax-10 1448  ax-11 1449  ax-i12 1450  ax-bndl 1451  ax-4 1452  ax-14 1457  ax-17 1471  ax-i9 1475  ax-ial 1479  ax-i5r 1480  ax-ext 2077  ax-sep 3978  ax-pow 4030  ax-pr 4060

This theorem depends on definitions:  df-bi 116  df-3an 929  df-tru 1299  df-nf 1402  df-sb 1700  df-eu 1958  df-mo 1959  df-clab 2082  df-cleq 2088  df-clel 2091  df-nfc 2224  df-ral 2375  df-rex 2376  df-v 2635  df-un 3017  df-in 3019  df-ss 3026  df-pw 3451  df-sn 3472  df-pr 3473  df-op 3475  df-uni 3676  df-br 3868  df-opab 3922  df-xp 4473  df-rel 4474  df-cnv 4475

This theorem is referenced by:  2nd1st  5988  cnvf1olem  6027  brtposg  6057  dftpos4  6066  tpostpos  6067  xpcomco  6622  fsumcnv  10996