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Theorem cnvprop 33052
Description: Converse of a pair of ordered pairs. (Contributed by Thierry Arnoux, 24-Sep-2023.)
Assertion
Ref Expression
cnvprop (((𝐴𝑉𝐵𝑊) ∧ (𝐶𝑉𝐷𝑊)) → {⟨𝐴, 𝐵⟩, ⟨𝐶, 𝐷⟩} = {⟨𝐵, 𝐴⟩, ⟨𝐷, 𝐶⟩})

Proof of Theorem cnvprop
StepHypRef Expression
1 cnvsng 6223 . . . 4 ((𝐴𝑉𝐵𝑊) → {⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
21adantr 485 . . 3 (((𝐴𝑉𝐵𝑊) ∧ (𝐶𝑉𝐷𝑊)) → {⟨𝐴, 𝐵⟩} = {⟨𝐵, 𝐴⟩})
3 cnvsng 6223 . . . 4 ((𝐶𝑉𝐷𝑊) → {⟨𝐶, 𝐷⟩} = {⟨𝐷, 𝐶⟩})
43adantl 486 . . 3 (((𝐴𝑉𝐵𝑊) ∧ (𝐶𝑉𝐷𝑊)) → {⟨𝐶, 𝐷⟩} = {⟨𝐷, 𝐶⟩})
52, 4uneq12d 4122 . 2 (((𝐴𝑉𝐵𝑊) ∧ (𝐶𝑉𝐷𝑊)) → ({⟨𝐴, 𝐵⟩} ∪ {⟨𝐶, 𝐷⟩}) = ({⟨𝐵, 𝐴⟩} ∪ {⟨𝐷, 𝐶⟩}))
6 df-pr 4591 . . . 4 {⟨𝐴, 𝐵⟩, ⟨𝐶, 𝐷⟩} = ({⟨𝐴, 𝐵⟩} ∪ {⟨𝐶, 𝐷⟩})
76cnveqi 5859 . . 3 {⟨𝐴, 𝐵⟩, ⟨𝐶, 𝐷⟩} = ({⟨𝐴, 𝐵⟩} ∪ {⟨𝐶, 𝐷⟩})
8 cnvun 6138 . . 3 ({⟨𝐴, 𝐵⟩} ∪ {⟨𝐶, 𝐷⟩}) = ({⟨𝐴, 𝐵⟩} ∪ {⟨𝐶, 𝐷⟩})
97, 8eqtri 2785 . 2 {⟨𝐴, 𝐵⟩, ⟨𝐶, 𝐷⟩} = ({⟨𝐴, 𝐵⟩} ∪ {⟨𝐶, 𝐷⟩})
10 df-pr 4591 . 2 {⟨𝐵, 𝐴⟩, ⟨𝐷, 𝐶⟩} = ({⟨𝐵, 𝐴⟩} ∪ {⟨𝐷, 𝐶⟩})
115, 9, 103eqtr4g 2822 1 (((𝐴𝑉𝐵𝑊) ∧ (𝐶𝑉𝐷𝑊)) → {⟨𝐴, 𝐵⟩, ⟨𝐶, 𝐷⟩} = {⟨𝐵, 𝐴⟩, ⟨𝐷, 𝐶⟩})
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 400   = wceq 1569  wcel 2142  cun 3902  {csn 4588  {cpr 4590  cop 4594  ccnv 5659
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1824  ax-4 1838  ax-5 1939  ax-6 1996  ax-7 2037  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5256  ax-pr 5403
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1104  df-tru 1572  df-fal 1582  df-ex 1809  df-sb 2096  df-clab 2741  df-cleq 2754  df-clel 2837  df-ral 3079  df-rex 3089  df-rab 3416  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-sn 4589  df-pr 4591  df-op 4595  df-br 5109  df-opab 5173  df-xp 5666  df-rel 5667  df-cnv 5668
This theorem is used by:  cycpm2tr  33448
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