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Theorem opelcnv 5867
Description: Ordered-pair membership in converse relation. (Contributed by NM, 13-Aug-1995.)
Hypotheses
Ref Expression
opelcnv.1 𝐴 ∈ V
opelcnv.2 𝐵 ∈ V
Assertion
Ref Expression
opelcnv (⟨𝐴, 𝐵⟩ ∈ 𝑅 ↔ ⟨𝐵, 𝐴⟩ ∈ 𝑅)

Proof of Theorem opelcnv
StepHypRef Expression
1 opelcnv.1 . 2 𝐴 ∈ V
2 opelcnv.2 . 2 𝐵 ∈ V
3 opelcnvg 5866 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (⟨𝐴, 𝐵⟩ ∈ 𝑅 ↔ ⟨𝐵, 𝐴⟩ ∈ 𝑅))
41, 2, 3mp2an 704 1 (⟨𝐴, 𝐵⟩ ∈ 𝑅 ↔ ⟨𝐵, 𝐴⟩ ∈ 𝑅)
Colors of variables: wff setvar class
Syntax hints:  wb 209  wcel 2141  Vcvv 3453  cop 4594  ccnv 5660
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-ext 2733  ax-sep 5256  ax-pr 5404
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-sb 2095  df-clab 2740  df-cleq 2753  df-clel 2836  df-rab 3415  df-v 3455  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-cnv 5669
This theorem is referenced by:  cnvopab  6137  cnvdif  6140  dfrel2  6187  cnvcnvsn  6220  cnvresima  6231  dfco2  6246  cnviin  6287  fcnvres  6755  cnvf1olem  8104  cnvimadfsn  8167  dmtpos  8233  dftpos4  8240  tpostpos  8241  brsdom2  9088  fsumcom2  15824  fprodcom2  16037  gsumcom2  20044  metustsym  24691  gsumhashmul  33353  cnvco1  36205  cnvco2  36206  cnviun  44324  tposideq  49611
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