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Theorem otthne 33585
Description: Contrapositive of the ordered triple theorem. (Contributed by Scott Fenton, 21-Aug-2024.)
Hypotheses
Ref Expression
otthne.1 𝐴 ∈ V
otthne.2 𝐵 ∈ V
otthne.3 𝐶 ∈ V
Assertion
Ref Expression
otthne (⟨⟨𝐴, 𝐵⟩, 𝐶⟩ ≠ ⟨⟨𝐷, 𝐸⟩, 𝐹⟩ ↔ (𝐴𝐷𝐵𝐸𝐶𝐹))

Proof of Theorem otthne
StepHypRef Expression
1 otthne.1 . . . 4 𝐴 ∈ V
2 otthne.2 . . . 4 𝐵 ∈ V
31, 2opthne 5391 . . 3 (⟨𝐴, 𝐵⟩ ≠ ⟨𝐷, 𝐸⟩ ↔ (𝐴𝐷𝐵𝐸))
43orbi1i 910 . 2 ((⟨𝐴, 𝐵⟩ ≠ ⟨𝐷, 𝐸⟩ ∨ 𝐶𝐹) ↔ ((𝐴𝐷𝐵𝐸) ∨ 𝐶𝐹))
5 opex 5373 . . 3 𝐴, 𝐵⟩ ∈ V
6 otthne.3 . . 3 𝐶 ∈ V
75, 6opthne 5391 . 2 (⟨⟨𝐴, 𝐵⟩, 𝐶⟩ ≠ ⟨⟨𝐷, 𝐸⟩, 𝐹⟩ ↔ (⟨𝐴, 𝐵⟩ ≠ ⟨𝐷, 𝐸⟩ ∨ 𝐶𝐹))
8 df-3or 1086 . 2 ((𝐴𝐷𝐵𝐸𝐶𝐹) ↔ ((𝐴𝐷𝐵𝐸) ∨ 𝐶𝐹))
94, 7, 83bitr4i 302 1 (⟨⟨𝐴, 𝐵⟩, 𝐶⟩ ≠ ⟨⟨𝐷, 𝐸⟩, 𝐹⟩ ↔ (𝐴𝐷𝐵𝐸𝐶𝐹))
Colors of variables: wff setvar class
Syntax hints:  wb 205  wo 843  w3o 1084  wcel 2108  wne 2942  Vcvv 3422  cop 4564
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pr 5347
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-sb 2069  df-clab 2716  df-cleq 2730  df-clel 2817  df-ne 2943  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565
This theorem is referenced by:  xpord3lem  33722  xpord3pred  33725  xpord3ind  33727
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