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Theorem otthne 33213
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 5346 . . 3 (⟨𝐴, 𝐵⟩ ≠ ⟨𝐷, 𝐸⟩ ↔ (𝐴𝐷𝐵𝐸))
43orbi1i 911 . 2 ((⟨𝐴, 𝐵⟩ ≠ ⟨𝐷, 𝐸⟩ ∨ 𝐶𝐹) ↔ ((𝐴𝐷𝐵𝐸) ∨ 𝐶𝐹))
5 opex 5328 . . 3 𝐴, 𝐵⟩ ∈ V
6 otthne.3 . . 3 𝐶 ∈ V
75, 6opthne 5346 . 2 (⟨⟨𝐴, 𝐵⟩, 𝐶⟩ ≠ ⟨⟨𝐷, 𝐸⟩, 𝐹⟩ ↔ (⟨𝐴, 𝐵⟩ ≠ ⟨𝐷, 𝐸⟩ ∨ 𝐶𝐹))
8 df-3or 1085 . 2 ((𝐴𝐷𝐵𝐸𝐶𝐹) ↔ ((𝐴𝐷𝐵𝐸) ∨ 𝐶𝐹))
94, 7, 83bitr4i 306 1 (⟨⟨𝐴, 𝐵⟩, 𝐶⟩ ≠ ⟨⟨𝐷, 𝐸⟩, 𝐹⟩ ↔ (𝐴𝐷𝐵𝐸𝐶𝐹))
Colors of variables: wff setvar class
Syntax hints:  wb 209  wo 844  w3o 1083  wcel 2111  wne 2951  Vcvv 3409  cop 4531
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-ext 2729  ax-sep 5173  ax-nul 5180  ax-pr 5302
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-sb 2070  df-clab 2736  df-cleq 2750  df-clel 2830  df-ne 2952  df-v 3411  df-dif 3863  df-un 3865  df-nul 4228  df-if 4424  df-sn 4526  df-pr 4528  df-op 4532
This theorem is referenced by:  xpord3lem  33362  xpord3pred  33365  xpord3ind  33367  no3indslem  33697
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