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Theorem pocl 5002
 Description: Properties of partial order relation in class notation. (Contributed by NM, 27-Mar-1997.)
Assertion
Ref Expression
pocl (𝑅 Po 𝐴 → ((𝐵𝐴𝐶𝐴𝐷𝐴) → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝐷) → 𝐵𝑅𝐷))))

Proof of Theorem pocl
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 id 22 . . . . . . 7 (𝑥 = 𝐵𝑥 = 𝐵)
21, 1breq12d 4626 . . . . . 6 (𝑥 = 𝐵 → (𝑥𝑅𝑥𝐵𝑅𝐵))
32notbid 308 . . . . 5 (𝑥 = 𝐵 → (¬ 𝑥𝑅𝑥 ↔ ¬ 𝐵𝑅𝐵))
4 breq1 4616 . . . . . . 7 (𝑥 = 𝐵 → (𝑥𝑅𝑦𝐵𝑅𝑦))
54anbi1d 740 . . . . . 6 (𝑥 = 𝐵 → ((𝑥𝑅𝑦𝑦𝑅𝑧) ↔ (𝐵𝑅𝑦𝑦𝑅𝑧)))
6 breq1 4616 . . . . . 6 (𝑥 = 𝐵 → (𝑥𝑅𝑧𝐵𝑅𝑧))
75, 6imbi12d 334 . . . . 5 (𝑥 = 𝐵 → (((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧) ↔ ((𝐵𝑅𝑦𝑦𝑅𝑧) → 𝐵𝑅𝑧)))
83, 7anbi12d 746 . . . 4 (𝑥 = 𝐵 → ((¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧)) ↔ (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝑦𝑦𝑅𝑧) → 𝐵𝑅𝑧))))
98imbi2d 330 . . 3 (𝑥 = 𝐵 → ((𝑅 Po 𝐴 → (¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧))) ↔ (𝑅 Po 𝐴 → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝑦𝑦𝑅𝑧) → 𝐵𝑅𝑧)))))
10 breq2 4617 . . . . . . 7 (𝑦 = 𝐶 → (𝐵𝑅𝑦𝐵𝑅𝐶))
11 breq1 4616 . . . . . . 7 (𝑦 = 𝐶 → (𝑦𝑅𝑧𝐶𝑅𝑧))
1210, 11anbi12d 746 . . . . . 6 (𝑦 = 𝐶 → ((𝐵𝑅𝑦𝑦𝑅𝑧) ↔ (𝐵𝑅𝐶𝐶𝑅𝑧)))
1312imbi1d 331 . . . . 5 (𝑦 = 𝐶 → (((𝐵𝑅𝑦𝑦𝑅𝑧) → 𝐵𝑅𝑧) ↔ ((𝐵𝑅𝐶𝐶𝑅𝑧) → 𝐵𝑅𝑧)))
1413anbi2d 739 . . . 4 (𝑦 = 𝐶 → ((¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝑦𝑦𝑅𝑧) → 𝐵𝑅𝑧)) ↔ (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝑧) → 𝐵𝑅𝑧))))
1514imbi2d 330 . . 3 (𝑦 = 𝐶 → ((𝑅 Po 𝐴 → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝑦𝑦𝑅𝑧) → 𝐵𝑅𝑧))) ↔ (𝑅 Po 𝐴 → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝑧) → 𝐵𝑅𝑧)))))
16 breq2 4617 . . . . . . 7 (𝑧 = 𝐷 → (𝐶𝑅𝑧𝐶𝑅𝐷))
1716anbi2d 739 . . . . . 6 (𝑧 = 𝐷 → ((𝐵𝑅𝐶𝐶𝑅𝑧) ↔ (𝐵𝑅𝐶𝐶𝑅𝐷)))
18 breq2 4617 . . . . . 6 (𝑧 = 𝐷 → (𝐵𝑅𝑧𝐵𝑅𝐷))
1917, 18imbi12d 334 . . . . 5 (𝑧 = 𝐷 → (((𝐵𝑅𝐶𝐶𝑅𝑧) → 𝐵𝑅𝑧) ↔ ((𝐵𝑅𝐶𝐶𝑅𝐷) → 𝐵𝑅𝐷)))
2019anbi2d 739 . . . 4 (𝑧 = 𝐷 → ((¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝑧) → 𝐵𝑅𝑧)) ↔ (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝐷) → 𝐵𝑅𝐷))))
2120imbi2d 330 . . 3 (𝑧 = 𝐷 → ((𝑅 Po 𝐴 → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝑧) → 𝐵𝑅𝑧))) ↔ (𝑅 Po 𝐴 → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝐷) → 𝐵𝑅𝐷)))))
22 df-po 4995 . . . . . . 7 (𝑅 Po 𝐴 ↔ ∀𝑥𝐴𝑦𝐴𝑧𝐴𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧)))
23 r3al 2935 . . . . . . 7 (∀𝑥𝐴𝑦𝐴𝑧𝐴𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧)) ↔ ∀𝑥𝑦𝑧((𝑥𝐴𝑦𝐴𝑧𝐴) → (¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧))))
2422, 23sylbb 209 . . . . . 6 (𝑅 Po 𝐴 → ∀𝑥𝑦𝑧((𝑥𝐴𝑦𝐴𝑧𝐴) → (¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧))))
252419.21bbi 2058 . . . . 5 (𝑅 Po 𝐴 → ∀𝑧((𝑥𝐴𝑦𝐴𝑧𝐴) → (¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧))))
262519.21bi 2057 . . . 4 (𝑅 Po 𝐴 → ((𝑥𝐴𝑦𝐴𝑧𝐴) → (¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧))))
2726com12 32 . . 3 ((𝑥𝐴𝑦𝐴𝑧𝐴) → (𝑅 Po 𝐴 → (¬ 𝑥𝑅𝑥 ∧ ((𝑥𝑅𝑦𝑦𝑅𝑧) → 𝑥𝑅𝑧))))
289, 15, 21, 27vtocl3ga 3262 . 2 ((𝐵𝐴𝐶𝐴𝐷𝐴) → (𝑅 Po 𝐴 → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝐷) → 𝐵𝑅𝐷))))
2928com12 32 1 (𝑅 Po 𝐴 → ((𝐵𝐴𝐶𝐴𝐷𝐴) → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐶𝐶𝑅𝐷) → 𝐵𝑅𝐷))))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 384   ∧ w3a 1036  ∀wal 1478   = wceq 1480   ∈ wcel 1987  ∀wral 2907   class class class wbr 4613   Po wpo 4993 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601 This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ral 2912  df-rab 2916  df-v 3188  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-nul 3892  df-if 4059  df-sn 4149  df-pr 4151  df-op 4155  df-br 4614  df-po 4995 This theorem is referenced by:  poirr  5006  potr  5007
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