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Theorem sowlin 4085
 Description: A strict order relation satisfies weak linearity. (Contributed by Jim Kingdon, 6-Oct-2018.)
Assertion
Ref Expression
sowlin ((𝑅 Or 𝐴 ∧ (𝐵𝐴𝐶𝐴𝐷𝐴)) → (𝐵𝑅𝐶 → (𝐵𝑅𝐷𝐷𝑅𝐶)))

Proof of Theorem sowlin
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 breq1 3795 . . . . 5 (𝑥 = 𝐵 → (𝑥𝑅𝑦𝐵𝑅𝑦))
2 breq1 3795 . . . . . 6 (𝑥 = 𝐵 → (𝑥𝑅𝑧𝐵𝑅𝑧))
32orbi1d 715 . . . . 5 (𝑥 = 𝐵 → ((𝑥𝑅𝑧𝑧𝑅𝑦) ↔ (𝐵𝑅𝑧𝑧𝑅𝑦)))
41, 3imbi12d 227 . . . 4 (𝑥 = 𝐵 → ((𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)) ↔ (𝐵𝑅𝑦 → (𝐵𝑅𝑧𝑧𝑅𝑦))))
54imbi2d 223 . . 3 (𝑥 = 𝐵 → ((𝑅 Or 𝐴 → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))) ↔ (𝑅 Or 𝐴 → (𝐵𝑅𝑦 → (𝐵𝑅𝑧𝑧𝑅𝑦)))))
6 breq2 3796 . . . . 5 (𝑦 = 𝐶 → (𝐵𝑅𝑦𝐵𝑅𝐶))
7 breq2 3796 . . . . . 6 (𝑦 = 𝐶 → (𝑧𝑅𝑦𝑧𝑅𝐶))
87orbi2d 714 . . . . 5 (𝑦 = 𝐶 → ((𝐵𝑅𝑧𝑧𝑅𝑦) ↔ (𝐵𝑅𝑧𝑧𝑅𝐶)))
96, 8imbi12d 227 . . . 4 (𝑦 = 𝐶 → ((𝐵𝑅𝑦 → (𝐵𝑅𝑧𝑧𝑅𝑦)) ↔ (𝐵𝑅𝐶 → (𝐵𝑅𝑧𝑧𝑅𝐶))))
109imbi2d 223 . . 3 (𝑦 = 𝐶 → ((𝑅 Or 𝐴 → (𝐵𝑅𝑦 → (𝐵𝑅𝑧𝑧𝑅𝑦))) ↔ (𝑅 Or 𝐴 → (𝐵𝑅𝐶 → (𝐵𝑅𝑧𝑧𝑅𝐶)))))
11 breq2 3796 . . . . . 6 (𝑧 = 𝐷 → (𝐵𝑅𝑧𝐵𝑅𝐷))
12 breq1 3795 . . . . . 6 (𝑧 = 𝐷 → (𝑧𝑅𝐶𝐷𝑅𝐶))
1311, 12orbi12d 717 . . . . 5 (𝑧 = 𝐷 → ((𝐵𝑅𝑧𝑧𝑅𝐶) ↔ (𝐵𝑅𝐷𝐷𝑅𝐶)))
1413imbi2d 223 . . . 4 (𝑧 = 𝐷 → ((𝐵𝑅𝐶 → (𝐵𝑅𝑧𝑧𝑅𝐶)) ↔ (𝐵𝑅𝐶 → (𝐵𝑅𝐷𝐷𝑅𝐶))))
1514imbi2d 223 . . 3 (𝑧 = 𝐷 → ((𝑅 Or 𝐴 → (𝐵𝑅𝐶 → (𝐵𝑅𝑧𝑧𝑅𝐶))) ↔ (𝑅 Or 𝐴 → (𝐵𝑅𝐶 → (𝐵𝑅𝐷𝐷𝑅𝐶)))))
16 df-iso 4062 . . . . 5 (𝑅 Or 𝐴 ↔ (𝑅 Po 𝐴 ∧ ∀𝑥𝐴𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
17 3anass 900 . . . . . . 7 ((𝑥𝐴𝑦𝐴𝑧𝐴) ↔ (𝑥𝐴 ∧ (𝑦𝐴𝑧𝐴)))
18 rsp 2386 . . . . . . . . 9 (∀𝑥𝐴𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)) → (𝑥𝐴 → ∀𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
19 rsp2 2388 . . . . . . . . 9 (∀𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)) → ((𝑦𝐴𝑧𝐴) → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
2018, 19syl6 33 . . . . . . . 8 (∀𝑥𝐴𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)) → (𝑥𝐴 → ((𝑦𝐴𝑧𝐴) → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)))))
2120impd 246 . . . . . . 7 (∀𝑥𝐴𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)) → ((𝑥𝐴 ∧ (𝑦𝐴𝑧𝐴)) → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
2217, 21syl5bi 145 . . . . . 6 (∀𝑥𝐴𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦)) → ((𝑥𝐴𝑦𝐴𝑧𝐴) → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
2322adantl 266 . . . . 5 ((𝑅 Po 𝐴 ∧ ∀𝑥𝐴𝑦𝐴𝑧𝐴 (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))) → ((𝑥𝐴𝑦𝐴𝑧𝐴) → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
2416, 23sylbi 118 . . . 4 (𝑅 Or 𝐴 → ((𝑥𝐴𝑦𝐴𝑧𝐴) → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
2524com12 30 . . 3 ((𝑥𝐴𝑦𝐴𝑧𝐴) → (𝑅 Or 𝐴 → (𝑥𝑅𝑦 → (𝑥𝑅𝑧𝑧𝑅𝑦))))
265, 10, 15, 25vtocl3ga 2640 . 2 ((𝐵𝐴𝐶𝐴𝐷𝐴) → (𝑅 Or 𝐴 → (𝐵𝑅𝐶 → (𝐵𝑅𝐷𝐷𝑅𝐶))))
2726impcom 120 1 ((𝑅 Or 𝐴 ∧ (𝐵𝐴𝐶𝐴𝐷𝐴)) → (𝐵𝑅𝐶 → (𝐵𝑅𝐷𝐷𝑅𝐶)))
 Colors of variables: wff set class Syntax hints:   → wi 4   ∧ wa 101   ∨ wo 639   ∧ w3a 896   = wceq 1259   ∈ wcel 1409  ∀wral 2323   class class class wbr 3792   Po wpo 4059   Or wor 4060 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-io 640  ax-5 1352  ax-7 1353  ax-gen 1354  ax-ie1 1398  ax-ie2 1399  ax-8 1411  ax-10 1412  ax-11 1413  ax-i12 1414  ax-bndl 1415  ax-4 1416  ax-17 1435  ax-i9 1439  ax-ial 1443  ax-i5r 1444  ax-ext 2038 This theorem depends on definitions:  df-bi 114  df-3an 898  df-tru 1262  df-nf 1366  df-sb 1662  df-clab 2043  df-cleq 2049  df-clel 2052  df-nfc 2183  df-ral 2328  df-v 2576  df-un 2950  df-sn 3409  df-pr 3410  df-op 3412  df-br 3793  df-iso 4062 This theorem is referenced by:  sotri2  4750  sotri3  4751  addextpr  6777  cauappcvgprlemloc  6808  caucvgprlemloc  6831  caucvgprprlemloc  6859  caucvgprprlemaddq  6864  ltsosr  6907  axpre-ltwlin  7015  xrlelttr  8823  xrltletr  8824  xrletr  8825
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