Theorem sotritrieq 4310

Description: A trichotomy relationship, given a trichotomous order. (Contributed by Jim Kingdon, 13-Dec-2019.)

Hypotheses

Ref	Expression
sotritric.or	⊢ 𝑅 Or 𝐴
sotritric.tri	⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → (𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵))

Assertion

Ref	Expression
sotritrieq	⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → (𝐵 = 𝐶 ↔ ¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))

Proof of Theorem sotritrieq

Step	Hyp	Ref	Expression
1		sotritric.or	. . . . . . 7 ⊢ 𝑅 Or 𝐴
2		sonr 4302	. . . . . . 7 ⊢ ((𝑅 Or 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵)
3	1, 2	mpan 422	. . . . . 6 ⊢ (𝐵 ∈ 𝐴 → ¬ 𝐵𝑅𝐵)
4		breq2 3993	. . . . . . 7 ⊢ (𝐵 = 𝐶 → (𝐵𝑅𝐵 ↔ 𝐵𝑅𝐶))
5	4	notbid 662	. . . . . 6 ⊢ (𝐵 = 𝐶 → (¬ 𝐵𝑅𝐵 ↔ ¬ 𝐵𝑅𝐶))
6	3, 5	syl5ibcom 154	. . . . 5 ⊢ (𝐵 ∈ 𝐴 → (𝐵 = 𝐶 → ¬ 𝐵𝑅𝐶))
7		breq1 3992	. . . . . . 7 ⊢ (𝐵 = 𝐶 → (𝐵𝑅𝐵 ↔ 𝐶𝑅𝐵))
8	7	notbid 662	. . . . . 6 ⊢ (𝐵 = 𝐶 → (¬ 𝐵𝑅𝐵 ↔ ¬ 𝐶𝑅𝐵))
9	3, 8	syl5ibcom 154	. . . . 5 ⊢ (𝐵 ∈ 𝐴 → (𝐵 = 𝐶 → ¬ 𝐶𝑅𝐵))
10	6, 9	jcad 305	. . . 4 ⊢ (𝐵 ∈ 𝐴 → (𝐵 = 𝐶 → (¬ 𝐵𝑅𝐶 ∧ ¬ 𝐶𝑅𝐵)))
11		ioran 747	. . . 4 ⊢ (¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵) ↔ (¬ 𝐵𝑅𝐶 ∧ ¬ 𝐶𝑅𝐵))
12	10, 11	syl6ibr 161	. . 3 ⊢ (𝐵 ∈ 𝐴 → (𝐵 = 𝐶 → ¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))
13	12	adantr 274	. 2 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → (𝐵 = 𝐶 → ¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))
14		sotritric.tri	. . 3 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → (𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵))
15		3orrot 979	. . . . . . 7 ⊢ ((𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵) ↔ (𝐵 = 𝐶 ∨ 𝐶𝑅𝐵 ∨ 𝐵𝑅𝐶))
16		3orcomb 982	. . . . . . 7 ⊢ ((𝐵 = 𝐶 ∨ 𝐶𝑅𝐵 ∨ 𝐵𝑅𝐶) ↔ (𝐵 = 𝐶 ∨ 𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵))
17		3orass 976	. . . . . . 7 ⊢ ((𝐵 = 𝐶 ∨ 𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵) ↔ (𝐵 = 𝐶 ∨ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))
18	15, 16, 17	3bitri 205	. . . . . 6 ⊢ ((𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵) ↔ (𝐵 = 𝐶 ∨ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))
19	18	biimpi 119	. . . . 5 ⊢ ((𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵) → (𝐵 = 𝐶 ∨ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))
20	19	orcomd 724	. . . 4 ⊢ ((𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵) → ((𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵) ∨ 𝐵 = 𝐶))
21	20	ord 719	. . 3 ⊢ ((𝐵𝑅𝐶 ∨ 𝐵 = 𝐶 ∨ 𝐶𝑅𝐵) → (¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵) → 𝐵 = 𝐶))
22	14, 21	syl 14	. 2 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → (¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵) → 𝐵 = 𝐶))
23	13, 22	impbid 128	1 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴) → (𝐵 = 𝐶 ↔ ¬ (𝐵𝑅𝐶 ∨ 𝐶𝑅𝐵)))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 103   ↔ wb 104   ∨ wo 703   ∨ w3o 972   = wceq 1348   ∈ wcel 2141   class class class wbr 3989   Or wor 4280

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-3or 974  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-v 2732  df-un 3125  df-sn 3589  df-pr 3590  df-op 3592  df-br 3990  df-po 4281  df-iso 4282

This theorem is referenced by:  distrlem4prl  7546  distrlem4pru  7547