Theorem swoord2 8770

Description: The incomparability equivalence relation is compatible with the original order. (Contributed by Mario Carneiro, 31-Dec-2014.)

Hypotheses

Ref	Expression
swoer.1	⊢ 𝑅 = ((𝑋 × 𝑋) ∖ ( < ∪ ◡ < ))
swoer.2	⊢ ((𝜑 ∧ (𝑦 ∈ 𝑋 ∧ 𝑧 ∈ 𝑋)) → (𝑦 < 𝑧 → ¬ 𝑧 < 𝑦))
swoer.3	⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋 ∧ 𝑧 ∈ 𝑋)) → (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦)))
swoord.4	⊢ (𝜑 → 𝐵 ∈ 𝑋)
swoord.5	⊢ (𝜑 → 𝐶 ∈ 𝑋)
swoord.6	⊢ (𝜑 → 𝐴𝑅𝐵)

Assertion

Ref	Expression
swoord2	⊢ (𝜑 → (𝐶 < 𝐴 ↔ 𝐶 < 𝐵))

Distinct variable groups:   𝑥,𝑦,𝑧, <   𝑥,𝐴,𝑦,𝑧   𝑥,𝐵,𝑦,𝑧   𝑥,𝐶,𝑦,𝑧   𝜑,𝑥,𝑦,𝑧   𝑥,𝑋,𝑦,𝑧

Allowed substitution hints:   𝑅(𝑥,𝑦,𝑧)

Proof of Theorem swoord2

Step	Hyp	Ref	Expression
1		id 22	. . . 4 ⊢ (𝜑 → 𝜑)
2		swoord.5	. . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑋)
3		swoord.6	. . . . 5 ⊢ (𝜑 → 𝐴𝑅𝐵)
4		swoer.1	. . . . . . 7 ⊢ 𝑅 = ((𝑋 × 𝑋) ∖ ( < ∪ ◡ < ))
5		difss 4138	. . . . . . 7 ⊢ ((𝑋 × 𝑋) ∖ ( < ∪ ◡ < )) ⊆ (𝑋 × 𝑋)
6	4, 5	eqsstri 4023	. . . . . 6 ⊢ 𝑅 ⊆ (𝑋 × 𝑋)
7	6	ssbri 5198	. . . . 5 ⊢ (𝐴𝑅𝐵 → 𝐴(𝑋 × 𝑋)𝐵)
8		df-br 5154	. . . . . 6 ⊢ (𝐴(𝑋 × 𝑋)𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋))
9		opelxp1 5725	. . . . . 6 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) → 𝐴 ∈ 𝑋)
10	8, 9	sylbi 216	. . . . 5 ⊢ (𝐴(𝑋 × 𝑋)𝐵 → 𝐴 ∈ 𝑋)
11	3, 7, 10	3syl 18	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑋)
12		swoord.4	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑋)
13		swoer.3	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋 ∧ 𝑧 ∈ 𝑋)) → (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦)))
14	13	swopolem 5605	. . . 4 ⊢ ((𝜑 ∧ (𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐶 < 𝐴 → (𝐶 < 𝐵 ∨ 𝐵 < 𝐴)))
15	1, 2, 11, 12, 14	syl13anc 1369	. . 3 ⊢ (𝜑 → (𝐶 < 𝐴 → (𝐶 < 𝐵 ∨ 𝐵 < 𝐴)))
16		idd 24	. . . 4 ⊢ (𝜑 → (𝐶 < 𝐵 → 𝐶 < 𝐵))
17	4	brdifun 8767	. . . . . . . 8 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝑅𝐵 ↔ ¬ (𝐴 < 𝐵 ∨ 𝐵 < 𝐴)))
18	11, 12, 17	syl2anc 582	. . . . . . 7 ⊢ (𝜑 → (𝐴𝑅𝐵 ↔ ¬ (𝐴 < 𝐵 ∨ 𝐵 < 𝐴)))
19	3, 18	mpbid 231	. . . . . 6 ⊢ (𝜑 → ¬ (𝐴 < 𝐵 ∨ 𝐵 < 𝐴))
20		olc 866	. . . . . 6 ⊢ (𝐵 < 𝐴 → (𝐴 < 𝐵 ∨ 𝐵 < 𝐴))
21	19, 20	nsyl 140	. . . . 5 ⊢ (𝜑 → ¬ 𝐵 < 𝐴)
22	21	pm2.21d 121	. . . 4 ⊢ (𝜑 → (𝐵 < 𝐴 → 𝐶 < 𝐵))
23	16, 22	jaod 857	. . 3 ⊢ (𝜑 → ((𝐶 < 𝐵 ∨ 𝐵 < 𝐴) → 𝐶 < 𝐵))
24	15, 23	syld 47	. 2 ⊢ (𝜑 → (𝐶 < 𝐴 → 𝐶 < 𝐵))
25	13	swopolem 5605	. . . 4 ⊢ ((𝜑 ∧ (𝐶 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋)) → (𝐶 < 𝐵 → (𝐶 < 𝐴 ∨ 𝐴 < 𝐵)))
26	1, 2, 12, 11, 25	syl13anc 1369	. . 3 ⊢ (𝜑 → (𝐶 < 𝐵 → (𝐶 < 𝐴 ∨ 𝐴 < 𝐵)))
27		idd 24	. . . 4 ⊢ (𝜑 → (𝐶 < 𝐴 → 𝐶 < 𝐴))
28		orc 865	. . . . . 6 ⊢ (𝐴 < 𝐵 → (𝐴 < 𝐵 ∨ 𝐵 < 𝐴))
29	19, 28	nsyl 140	. . . . 5 ⊢ (𝜑 → ¬ 𝐴 < 𝐵)
30	29	pm2.21d 121	. . . 4 ⊢ (𝜑 → (𝐴 < 𝐵 → 𝐶 < 𝐴))
31	27, 30	jaod 857	. . 3 ⊢ (𝜑 → ((𝐶 < 𝐴 ∨ 𝐴 < 𝐵) → 𝐶 < 𝐴))
32	26, 31	syld 47	. 2 ⊢ (𝜑 → (𝐶 < 𝐵 → 𝐶 < 𝐴))
33	24, 32	impbid 211	1 ⊢ (𝜑 → (𝐶 < 𝐴 ↔ 𝐶 < 𝐵))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 205   ∧ wa 394   ∨ wo 845   ∧ w3a 1084   = wceq 1534   ∈ wcel 2100   ∖ cdif 3953   ∪ cun 3954  ⟨cop 4639   class class class wbr 5153   × cxp 5681  ^◡ccnv 5682

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2102  ax-9 2110  ax-ext 2700  ax-sep 5304  ax-nul 5311  ax-pr 5434

This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1537  df-fal 1547  df-ex 1775  df-sb 2062  df-clab 2707  df-cleq 2721  df-clel 2806  df-ral 3055  df-rex 3064  df-rab 3428  df-v 3473  df-dif 3959  df-un 3961  df-ss 3973  df-nul 4333  df-if 4534  df-sn 4634  df-pr 4636  df-op 4640  df-br 5154  df-opab 5216  df-xp 5689  df-cnv 5691

This theorem is referenced by: (None)