Theorem swoord2 6582

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 19	. . . 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 3275	. . . . . . 7 ⊢ ((𝑋 × 𝑋) ∖ ( < ∪ ◡ < )) ⊆ (𝑋 × 𝑋)
6	4, 5	eqsstri 3201	. . . . . 6 ⊢ 𝑅 ⊆ (𝑋 × 𝑋)
7	6	ssbri 4061	. . . . 5 ⊢ (𝐴𝑅𝐵 → 𝐴(𝑋 × 𝑋)𝐵)
8		df-br 4018	. . . . . 6 ⊢ (𝐴(𝑋 × 𝑋)𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋))
9		opelxp1 4674	. . . . . 6 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) → 𝐴 ∈ 𝑋)
10	8, 9	sylbi 121	. . . . 5 ⊢ (𝐴(𝑋 × 𝑋)𝐵 → 𝐴 ∈ 𝑋)
11	3, 7, 10	3syl 17	. . . 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 4319	. . . 4 ⊢ ((𝜑 ∧ (𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐶 < 𝐴 → (𝐶 < 𝐵 ∨ 𝐵 < 𝐴)))
15	1, 2, 11, 12, 14	syl13anc 1250	. . 3 ⊢ (𝜑 → (𝐶 < 𝐴 → (𝐶 < 𝐵 ∨ 𝐵 < 𝐴)))
16		idd 21	. . . 4 ⊢ (𝜑 → (𝐶 < 𝐵 → 𝐶 < 𝐵))
17	4	brdifun 6579	. . . . . . . 8 ⊢ ((𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝑅𝐵 ↔ ¬ (𝐴 < 𝐵 ∨ 𝐵 < 𝐴)))
18	11, 12, 17	syl2anc 411	. . . . . . 7 ⊢ (𝜑 → (𝐴𝑅𝐵 ↔ ¬ (𝐴 < 𝐵 ∨ 𝐵 < 𝐴)))
19	3, 18	mpbid 147	. . . . . 6 ⊢ (𝜑 → ¬ (𝐴 < 𝐵 ∨ 𝐵 < 𝐴))
20		olc 712	. . . . . 6 ⊢ (𝐵 < 𝐴 → (𝐴 < 𝐵 ∨ 𝐵 < 𝐴))
21	19, 20	nsyl 629	. . . . 5 ⊢ (𝜑 → ¬ 𝐵 < 𝐴)
22	21	pm2.21d 620	. . . 4 ⊢ (𝜑 → (𝐵 < 𝐴 → 𝐶 < 𝐵))
23	16, 22	jaod 718	. . 3 ⊢ (𝜑 → ((𝐶 < 𝐵 ∨ 𝐵 < 𝐴) → 𝐶 < 𝐵))
24	15, 23	syld 45	. 2 ⊢ (𝜑 → (𝐶 < 𝐴 → 𝐶 < 𝐵))
25	13	swopolem 4319	. . . 4 ⊢ ((𝜑 ∧ (𝐶 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋)) → (𝐶 < 𝐵 → (𝐶 < 𝐴 ∨ 𝐴 < 𝐵)))
26	1, 2, 12, 11, 25	syl13anc 1250	. . 3 ⊢ (𝜑 → (𝐶 < 𝐵 → (𝐶 < 𝐴 ∨ 𝐴 < 𝐵)))
27		idd 21	. . . 4 ⊢ (𝜑 → (𝐶 < 𝐴 → 𝐶 < 𝐴))
28		orc 713	. . . . . 6 ⊢ (𝐴 < 𝐵 → (𝐴 < 𝐵 ∨ 𝐵 < 𝐴))
29	19, 28	nsyl 629	. . . . 5 ⊢ (𝜑 → ¬ 𝐴 < 𝐵)
30	29	pm2.21d 620	. . . 4 ⊢ (𝜑 → (𝐴 < 𝐵 → 𝐶 < 𝐴))
31	27, 30	jaod 718	. . 3 ⊢ (𝜑 → ((𝐶 < 𝐴 ∨ 𝐴 < 𝐵) → 𝐶 < 𝐴))
32	26, 31	syld 45	. 2 ⊢ (𝜑 → (𝐶 < 𝐵 → 𝐶 < 𝐴))
33	24, 32	impbid 129	1 ⊢ (𝜑 → (𝐶 < 𝐴 ↔ 𝐶 < 𝐵))

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 104   ↔ wb 105   ∨ wo 709   ∧ w3a 979   = wceq 1363   ∈ wcel 2159   ∖ cdif 3140   ∪ cun 3141  ⟨cop 3609   class class class wbr 4017   × cxp 4638  ^◡ccnv 4639

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1457  ax-7 1458  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-8 1514  ax-10 1515  ax-11 1516  ax-i12 1517  ax-bndl 1519  ax-4 1520  ax-17 1536  ax-i9 1540  ax-ial 1544  ax-i5r 1545  ax-14 2162  ax-ext 2170  ax-sep 4135  ax-pow 4188  ax-pr 4223

This theorem depends on definitions:  df-bi 117  df-3an 981  df-tru 1366  df-nf 1471  df-sb 1773  df-eu 2040  df-mo 2041  df-clab 2175  df-cleq 2181  df-clel 2184  df-nfc 2320  df-ral 2472  df-rex 2473  df-v 2753  df-dif 3145  df-un 3147  df-in 3149  df-ss 3156  df-pw 3591  df-sn 3612  df-pr 3613  df-op 3615  df-br 4018  df-opab 4079  df-xp 4646  df-cnv 4648

This theorem is referenced by: (None)