Theorem fnwe2lem3 43093

Description: Lemma for fnwe2 43094. Trichotomy. (Contributed by Stefan O'Rear, 19-Jan-2015.)

Hypotheses

Ref	Expression
fnwe2.su	⊢ (𝑧 = (𝐹‘𝑥) → 𝑆 = 𝑈)
fnwe2.t	⊢ 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ((𝐹‘𝑥)𝑅(𝐹‘𝑦) ∨ ((𝐹‘𝑥) = (𝐹‘𝑦) ∧ 𝑥𝑈𝑦))}
fnwe2.s	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑈 We {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑥)})
fnwe2.f	⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴⟶𝐵)
fnwe2.r	⊢ (𝜑 → 𝑅 We 𝐵)
fnwe2lem3.a	⊢ (𝜑 → 𝑎 ∈ 𝐴)
fnwe2lem3.b	⊢ (𝜑 → 𝑏 ∈ 𝐴)

Assertion

Ref	Expression
fnwe2lem3	⊢ (𝜑 → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))

Distinct variable groups:   𝑦,𝑈,𝑧,𝑎,𝑏   𝑥,𝑆,𝑦,𝑎,𝑏   𝑥,𝑅,𝑦,𝑎,𝑏   𝜑,𝑥,𝑦,𝑧   𝑥,𝐴,𝑦,𝑧,𝑎,𝑏   𝑥,𝐹,𝑦,𝑧,𝑎,𝑏   𝑇,𝑎,𝑏   𝐵,𝑎,𝑏

Allowed substitution hints:   𝜑(𝑎,𝑏)   𝐵(𝑥,𝑦,𝑧)   𝑅(𝑧)   𝑆(𝑧)   𝑇(𝑥,𝑦,𝑧)   𝑈(𝑥)

Proof of Theorem fnwe2lem3

Step	Hyp	Ref	Expression
1		animorrl 982	. . . 4 ⊢ ((𝜑 ∧ (𝐹‘𝑎)𝑅(𝐹‘𝑏)) → ((𝐹‘𝑎)𝑅(𝐹‘𝑏) ∨ ((𝐹‘𝑎) = (𝐹‘𝑏) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏)))
2		fnwe2.su	. . . . 5 ⊢ (𝑧 = (𝐹‘𝑥) → 𝑆 = 𝑈)
3		fnwe2.t	. . . . 5 ⊢ 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ((𝐹‘𝑥)𝑅(𝐹‘𝑦) ∨ ((𝐹‘𝑥) = (𝐹‘𝑦) ∧ 𝑥𝑈𝑦))}
4	2, 3	fnwe2val 43090	. . . 4 ⊢ (𝑎𝑇𝑏 ↔ ((𝐹‘𝑎)𝑅(𝐹‘𝑏) ∨ ((𝐹‘𝑎) = (𝐹‘𝑏) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏)))
5	1, 4	sylibr 234	. . 3 ⊢ ((𝜑 ∧ (𝐹‘𝑎)𝑅(𝐹‘𝑏)) → 𝑎𝑇𝑏)
6	5	3mix1d 1337	. 2 ⊢ ((𝜑 ∧ (𝐹‘𝑎)𝑅(𝐹‘𝑏)) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
7		simplr 768	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏) → (𝐹‘𝑎) = (𝐹‘𝑏))
8		simpr 484	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏) → 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏)
9	7, 8	jca 511	. . . . . 6 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏) → ((𝐹‘𝑎) = (𝐹‘𝑏) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏))
10	9	olcd 874	. . . . 5 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏) → ((𝐹‘𝑎)𝑅(𝐹‘𝑏) ∨ ((𝐹‘𝑎) = (𝐹‘𝑏) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏)))
11	10, 4	sylibr 234	. . . 4 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏) → 𝑎𝑇𝑏)
12	11	3mix1d 1337	. . 3 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
13		3mix2 1332	. . . 4 ⊢ (𝑎 = 𝑏 → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
14	13	adantl 481	. . 3 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑎 = 𝑏) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
15		simplr 768	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → (𝐹‘𝑎) = (𝐹‘𝑏))
16	15	eqcomd 2737	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → (𝐹‘𝑏) = (𝐹‘𝑎))
17		csbeq1 3848	. . . . . . . . . 10 ⊢ ((𝐹‘𝑎) = (𝐹‘𝑏) → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 = ⦋(𝐹‘𝑏) / 𝑧⦌𝑆)
18	17	adantl 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 = ⦋(𝐹‘𝑏) / 𝑧⦌𝑆)
19	18	breqd 5100	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → (𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎 ↔ 𝑏⦋(𝐹‘𝑏) / 𝑧⦌𝑆𝑎))
20	19	biimpa 476	. . . . . . 7 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → 𝑏⦋(𝐹‘𝑏) / 𝑧⦌𝑆𝑎)
21	16, 20	jca 511	. . . . . 6 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → ((𝐹‘𝑏) = (𝐹‘𝑎) ∧ 𝑏⦋(𝐹‘𝑏) / 𝑧⦌𝑆𝑎))
22	21	olcd 874	. . . . 5 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → ((𝐹‘𝑏)𝑅(𝐹‘𝑎) ∨ ((𝐹‘𝑏) = (𝐹‘𝑎) ∧ 𝑏⦋(𝐹‘𝑏) / 𝑧⦌𝑆𝑎)))
23	2, 3	fnwe2val 43090	. . . . 5 ⊢ (𝑏𝑇𝑎 ↔ ((𝐹‘𝑏)𝑅(𝐹‘𝑎) ∨ ((𝐹‘𝑏) = (𝐹‘𝑎) ∧ 𝑏⦋(𝐹‘𝑏) / 𝑧⦌𝑆𝑎)))
24	22, 23	sylibr 234	. . . 4 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → 𝑏𝑇𝑎)
25	24	3mix3d 1339	. . 3 ⊢ (((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) ∧ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
26		fnwe2lem3.a	. . . . . . 7 ⊢ (𝜑 → 𝑎 ∈ 𝐴)
27		fnwe2.s	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑈 We {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑥)})
28	2, 3, 27	fnwe2lem1 43091	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐴) → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 We {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
29	26, 28	mpdan 687	. . . . . 6 ⊢ (𝜑 → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 We {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
30		weso 5605	. . . . . 6 ⊢ (⦋(𝐹‘𝑎) / 𝑧⦌𝑆 We {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)} → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 Or {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
31	29, 30	syl 17	. . . . 5 ⊢ (𝜑 → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 Or {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
32	31	adantr 480	. . . 4 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → ⦋(𝐹‘𝑎) / 𝑧⦌𝑆 Or {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
33		fveqeq2 6831	. . . . 5 ⊢ (𝑦 = 𝑎 → ((𝐹‘𝑦) = (𝐹‘𝑎) ↔ (𝐹‘𝑎) = (𝐹‘𝑎)))
34	26	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → 𝑎 ∈ 𝐴)
35		eqidd 2732	. . . . 5 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → (𝐹‘𝑎) = (𝐹‘𝑎))
36	33, 34, 35	elrabd 3644	. . . 4 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → 𝑎 ∈ {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
37		fveqeq2 6831	. . . . 5 ⊢ (𝑦 = 𝑏 → ((𝐹‘𝑦) = (𝐹‘𝑎) ↔ (𝐹‘𝑏) = (𝐹‘𝑎)))
38		fnwe2lem3.b	. . . . . 6 ⊢ (𝜑 → 𝑏 ∈ 𝐴)
39	38	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → 𝑏 ∈ 𝐴)
40		simpr 484	. . . . . 6 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → (𝐹‘𝑎) = (𝐹‘𝑏))
41	40	eqcomd 2737	. . . . 5 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → (𝐹‘𝑏) = (𝐹‘𝑎))
42	37, 39, 41	elrabd 3644	. . . 4 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → 𝑏 ∈ {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})
43		solin 5549	. . . 4 ⊢ ((⦋(𝐹‘𝑎) / 𝑧⦌𝑆 Or {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)} ∧ (𝑎 ∈ {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)} ∧ 𝑏 ∈ {𝑦 ∈ 𝐴 ∣ (𝐹‘𝑦) = (𝐹‘𝑎)})) → (𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎))
44	32, 36, 42, 43	syl12anc 836	. . 3 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → (𝑎⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏⦋(𝐹‘𝑎) / 𝑧⦌𝑆𝑎))
45	12, 14, 25, 44	mpjao3dan 1434	. 2 ⊢ ((𝜑 ∧ (𝐹‘𝑎) = (𝐹‘𝑏)) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
46		animorrl 982	. . . 4 ⊢ ((𝜑 ∧ (𝐹‘𝑏)𝑅(𝐹‘𝑎)) → ((𝐹‘𝑏)𝑅(𝐹‘𝑎) ∨ ((𝐹‘𝑏) = (𝐹‘𝑎) ∧ 𝑏⦋(𝐹‘𝑏) / 𝑧⦌𝑆𝑎)))
47	46, 23	sylibr 234	. . 3 ⊢ ((𝜑 ∧ (𝐹‘𝑏)𝑅(𝐹‘𝑎)) → 𝑏𝑇𝑎)
48	47	3mix3d 1339	. 2 ⊢ ((𝜑 ∧ (𝐹‘𝑏)𝑅(𝐹‘𝑎)) → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))
49		fnwe2.r	. . . 4 ⊢ (𝜑 → 𝑅 We 𝐵)
50		weso 5605	. . . 4 ⊢ (𝑅 We 𝐵 → 𝑅 Or 𝐵)
51	49, 50	syl 17	. . 3 ⊢ (𝜑 → 𝑅 Or 𝐵)
52	26	fvresd 6842	. . . 4 ⊢ (𝜑 → ((𝐹 ↾ 𝐴)‘𝑎) = (𝐹‘𝑎))
53		fnwe2.f	. . . . 5 ⊢ (𝜑 → (𝐹 ↾ 𝐴):𝐴⟶𝐵)
54	53, 26	ffvelcdmd 7018	. . . 4 ⊢ (𝜑 → ((𝐹 ↾ 𝐴)‘𝑎) ∈ 𝐵)
55	52, 54	eqeltrrd 2832	. . 3 ⊢ (𝜑 → (𝐹‘𝑎) ∈ 𝐵)
56	38	fvresd 6842	. . . 4 ⊢ (𝜑 → ((𝐹 ↾ 𝐴)‘𝑏) = (𝐹‘𝑏))
57	53, 38	ffvelcdmd 7018	. . . 4 ⊢ (𝜑 → ((𝐹 ↾ 𝐴)‘𝑏) ∈ 𝐵)
58	56, 57	eqeltrrd 2832	. . 3 ⊢ (𝜑 → (𝐹‘𝑏) ∈ 𝐵)
59		solin 5549	. . 3 ⊢ ((𝑅 Or 𝐵 ∧ ((𝐹‘𝑎) ∈ 𝐵 ∧ (𝐹‘𝑏) ∈ 𝐵)) → ((𝐹‘𝑎)𝑅(𝐹‘𝑏) ∨ (𝐹‘𝑎) = (𝐹‘𝑏) ∨ (𝐹‘𝑏)𝑅(𝐹‘𝑎)))
60	51, 55, 58, 59	syl12anc 836	. 2 ⊢ (𝜑 → ((𝐹‘𝑎)𝑅(𝐹‘𝑏) ∨ (𝐹‘𝑎) = (𝐹‘𝑏) ∨ (𝐹‘𝑏)𝑅(𝐹‘𝑎)))
61	6, 45, 48, 60	mpjao3dan 1434	1 ⊢ (𝜑 → (𝑎𝑇𝑏 ∨ 𝑎 = 𝑏 ∨ 𝑏𝑇𝑎))

Syntax hints:   → wi 4   ∧ wa 395   ∨ wo 847   ∨ w3o 1085   = wceq 1541   ∈ wcel 2111  {crab 3395  ⦋csb 3845   class class class wbr 5089  {copab 5151   Or wor 5521   We wwe 5566   ↾ cres 5616  ⟶wf 6477  ‘cfv 6481

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-12 2180  ax-ext 2703  ax-sep 5232  ax-nul 5242  ax-pr 5368

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-ne 2929  df-ral 3048  df-rex 3057  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-nul 4281  df-if 4473  df-sn 4574  df-pr 4576  df-op 4580  df-uni 4857  df-br 5090  df-opab 5152  df-id 5509  df-po 5522  df-so 5523  df-fr 5567  df-we 5569  df-xp 5620  df-rel 5621  df-cnv 5622  df-co 5623  df-dm 5624  df-rn 5625  df-res 5626  df-iota 6437  df-fun 6483  df-fn 6484  df-f 6485  df-fv 6489

This theorem is referenced by:  fnwe2  43094