Theorem weiunfrlem 36975

Description: Lemma for weiunfr 36978. (Contributed by Matthew House, 23-Aug-2025.)

Hypotheses

Ref	Expression
weiun.1	⊢ 𝐹 = (𝑤 ∈ ∪ 𝑥 ∈ 𝐴 𝐵 ↦ (℩𝑢 ∈ {𝑥 ∈ 𝐴 ∣ 𝑤 ∈ 𝐵}∀𝑣 ∈ {𝑥 ∈ 𝐴 ∣ 𝑤 ∈ 𝐵} ¬ 𝑣𝑅𝑢))
weiun.2	⊢ 𝑇 = {⟨𝑦, 𝑧⟩ ∣ ((𝑦 ∈ ∪ 𝑥 ∈ 𝐴 𝐵 ∧ 𝑧 ∈ ∪ 𝑥 ∈ 𝐴 𝐵) ∧ ((𝐹‘𝑦)𝑅(𝐹‘𝑧) ∨ ((𝐹‘𝑦) = (𝐹‘𝑧) ∧ 𝑦⦋(𝐹‘𝑦) / 𝑥⦌𝑆𝑧)))}
weiunlem.3	⊢ (𝜑 → 𝑅 We 𝐴)
weiunlem.4	⊢ (𝜑 → 𝑅 Se 𝐴)
weiunfrlem.5	⊢ 𝐸 = (℩𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝)
weiunfrlem.6	⊢ (𝜑 → 𝑟 ⊆ ∪ 𝑥 ∈ 𝐴 𝐵)
weiunfrlem.7	⊢ (𝜑 → 𝑟 ≠ ∅)

Assertion

Ref	Expression
weiunfrlem	⊢ (𝜑 → (𝐸 ∈ (𝐹 “ 𝑟) ∧ ∀𝑡 ∈ 𝑟 ¬ (𝐹‘𝑡)𝑅𝐸 ∧ ∀𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)(𝐹‘𝑡) = 𝐸))

Distinct variable groups:   𝜑,𝑡   𝐴,𝑝,𝑞,𝑟,𝑡,𝑢,𝑣,𝑤,𝑥   𝑦,𝐴,𝑧,𝑥   𝐵,𝑝,𝑞,𝑟,𝑡,𝑢,𝑣,𝑤   𝑦,𝐵,𝑧   𝑡,𝐸   𝐹,𝑝,𝑞,𝑟,𝑡,𝑦,𝑧   𝑅,𝑝,𝑞,𝑟,𝑡,𝑢,𝑣,𝑤   𝑦,𝑅,𝑧   𝑆,𝑝,𝑞,𝑟,𝑡,𝑦,𝑧   𝑇,𝑝,𝑞,𝑟

Allowed substitution hints:   𝜑(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢,𝑟,𝑞,𝑝)   𝐵(𝑥)   𝑅(𝑥)   𝑆(𝑥,𝑤,𝑣,𝑢)   𝑇(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢,𝑡)   𝐸(𝑥,𝑦,𝑧,𝑤,𝑣,𝑢,𝑟,𝑞,𝑝)   𝐹(𝑥,𝑤,𝑣,𝑢)

Proof of Theorem weiunfrlem

Dummy variables 𝑛 𝑜 𝑠 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		weiunlem.3	. . . . . . 7 ⊢ (𝜑 → 𝑅 We 𝐴)
2		weiunlem.4	. . . . . . 7 ⊢ (𝜑 → 𝑅 Se 𝐴)
3		weiun.1	. . . . . . . . . 10 ⊢ 𝐹 = (𝑤 ∈ ∪ 𝑥 ∈ 𝐴 𝐵 ↦ (℩𝑢 ∈ {𝑥 ∈ 𝐴 ∣ 𝑤 ∈ 𝐵}∀𝑣 ∈ {𝑥 ∈ 𝐴 ∣ 𝑤 ∈ 𝐵} ¬ 𝑣𝑅𝑢))
4		weiun.2	. . . . . . . . . 10 ⊢ 𝑇 = {⟨𝑦, 𝑧⟩ ∣ ((𝑦 ∈ ∪ 𝑥 ∈ 𝐴 𝐵 ∧ 𝑧 ∈ ∪ 𝑥 ∈ 𝐴 𝐵) ∧ ((𝐹‘𝑦)𝑅(𝐹‘𝑧) ∨ ((𝐹‘𝑦) = (𝐹‘𝑧) ∧ 𝑦⦋(𝐹‘𝑦) / 𝑥⦌𝑆𝑧)))}
5	3, 4, 1, 2	weiunlem 36974	. . . . . . . . 9 ⊢ (𝜑 → (𝐹:∪ 𝑥 ∈ 𝐴 𝐵⟶𝐴 ∧ ∀𝑡 ∈ ∪ 𝑥 ∈ 𝐴 𝐵𝑡 ∈ ⦋(𝐹‘𝑡) / 𝑥⦌𝐵 ∧ ∀𝑠 ∈ 𝐴 ∀𝑡 ∈ ⦋ 𝑠 / 𝑥⦌𝐵 ¬ 𝑠𝑅(𝐹‘𝑡)))
6	5	simp1d 1160	. . . . . . . 8 ⊢ (𝜑 → 𝐹:∪ 𝑥 ∈ 𝐴 𝐵⟶𝐴)
7	6	fimassd 6727	. . . . . . 7 ⊢ (𝜑 → (𝐹 “ 𝑟) ⊆ 𝐴)
8		weiunfrlem.6	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑟 ⊆ ∪ 𝑥 ∈ 𝐴 𝐵)
9	6	fdmd 6716	. . . . . . . . . . 11 ⊢ (𝜑 → dom 𝐹 = ∪ 𝑥 ∈ 𝐴 𝐵)
10	8, 9	sseqtrrd 3974	. . . . . . . . . 10 ⊢ (𝜑 → 𝑟 ⊆ dom 𝐹)
11		sseqin2 4176	. . . . . . . . . 10 ⊢ (𝑟 ⊆ dom 𝐹 ↔ (dom 𝐹 ∩ 𝑟) = 𝑟)
12	10, 11	sylib 221	. . . . . . . . 9 ⊢ (𝜑 → (dom 𝐹 ∩ 𝑟) = 𝑟)
13		weiunfrlem.7	. . . . . . . . 9 ⊢ (𝜑 → 𝑟 ≠ ∅)
14	12, 13	eqnetrd 3025	. . . . . . . 8 ⊢ (𝜑 → (dom 𝐹 ∩ 𝑟) ≠ ∅)
15	14	imadisjlnd 6083	. . . . . . 7 ⊢ (𝜑 → (𝐹 “ 𝑟) ≠ ∅)
16		wereu2 5658	. . . . . . 7 ⊢ (((𝑅 We 𝐴 ∧ 𝑅 Se 𝐴) ∧ ((𝐹 “ 𝑟) ⊆ 𝐴 ∧ (𝐹 “ 𝑟) ≠ ∅)) → ∃!𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝)
17	1, 2, 7, 15, 16	syl22anc 851	. . . . . 6 ⊢ (𝜑 → ∃!𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝)
18		riotacl2 7383	. . . . . 6 ⊢ (∃!𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝 → (℩𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝) ∈ {𝑝 ∈ (𝐹 “ 𝑟) ∣ ∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝})
19	17, 18	syl 18	. . . . 5 ⊢ (𝜑 → (℩𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝) ∈ {𝑝 ∈ (𝐹 “ 𝑟) ∣ ∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝})
20		weiunfrlem.5	. . . . 5 ⊢ 𝐸 = (℩𝑝 ∈ (𝐹 “ 𝑟)∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝)
21		simpr 489	. . . . . . . . 9 ⊢ ((𝑛 = 𝑝 ∧ 𝑜 = 𝑞) → 𝑜 = 𝑞)
22		simpl 487	. . . . . . . . 9 ⊢ ((𝑛 = 𝑝 ∧ 𝑜 = 𝑞) → 𝑛 = 𝑝)
23	21, 22	breq12d 5122	. . . . . . . 8 ⊢ ((𝑛 = 𝑝 ∧ 𝑜 = 𝑞) → (𝑜𝑅𝑛 ↔ 𝑞𝑅𝑝))
24	23	notbid 321	. . . . . . 7 ⊢ ((𝑛 = 𝑝 ∧ 𝑜 = 𝑞) → (¬ 𝑜𝑅𝑛 ↔ ¬ 𝑞𝑅𝑝))
25	24	cbvraldva 3245	. . . . . 6 ⊢ (𝑛 = 𝑝 → (∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝑛 ↔ ∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝))
26	25	cbvrabv 3426	. . . . 5 ⊢ {𝑛 ∈ (𝐹 “ 𝑟) ∣ ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝑛} = {𝑝 ∈ (𝐹 “ 𝑟) ∣ ∀𝑞 ∈ (𝐹 “ 𝑟) ¬ 𝑞𝑅𝑝}
27	19, 20, 26	3eltr4g 2880	. . . 4 ⊢ (𝜑 → 𝐸 ∈ {𝑛 ∈ (𝐹 “ 𝑟) ∣ ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝑛})
28		breq2 5113	. . . . . . 7 ⊢ (𝑛 = 𝐸 → (𝑜𝑅𝑛 ↔ 𝑜𝑅𝐸))
29	28	notbid 321	. . . . . 6 ⊢ (𝑛 = 𝐸 → (¬ 𝑜𝑅𝑛 ↔ ¬ 𝑜𝑅𝐸))
30	29	ralbidv 3188	. . . . 5 ⊢ (𝑛 = 𝐸 → (∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝑛 ↔ ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝐸))
31	30	elrab 3650	. . . 4 ⊢ (𝐸 ∈ {𝑛 ∈ (𝐹 “ 𝑟) ∣ ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝑛} ↔ (𝐸 ∈ (𝐹 “ 𝑟) ∧ ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝐸))
32	27, 31	sylib 221	. . 3 ⊢ (𝜑 → (𝐸 ∈ (𝐹 “ 𝑟) ∧ ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝐸))
33	32	simpld 499	. 2 ⊢ (𝜑 → 𝐸 ∈ (𝐹 “ 𝑟))
34	32	simprd 500	. . 3 ⊢ (𝜑 → ∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝐸)
35	6	ffnd 6706	. . . 4 ⊢ (𝜑 → 𝐹 Fn ∪ 𝑥 ∈ 𝐴 𝐵)
36		breq1 5112	. . . . . 6 ⊢ (𝑜 = (𝐹‘𝑡) → (𝑜𝑅𝐸 ↔ (𝐹‘𝑡)𝑅𝐸))
37	36	notbid 321	. . . . 5 ⊢ (𝑜 = (𝐹‘𝑡) → (¬ 𝑜𝑅𝐸 ↔ ¬ (𝐹‘𝑡)𝑅𝐸))
38	37	ralima 7235	. . . 4 ⊢ ((𝐹 Fn ∪ 𝑥 ∈ 𝐴 𝐵 ∧ 𝑟 ⊆ ∪ 𝑥 ∈ 𝐴 𝐵) → (∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝐸 ↔ ∀𝑡 ∈ 𝑟 ¬ (𝐹‘𝑡)𝑅𝐸))
39	35, 8, 38	syl2anc 595	. . 3 ⊢ (𝜑 → (∀𝑜 ∈ (𝐹 “ 𝑟) ¬ 𝑜𝑅𝐸 ↔ ∀𝑡 ∈ 𝑟 ¬ (𝐹‘𝑡)𝑅𝐸))
40	34, 39	mpbid 235	. 2 ⊢ (𝜑 → ∀𝑡 ∈ 𝑟 ¬ (𝐹‘𝑡)𝑅𝐸)
41		simpr 489	. . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵))
42	41	elin1d 4157	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝑡 ∈ 𝑟)
43		rspa 3254	. . . . 5 ⊢ ((∀𝑡 ∈ 𝑟 ¬ (𝐹‘𝑡)𝑅𝐸 ∧ 𝑡 ∈ 𝑟) → ¬ (𝐹‘𝑡)𝑅𝐸)
44	40, 42, 43	syl2an2r 697	. . . 4 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → ¬ (𝐹‘𝑡)𝑅𝐸)
45		csbeq1 3856	. . . . . . 7 ⊢ (𝑠 = 𝐸 → ⦋𝑠 / 𝑥⦌𝐵 = ⦋𝐸 / 𝑥⦌𝐵)
46		breq1 5112	. . . . . . . 8 ⊢ (𝑠 = 𝐸 → (𝑠𝑅(𝐹‘𝑡) ↔ 𝐸𝑅(𝐹‘𝑡)))
47	46	notbid 321	. . . . . . 7 ⊢ (𝑠 = 𝐸 → (¬ 𝑠𝑅(𝐹‘𝑡) ↔ ¬ 𝐸𝑅(𝐹‘𝑡)))
48	45, 47	raleqbidv 3338	. . . . . 6 ⊢ (𝑠 = 𝐸 → (∀𝑡 ∈ ⦋ 𝑠 / 𝑥⦌𝐵 ¬ 𝑠𝑅(𝐹‘𝑡) ↔ ∀𝑡 ∈ ⦋ 𝐸 / 𝑥⦌𝐵 ¬ 𝐸𝑅(𝐹‘𝑡)))
49	5	simp3d 1162	. . . . . 6 ⊢ (𝜑 → ∀𝑠 ∈ 𝐴 ∀𝑡 ∈ ⦋ 𝑠 / 𝑥⦌𝐵 ¬ 𝑠𝑅(𝐹‘𝑡))
50	7, 33	sseldd 3938	. . . . . 6 ⊢ (𝜑 → 𝐸 ∈ 𝐴)
51	48, 49, 50	rspcdva 3582	. . . . 5 ⊢ (𝜑 → ∀𝑡 ∈ ⦋ 𝐸 / 𝑥⦌𝐵 ¬ 𝐸𝑅(𝐹‘𝑡))
52	41	elin2d 4158	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝑡 ∈ ⦋𝐸 / 𝑥⦌𝐵)
53		rspa 3254	. . . . 5 ⊢ ((∀𝑡 ∈ ⦋ 𝐸 / 𝑥⦌𝐵 ¬ 𝐸𝑅(𝐹‘𝑡) ∧ 𝑡 ∈ ⦋𝐸 / 𝑥⦌𝐵) → ¬ 𝐸𝑅(𝐹‘𝑡))
54	51, 52, 53	syl2an2r 697	. . . 4 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → ¬ 𝐸𝑅(𝐹‘𝑡))
55		weso 5652	. . . . . . 7 ⊢ (𝑅 We 𝐴 → 𝑅 Or 𝐴)
56	1, 55	syl 18	. . . . . 6 ⊢ (𝜑 → 𝑅 Or 𝐴)
57	56	adantr 485	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝑅 Or 𝐴)
58	6	adantr 485	. . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝐹:∪ 𝑥 ∈ 𝐴 𝐵⟶𝐴)
59	8	adantr 485	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝑟 ⊆ ∪ 𝑥 ∈ 𝐴 𝐵)
60	59, 42	sseldd 3938	. . . . . 6 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝑡 ∈ ∪ 𝑥 ∈ 𝐴 𝐵)
61	58, 60	ffvelcdmd 7080	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → (𝐹‘𝑡) ∈ 𝐴)
62	50	adantr 485	. . . . 5 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → 𝐸 ∈ 𝐴)
63		sotrieq2 5601	. . . . 5 ⊢ ((𝑅 Or 𝐴 ∧ ((𝐹‘𝑡) ∈ 𝐴 ∧ 𝐸 ∈ 𝐴)) → ((𝐹‘𝑡) = 𝐸 ↔ (¬ (𝐹‘𝑡)𝑅𝐸 ∧ ¬ 𝐸𝑅(𝐹‘𝑡))))
64	57, 61, 62, 63	syl12anc 849	. . . 4 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → ((𝐹‘𝑡) = 𝐸 ↔ (¬ (𝐹‘𝑡)𝑅𝐸 ∧ ¬ 𝐸𝑅(𝐹‘𝑡))))
65	44, 54, 64	mpbir2and 725	. . 3 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)) → (𝐹‘𝑡) = 𝐸)
66	65	ralrimiva 3157	. 2 ⊢ (𝜑 → ∀𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)(𝐹‘𝑡) = 𝐸)
67	33, 40, 66	3jca 1146	1 ⊢ (𝜑 → (𝐸 ∈ (𝐹 “ 𝑟) ∧ ∀𝑡 ∈ 𝑟 ¬ (𝐹‘𝑡)𝑅𝐸 ∧ ∀𝑡 ∈ (𝑟 ∩ ⦋𝐸 / 𝑥⦌𝐵)(𝐹‘𝑡) = 𝐸))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 400   ∨ wo 860   ∧ w3a 1103   = wceq 1570   ∈ wcel 2143   ≠ wne 2958  ∀wral 3079  ∃!wreu 3367  {crab 3416  ⦋csb 3853   ∩ cin 3904   ⊆ wss 3905  ∅c0 4286  ∪ ciun 4956   class class class wbr 5109  {copab 5173   ↦ cmpt 5192   Or wor 5568   Se wse 5612   We wwe 5613  dom cdm 5661   “ cima 5664   Fn wfn 6531  ⟶wf 6532  ‘cfv 6536  ℩crio 7366

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5257  ax-nul 5269  ax-pr 5404

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-pw 4564  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-iun 4958  df-br 5110  df-opab 5174  df-mpt 5193  df-id 5556  df-po 5569  df-so 5570  df-fr 5614  df-se 5615  df-we 5616  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-fv 6544  df-riota 7367

This theorem is referenced by:  weiunfr  36978