iundjiun - Mathbox for Glauco Siliprandi

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Theorem iundjiun 39353

Description: Given a sequence 𝐸 of sets, a sequence 𝐹 of disjoint sets is built, such that the indexed union stays the same. As in the proof of Property 112C (d) of [Fremlin1] p. 16. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

**Hypotheses**
Ref	Expression
iundjiun.nph	⊢ Ⅎ𝑛𝜑
iundjiun.z	⊢ 𝑍 = (ℤ_≥‘𝑁)
iundjiun.e	⊢ (𝜑 → 𝐸:𝑍⟶𝑉)
iundjiun.f	⊢ 𝐹 = (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))

**Assertion**
Ref	Expression
iundjiun	⊢ (𝜑 → ((∀𝑚 ∈ 𝑍 ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) = ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) ∧ ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) ∧ Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛)))

Distinct variable groups: 𝑖,𝐸,𝑚,𝑛 𝑚,𝐹 𝑖,𝑁,𝑚,𝑛 𝑚,𝑍,𝑛 𝜑,𝑖,𝑚 Allowed substitution hints: 𝜑(𝑛) 𝐹(𝑖,𝑛) 𝑉(𝑖,𝑚,𝑛) 𝑍(𝑖)

Proof of Theorem iundjiun Dummy variables 𝑥 𝑘 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eliun 4460	. . . . . . . . 9 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) ↔ ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛))
2	1	biimpi 205	. . . . . . . 8 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛))
3	2	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛)) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛))
4		iundjiun.nph	. . . . . . . . 9 ⊢ Ⅎ𝑛𝜑
5		nfcv 2751	. . . . . . . . . 10 ⊢ Ⅎ𝑛𝑥
6		nfiu1 4486	. . . . . . . . . 10 ⊢ Ⅎ𝑛∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)
7	5, 6	nfel 2763	. . . . . . . . 9 ⊢ Ⅎ𝑛 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)
8		simp2 1055	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐹‘𝑛)) → 𝑛 ∈ (𝑁...𝑚))
9		simpl 472	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) → 𝜑)
10		elfzuz 12209	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑛 ∈ (ℤ_≥‘𝑁))
11		iundjiun.z	. . . . . . . . . . . . . . . . . 18 ⊢ 𝑍 = (ℤ_≥‘𝑁)
12	11	eqcomi 2619	. . . . . . . . . . . . . . . . 17 ⊢ (ℤ_≥‘𝑁) = 𝑍
13	10, 12	syl6eleq 2698	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑛 ∈ 𝑍)
14	13	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) → 𝑛 ∈ 𝑍)
15		simpr 476	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → 𝑛 ∈ 𝑍)
16		iundjiun.e	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝐸:𝑍⟶𝑉)
17	16	ffvelrnda 6267	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐸‘𝑛) ∈ 𝑉)
18		difexg 4735	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐸‘𝑛) ∈ 𝑉 → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ V)
19	17, 18	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ V)
20		iundjiun.f	. . . . . . . . . . . . . . . . . 18 ⊢ 𝐹 = (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))
21	20	fvmpt2 6200	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑛 ∈ 𝑍 ∧ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ V) → (𝐹‘𝑛) = ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))
22	15, 19, 21	syl2anc 691	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐹‘𝑛) = ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))
23		difssd 3700	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ⊆ (𝐸‘𝑛))
24	22, 23	eqsstrd 3602	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐹‘𝑛) ⊆ (𝐸‘𝑛))
25	9, 14, 24	syl2anc 691	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) → (𝐹‘𝑛) ⊆ (𝐸‘𝑛))
26	25	3adant3 1074	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐹‘𝑛)) → (𝐹‘𝑛) ⊆ (𝐸‘𝑛))
27		simp3 1056	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐹‘𝑛)) → 𝑥 ∈ (𝐹‘𝑛))
28	26, 27	sseldd 3569	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐹‘𝑛)) → 𝑥 ∈ (𝐸‘𝑛))
29		rspe 2986	. . . . . . . . . . . 12 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐸‘𝑛)) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐸‘𝑛))
30	8, 28, 29	syl2anc 691	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐹‘𝑛)) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐸‘𝑛))
31		eliun 4460	. . . . . . . . . . 11 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) ↔ ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐸‘𝑛))
32	30, 31	sylibr 223	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚) ∧ 𝑥 ∈ (𝐹‘𝑛)) → 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
33	32	3exp 1256	. . . . . . . . 9 ⊢ (𝜑 → (𝑛 ∈ (𝑁...𝑚) → (𝑥 ∈ (𝐹‘𝑛) → 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))))
34	4, 7, 33	rexlimd 3008	. . . . . . . 8 ⊢ (𝜑 → (∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛) → 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)))
35	34	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛)) → (∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛) → 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)))
36	3, 35	mpd 15	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛)) → 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
37	36	ralrimiva 2949	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛)𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
38		dfss3 3558	. . . . 5 ⊢ (∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) ⊆ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) ↔ ∀𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛)𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
39	37, 38	sylibr 223	. . . 4 ⊢ (𝜑 → ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) ⊆ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
40		fzssuz 12253	. . . . . . . . . . 11 ⊢ (𝑁...𝑚) ⊆ (ℤ_≥‘𝑁)
41	40	a1i 11	. . . . . . . . . 10 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) → (𝑁...𝑚) ⊆ (ℤ_≥‘𝑁))
42	31	biimpi 205	. . . . . . . . . 10 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐸‘𝑛))
43		nfv 1830	. . . . . . . . . . 11 ⊢ Ⅎ𝑛 𝑥 ∈ (𝐸‘𝑖)
44		fveq2 6103	. . . . . . . . . . . 12 ⊢ (𝑛 = 𝑖 → (𝐸‘𝑛) = (𝐸‘𝑖))
45	44	eleq2d 2673	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑖 → (𝑥 ∈ (𝐸‘𝑛) ↔ 𝑥 ∈ (𝐸‘𝑖)))
46	43, 45	uzwo4 38246	. . . . . . . . . 10 ⊢ (((𝑁...𝑚) ⊆ (ℤ_≥‘𝑁) ∧ ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐸‘𝑛)) → ∃𝑛 ∈ (𝑁...𝑚)(𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))))
47	41, 42, 46	syl2anc 691	. . . . . . . . 9 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) → ∃𝑛 ∈ (𝑁...𝑚)(𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))))
48	47	adantl 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)) → ∃𝑛 ∈ (𝑁...𝑚)(𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))))
49		simprl 790	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ (𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))) → 𝑥 ∈ (𝐸‘𝑛))
50		nfv 1830	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑖(𝜑 ∧ 𝑛 ∈ (𝑁...𝑚))
51		nfra1 2925	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑖∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))
52	50, 51	nfan 1816	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑖((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))
53		elfzoelz 12339	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑖 ∈ (𝑁..^𝑛) → 𝑖 ∈ ℤ)
54	53	zred 11358	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑖 ∈ (𝑁..^𝑛) → 𝑖 ∈ ℝ)
55	54	adantl 481	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ∈ ℝ)
56		elfzelz 12213	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑛 ∈ ℤ)
57	56	zred 11358	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑛 ∈ ℝ)
58	57	adantr 480	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑛 ∈ ℝ)
59		1red 9934	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 1 ∈ ℝ)
60	58, 59	resubcld 10337	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝑛 − 1) ∈ ℝ)
61		elfzolem1 38478	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑖 ∈ (𝑁..^𝑛) → 𝑖 ≤ (𝑛 − 1))
62	61	adantl 481	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ≤ (𝑛 − 1))
63	58	ltm1d 10835	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝑛 − 1) < 𝑛)
64	55, 60, 58, 62, 63	lelttrd 10074	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 < 𝑛)
65	64	ad4ant24 1290	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 < 𝑛)
66		simplr 788	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝑛 ∈ (𝑁...𝑚) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) ∧ 𝑖 ∈ (𝑁..^𝑛)) → ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))
67		elfzel1 12212	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑁 ∈ ℤ)
68	67	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑁 ∈ ℤ)
69		elfzel2 12211	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑚 ∈ ℤ)
70	69	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑚 ∈ ℤ)
71	53	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ∈ ℤ)
72	68, 70, 71	3jca 1235	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝑁 ∈ ℤ ∧ 𝑚 ∈ ℤ ∧ 𝑖 ∈ ℤ))
73		elfzole1 12347	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑖 ∈ (𝑁..^𝑛) → 𝑁 ≤ 𝑖)
74	73	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑁 ≤ 𝑖)
75	70	zred 11358	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑚 ∈ ℝ)
76		1red 9934	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ (𝑛 ∈ (𝑁...𝑚) → 1 ∈ ℝ)
77	57, 76	resubcld 10337	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑛 ∈ (𝑁...𝑚) → (𝑛 − 1) ∈ ℝ)
78	69	zred 11358	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑚 ∈ ℝ)
79	57	ltm1d 10835	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑛 ∈ (𝑁...𝑚) → (𝑛 − 1) < 𝑛)
80		elfzle2 12216	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (𝑛 ∈ (𝑁...𝑚) → 𝑛 ≤ 𝑚)
81	77, 57, 78, 79, 80	ltletrd 10076	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑛 ∈ (𝑁...𝑚) → (𝑛 − 1) < 𝑚)
82	81	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝑛 − 1) < 𝑚)
83	55, 60, 75, 62, 82	lelttrd 10074	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 < 𝑚)
84	55, 75, 83	ltled 10064	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ≤ 𝑚)
85	72, 74, 84	jca32 556	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → ((𝑁 ∈ ℤ ∧ 𝑚 ∈ ℤ ∧ 𝑖 ∈ ℤ) ∧ (𝑁 ≤ 𝑖 ∧ 𝑖 ≤ 𝑚)))
86		elfz2 12204	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑖 ∈ (𝑁...𝑚) ↔ ((𝑁 ∈ ℤ ∧ 𝑚 ∈ ℤ ∧ 𝑖 ∈ ℤ) ∧ (𝑁 ≤ 𝑖 ∧ 𝑖 ≤ 𝑚)))
87	85, 86	sylibr 223	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑛 ∈ (𝑁...𝑚) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ∈ (𝑁...𝑚))
88	87	adantlr 747	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝑛 ∈ (𝑁...𝑚) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ∈ (𝑁...𝑚))
89		rspa 2914	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)) ∧ 𝑖 ∈ (𝑁...𝑚)) → (𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))
90	66, 88, 89	syl2anc 691	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((𝑛 ∈ (𝑁...𝑚) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))
91	90	adantlll 750	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))
92	65, 91	mpd 15	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) ∧ 𝑖 ∈ (𝑁..^𝑛)) → ¬ 𝑥 ∈ (𝐸‘𝑖))
93	92	ex 449	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → (𝑖 ∈ (𝑁..^𝑛) → ¬ 𝑥 ∈ (𝐸‘𝑖)))
94	52, 93	ralrimi 2940	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → ∀𝑖 ∈ (𝑁..^𝑛) ¬ 𝑥 ∈ (𝐸‘𝑖))
95		ralnex 2975	. . . . . . . . . . . . . . . . 17 ⊢ (∀𝑖 ∈ (𝑁..^𝑛) ¬ 𝑥 ∈ (𝐸‘𝑖) ↔ ¬ ∃𝑖 ∈ (𝑁..^𝑛)𝑥 ∈ (𝐸‘𝑖))
96	94, 95	sylib 207	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → ¬ ∃𝑖 ∈ (𝑁..^𝑛)𝑥 ∈ (𝐸‘𝑖))
97		eliun 4460	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 ∈ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖) ↔ ∃𝑖 ∈ (𝑁..^𝑛)𝑥 ∈ (𝐸‘𝑖))
98	96, 97	sylnibr 318	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → ¬ 𝑥 ∈ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))
99	98	adantrl 748	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ (𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))) → ¬ 𝑥 ∈ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))
100	49, 99	eldifd 3551	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ (𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))) → 𝑥 ∈ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))
101	14, 22	syldan 486	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) → (𝐹‘𝑛) = ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))
102	101	eqcomd 2616	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) = (𝐹‘𝑛))
103	102	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ (𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) = (𝐹‘𝑛))
104	100, 103	eleqtrd 2690	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) ∧ (𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖)))) → 𝑥 ∈ (𝐹‘𝑛))
105	104	ex 449	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑛 ∈ (𝑁...𝑚)) → ((𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → 𝑥 ∈ (𝐹‘𝑛)))
106	105	ex 449	. . . . . . . . . 10 ⊢ (𝜑 → (𝑛 ∈ (𝑁...𝑚) → ((𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → 𝑥 ∈ (𝐹‘𝑛))))
107	4, 106	reximdai 2995	. . . . . . . . 9 ⊢ (𝜑 → (∃𝑛 ∈ (𝑁...𝑚)(𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛)))
108	107	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)) → (∃𝑛 ∈ (𝑁...𝑚)(𝑥 ∈ (𝐸‘𝑛) ∧ ∀𝑖 ∈ (𝑁...𝑚)(𝑖 < 𝑛 → ¬ 𝑥 ∈ (𝐸‘𝑖))) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛)))
109	48, 108	mpd 15	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)) → ∃𝑛 ∈ (𝑁...𝑚)𝑥 ∈ (𝐹‘𝑛))
110	109, 1	sylibr 223	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)) → 𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛))
111	110	ralrimiva 2949	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛))
112		dfss3 3558	. . . . 5 ⊢ (∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) ⊆ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) ↔ ∀𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛)𝑥 ∈ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛))
113	111, 112	sylibr 223	. . . 4 ⊢ (𝜑 → ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) ⊆ ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛))
114	39, 113	eqssd 3585	. . 3 ⊢ (𝜑 → ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) = ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
115	114	ralrimivw 2950	. 2 ⊢ (𝜑 → ∀𝑚 ∈ 𝑍 ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) = ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛))
116	11	iuneqfzuz 38492	. . 3 ⊢ (∀𝑚 ∈ 𝑍 ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) = ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) → ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛))
117	115, 116	syl 17	. 2 ⊢ (𝜑 → ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛))
118		fveq2 6103	. . . . . . . . . . . . . 14 ⊢ (𝑛 = 𝑚 → (𝐸‘𝑛) = (𝐸‘𝑚))
119		oveq2 6557	. . . . . . . . . . . . . . 15 ⊢ (𝑛 = 𝑚 → (𝑁..^𝑛) = (𝑁..^𝑚))
120	119	iuneq1d 4481	. . . . . . . . . . . . . 14 ⊢ (𝑛 = 𝑚 → ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖) = ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖))
121	118, 120	difeq12d 3691	. . . . . . . . . . . . 13 ⊢ (𝑛 = 𝑚 → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) = ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖)))
122	121	cbvmptv 4678	. . . . . . . . . . . 12 ⊢ (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) = (𝑚 ∈ 𝑍 ↦ ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖)))
123	20, 122	eqtri 2632	. . . . . . . . . . 11 ⊢ 𝐹 = (𝑚 ∈ 𝑍 ↦ ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖)))
124		simpllr 795	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 < 𝑘) → 𝑛 ∈ 𝑍)
125		simplr 788	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 < 𝑘) → 𝑘 ∈ 𝑍)
126		simpr 476	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 < 𝑘) → 𝑛 < 𝑘)
127	11, 123, 124, 125, 126	iundjiunlem 39352	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 < 𝑘) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
128	127	adantlr 747	. . . . . . . . 9 ⊢ (((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 = 𝑘) ∧ 𝑛 < 𝑘) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
129		simpll 786	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 = 𝑘) ∧ ¬ 𝑛 < 𝑘) → ((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍))
130		neqne 2790	. . . . . . . . . . . 12 ⊢ (¬ 𝑛 = 𝑘 → 𝑛 ≠ 𝑘)
131		id 22	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ 𝑍)
132	131, 11	syl6eleq 2698	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ (ℤ_≥‘𝑁))
133		eluzelz 11573	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ (ℤ_≥‘𝑁) → 𝑘 ∈ ℤ)
134	132, 133	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℤ)
135	134	zred 11358	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℝ)
136	135	adantl 481	. . . . . . . . . . . . . 14 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ ℝ)
137	136	ad2antrr 758	. . . . . . . . . . . . 13 ⊢ ((((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 ≠ 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑘 ∈ ℝ)
138		id 22	. . . . . . . . . . . . . . . . 17 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ 𝑍)
139	138, 11	syl6eleq 2698	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ (ℤ_≥‘𝑁))
140		eluzelz 11573	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ (ℤ_≥‘𝑁) → 𝑛 ∈ ℤ)
141	139, 140	syl 17	. . . . . . . . . . . . . . 15 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ ℤ)
142	141	zred 11358	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ ℝ)
143	142	ad3antrrr 762	. . . . . . . . . . . . 13 ⊢ ((((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 ≠ 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑛 ∈ ℝ)
144		simpr 476	. . . . . . . . . . . . . . 15 ⊢ (((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 < 𝑘) → ¬ 𝑛 < 𝑘)
145	136	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ (((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 < 𝑘) → 𝑘 ∈ ℝ)
146	142	ad2antrr 758	. . . . . . . . . . . . . . . 16 ⊢ (((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 < 𝑘) → 𝑛 ∈ ℝ)
147	145, 146	lenltd 10062	. . . . . . . . . . . . . . 15 ⊢ (((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 < 𝑘) → (𝑘 ≤ 𝑛 ↔ ¬ 𝑛 < 𝑘))
148	144, 147	mpbird 246	. . . . . . . . . . . . . 14 ⊢ (((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 < 𝑘) → 𝑘 ≤ 𝑛)
149	148	adantlr 747	. . . . . . . . . . . . 13 ⊢ ((((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 ≠ 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑘 ≤ 𝑛)
150		simplr 788	. . . . . . . . . . . . 13 ⊢ ((((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 ≠ 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑛 ≠ 𝑘)
151	137, 143, 149, 150	leneltd 10070	. . . . . . . . . . . 12 ⊢ ((((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ 𝑛 ≠ 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑘 < 𝑛)
152	130, 151	sylanl2 681	. . . . . . . . . . 11 ⊢ ((((𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 = 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑘 < 𝑛)
153	152	ad5ant2345 1309	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 = 𝑘) ∧ ¬ 𝑛 < 𝑘) → 𝑘 < 𝑛)
154		anass 679	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ↔ (𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)))
155		incom 3767	. . . . . . . . . . . . 13 ⊢ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ((𝐹‘𝑘) ∩ (𝐹‘𝑛))
156	155	a1i 11	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)) ∧ 𝑘 < 𝑛) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ((𝐹‘𝑘) ∩ (𝐹‘𝑛)))
157		simplrr 797	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)) ∧ 𝑘 < 𝑛) → 𝑘 ∈ 𝑍)
158		simplrl 796	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)) ∧ 𝑘 < 𝑛) → 𝑛 ∈ 𝑍)
159		simpr 476	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)) ∧ 𝑘 < 𝑛) → 𝑘 < 𝑛)
160	11, 123, 157, 158, 159	iundjiunlem 39352	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)) ∧ 𝑘 < 𝑛) → ((𝐹‘𝑘) ∩ (𝐹‘𝑛)) = ∅)
161	156, 160	eqtrd 2644	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑘 ∈ 𝑍)) ∧ 𝑘 < 𝑛) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
162	154, 161	sylanb 488	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ 𝑘 < 𝑛) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
163	129, 153, 162	syl2anc 691	. . . . . . . . 9 ⊢ (((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 = 𝑘) ∧ ¬ 𝑛 < 𝑘) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
164	128, 163	pm2.61dan 828	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑛 = 𝑘) → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
165	164	ex 449	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (¬ 𝑛 = 𝑘 → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
166		df-or 384	. . . . . . 7 ⊢ ((𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅) ↔ (¬ 𝑛 = 𝑘 → ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
167	165, 166	sylibr 223	. . . . . 6 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
168	167	ralrimiva 2949	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
169	168	ex 449	. . . 4 ⊢ (𝜑 → (𝑛 ∈ 𝑍 → ∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)))
170	4, 169	ralrimi 2940	. . 3 ⊢ (𝜑 → ∀𝑛 ∈ 𝑍 ∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
171		nfcv 2751	. . . . 5 ⊢ Ⅎ𝑚(𝐹‘𝑛)
172		nfmpt1 4675	. . . . . . 7 ⊢ Ⅎ𝑛(𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)))
173	20, 172	nfcxfr 2749	. . . . . 6 ⊢ Ⅎ𝑛𝐹
174		nfcv 2751	. . . . . 6 ⊢ Ⅎ𝑛𝑚
175	173, 174	nffv 6110	. . . . 5 ⊢ Ⅎ𝑛(𝐹‘𝑚)
176		fveq2 6103	. . . . 5 ⊢ (𝑛 = 𝑚 → (𝐹‘𝑛) = (𝐹‘𝑚))
177	171, 175, 176	cbvdisj 4563	. . . 4 ⊢ (Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛) ↔ Disj 𝑚 ∈ 𝑍 (𝐹‘𝑚))
178		fveq2 6103	. . . . 5 ⊢ (𝑚 = 𝑘 → (𝐹‘𝑚) = (𝐹‘𝑘))
179	178	disjor 4567	. . . 4 ⊢ (Disj 𝑚 ∈ 𝑍 (𝐹‘𝑚) ↔ ∀𝑚 ∈ 𝑍 ∀𝑘 ∈ 𝑍 (𝑚 = 𝑘 ∨ ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅))
180		nfcv 2751	. . . . . 6 ⊢ Ⅎ𝑛𝑍
181		nfv 1830	. . . . . . 7 ⊢ Ⅎ𝑛 𝑚 = 𝑘
182		nfcv 2751	. . . . . . . . . 10 ⊢ Ⅎ𝑛𝑘
183	173, 182	nffv 6110	. . . . . . . . 9 ⊢ Ⅎ𝑛(𝐹‘𝑘)
184	175, 183	nfin 3782	. . . . . . . 8 ⊢ Ⅎ𝑛((𝐹‘𝑚) ∩ (𝐹‘𝑘))
185		nfcv 2751	. . . . . . . 8 ⊢ Ⅎ𝑛∅
186	184, 185	nfeq 2762	. . . . . . 7 ⊢ Ⅎ𝑛((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅
187	181, 186	nfor 1822	. . . . . 6 ⊢ Ⅎ𝑛(𝑚 = 𝑘 ∨ ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅)
188	180, 187	nfral 2929	. . . . 5 ⊢ Ⅎ𝑛∀𝑘 ∈ 𝑍 (𝑚 = 𝑘 ∨ ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅)
189		nfv 1830	. . . . 5 ⊢ Ⅎ𝑚∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)
190		equequ1 1939	. . . . . . 7 ⊢ (𝑚 = 𝑛 → (𝑚 = 𝑘 ↔ 𝑛 = 𝑘))
191		fveq2 6103	. . . . . . . . 9 ⊢ (𝑚 = 𝑛 → (𝐹‘𝑚) = (𝐹‘𝑛))
192	191	ineq1d 3775	. . . . . . . 8 ⊢ (𝑚 = 𝑛 → ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ((𝐹‘𝑛) ∩ (𝐹‘𝑘)))
193	192	eqeq1d 2612	. . . . . . 7 ⊢ (𝑚 = 𝑛 → (((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅ ↔ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
194	190, 193	orbi12d 742	. . . . . 6 ⊢ (𝑚 = 𝑛 → ((𝑚 = 𝑘 ∨ ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅) ↔ (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)))
195	194	ralbidv 2969	. . . . 5 ⊢ (𝑚 = 𝑛 → (∀𝑘 ∈ 𝑍 (𝑚 = 𝑘 ∨ ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅) ↔ ∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅)))
196	188, 189, 195	cbvral 3143	. . . 4 ⊢ (∀𝑚 ∈ 𝑍 ∀𝑘 ∈ 𝑍 (𝑚 = 𝑘 ∨ ((𝐹‘𝑚) ∩ (𝐹‘𝑘)) = ∅) ↔ ∀𝑛 ∈ 𝑍 ∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
197	177, 179, 196	3bitri 285	. . 3 ⊢ (Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛) ↔ ∀𝑛 ∈ 𝑍 ∀𝑘 ∈ 𝑍 (𝑛 = 𝑘 ∨ ((𝐹‘𝑛) ∩ (𝐹‘𝑘)) = ∅))
198	170, 197	sylibr 223	. 2 ⊢ (𝜑 → Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛))
199	115, 117, 198	jca31 555	1 ⊢ (𝜑 → ((∀𝑚 ∈ 𝑍 ∪ 𝑛 ∈ (𝑁...𝑚)(𝐹‘𝑛) = ∪ 𝑛 ∈ (𝑁...𝑚)(𝐸‘𝑛) ∧ ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) ∧ Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∨ wo 382 ∧ wa 383 ∧ w3a 1031 = wceq 1475 Ⅎwnf 1699 ∈ wcel 1977 ≠ wne 2780 ∀wral 2896 ∃wrex 2897 Vcvv 3173 ∖ cdif 3537 ∩ cin 3539 ⊆ wss 3540 ∅c0 3874 ∪ ciun 4455 Disj wdisj 4553 class class class wbr 4583 ↦ cmpt 4643 ⟶wf 5800 ‘cfv 5804 (class class class)co 6549 ℝcr 9814 1c1 9816 < clt 9953 ≤ cle 9954 − cmin 10145 ℤcz 11254 ℤ_≥cuz 11563 ...cfz 12197 ..^cfzo 12334

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892

This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-disj 4554 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-n0 11170 df-z 11255 df-uz 11564 df-fz 12198 df-fzo 12335

This theorem is referenced by: meaiunlelem 39361 meaiuninclem 39373 carageniuncllem2 39412

W3C validator