Theorem sigapildsys 30759

Description: Sigma-algebra are exactly classes which are both lambda and pi-systems. (Contributed by Thierry Arnoux, 13-Jun-2020.)

Hypotheses

Ref	Expression
dynkin.p	⊢ 𝑃 = {𝑠 ∈ 𝒫 𝒫 𝑂 ∣ (fi‘𝑠) ⊆ 𝑠}
dynkin.l	⊢ 𝐿 = {𝑠 ∈ 𝒫 𝒫 𝑂 ∣ (∅ ∈ 𝑠 ∧ ∀𝑥 ∈ 𝑠 (𝑂 ∖ 𝑥) ∈ 𝑠 ∧ ∀𝑥 ∈ 𝒫 𝑠((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑠))}

Assertion

Ref	Expression
sigapildsys	⊢ (sigAlgebra‘𝑂) = (𝑃 ∩ 𝐿)

Distinct variable groups:   𝑥,𝑠,𝑦   𝑥,𝐿,𝑦   𝑂,𝑠,𝑥   𝑥,𝑃,𝑦

Allowed substitution hints:   𝑃(𝑠)   𝐿(𝑠)   𝑂(𝑦)

Proof of Theorem sigapildsys

Dummy variables 𝑓 𝑖 𝑛 𝑡 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		dynkin.p	. . . 4 ⊢ 𝑃 = {𝑠 ∈ 𝒫 𝒫 𝑂 ∣ (fi‘𝑠) ⊆ 𝑠}
2	1	sigapisys 30752	. . 3 ⊢ (sigAlgebra‘𝑂) ⊆ 𝑃
3		dynkin.l	. . . 4 ⊢ 𝐿 = {𝑠 ∈ 𝒫 𝒫 𝑂 ∣ (∅ ∈ 𝑠 ∧ ∀𝑥 ∈ 𝑠 (𝑂 ∖ 𝑥) ∈ 𝑠 ∧ ∀𝑥 ∈ 𝒫 𝑠((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑠))}
4	3	sigaldsys 30756	. . 3 ⊢ (sigAlgebra‘𝑂) ⊆ 𝐿
5	2, 4	ssini 4060	. 2 ⊢ (sigAlgebra‘𝑂) ⊆ (𝑃 ∩ 𝐿)
6		id 22	. . . . . . . . 9 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑡 ∈ (𝑃 ∩ 𝐿))
7	6	elin1d 4029	. . . . . . . 8 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑡 ∈ 𝑃)
8	1	ispisys 30749	. . . . . . . 8 ⊢ (𝑡 ∈ 𝑃 ↔ (𝑡 ∈ 𝒫 𝒫 𝑂 ∧ (fi‘𝑡) ⊆ 𝑡))
9	7, 8	sylib 210	. . . . . . 7 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (𝑡 ∈ 𝒫 𝒫 𝑂 ∧ (fi‘𝑡) ⊆ 𝑡))
10	9	simpld 490	. . . . . 6 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑡 ∈ 𝒫 𝒫 𝑂)
11	10	elpwid 4390	. . . . 5 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑡 ⊆ 𝒫 𝑂)
12		dif0 4180	. . . . . . 7 ⊢ (𝑂 ∖ ∅) = 𝑂
13	6	elin2d 4030	. . . . . . . . . . 11 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑡 ∈ 𝐿)
14	3	isldsys 30753	. . . . . . . . . . 11 ⊢ (𝑡 ∈ 𝐿 ↔ (𝑡 ∈ 𝒫 𝒫 𝑂 ∧ (∅ ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡))))
15	13, 14	sylib 210	. . . . . . . . . 10 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (𝑡 ∈ 𝒫 𝒫 𝑂 ∧ (∅ ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡))))
16	15	simprd 491	. . . . . . . . 9 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (∅ ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡)))
17	16	simp2d 1177	. . . . . . . 8 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡)
18	16	simp1d 1176	. . . . . . . . 9 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → ∅ ∈ 𝑡)
19		difeq2 3949	. . . . . . . . . . 11 ⊢ (𝑥 = ∅ → (𝑂 ∖ 𝑥) = (𝑂 ∖ ∅))
20		eqidd 2826	. . . . . . . . . . 11 ⊢ (𝑥 = ∅ → 𝑡 = 𝑡)
21	19, 20	eleq12d 2900	. . . . . . . . . 10 ⊢ (𝑥 = ∅ → ((𝑂 ∖ 𝑥) ∈ 𝑡 ↔ (𝑂 ∖ ∅) ∈ 𝑡))
22	21	rspcv 3522	. . . . . . . . 9 ⊢ (∅ ∈ 𝑡 → (∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 → (𝑂 ∖ ∅) ∈ 𝑡))
23	18, 22	syl 17	. . . . . . . 8 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 → (𝑂 ∖ ∅) ∈ 𝑡))
24	17, 23	mpd 15	. . . . . . 7 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (𝑂 ∖ ∅) ∈ 𝑡)
25	12, 24	syl5eqelr 2911	. . . . . 6 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑂 ∈ 𝑡)
26		unieq 4666	. . . . . . . . . . . 12 ⊢ (𝑥 = ∅ → ∪ 𝑥 = ∪ ∅)
27		uni0 4687	. . . . . . . . . . . 12 ⊢ ∪ ∅ = ∅
28	26, 27	syl6eq 2877	. . . . . . . . . . 11 ⊢ (𝑥 = ∅ → ∪ 𝑥 = ∅)
29	28	adantl 475	. . . . . . . . . 10 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 = ∅) → ∪ 𝑥 = ∅)
30	18	ad3antrrr 721	. . . . . . . . . 10 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 = ∅) → ∅ ∈ 𝑡)
31	29, 30	eqeltrd 2906	. . . . . . . . 9 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 = ∅) → ∪ 𝑥 ∈ 𝑡)
32		vex 3417	. . . . . . . . . . . . . 14 ⊢ 𝑥 ∈ V
33	32	0sdom 8360	. . . . . . . . . . . . 13 ⊢ (∅ ≺ 𝑥 ↔ 𝑥 ≠ ∅)
34	33	biimpri 220	. . . . . . . . . . . 12 ⊢ (𝑥 ≠ ∅ → ∅ ≺ 𝑥)
35	34	adantl 475	. . . . . . . . . . 11 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) → ∅ ≺ 𝑥)
36		simplr 785	. . . . . . . . . . . 12 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) → 𝑥 ≼ ω)
37		nnenom 13074	. . . . . . . . . . . . 13 ⊢ ℕ ≈ ω
38	37	ensymi 8272	. . . . . . . . . . . 12 ⊢ ω ≈ ℕ
39		domentr 8281	. . . . . . . . . . . 12 ⊢ ((𝑥 ≼ ω ∧ ω ≈ ℕ) → 𝑥 ≼ ℕ)
40	36, 38, 39	sylancl 580	. . . . . . . . . . 11 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) → 𝑥 ≼ ℕ)
41		fodomr 8380	. . . . . . . . . . 11 ⊢ ((∅ ≺ 𝑥 ∧ 𝑥 ≼ ℕ) → ∃𝑓 𝑓:ℕ–onto→𝑥)
42	35, 40, 41	syl2anc 579	. . . . . . . . . 10 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) → ∃𝑓 𝑓:ℕ–onto→𝑥)
43		fveq2 6433	. . . . . . . . . . . . . 14 ⊢ (𝑛 = 𝑖 → (𝑓‘𝑛) = (𝑓‘𝑖))
44	43	iundisj 23714	. . . . . . . . . . . . 13 ⊢ ∪ 𝑛 ∈ ℕ (𝑓‘𝑛) = ∪ 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))
45		fofn 6355	. . . . . . . . . . . . . . 15 ⊢ (𝑓:ℕ–onto→𝑥 → 𝑓 Fn ℕ)
46		fniunfv 6760	. . . . . . . . . . . . . . 15 ⊢ (𝑓 Fn ℕ → ∪ 𝑛 ∈ ℕ (𝑓‘𝑛) = ∪ ran 𝑓)
47	45, 46	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝑓:ℕ–onto→𝑥 → ∪ 𝑛 ∈ ℕ (𝑓‘𝑛) = ∪ ran 𝑓)
48		forn 6356	. . . . . . . . . . . . . . 15 ⊢ (𝑓:ℕ–onto→𝑥 → ran 𝑓 = 𝑥)
49	48	unieqd 4668	. . . . . . . . . . . . . 14 ⊢ (𝑓:ℕ–onto→𝑥 → ∪ ran 𝑓 = ∪ 𝑥)
50	47, 49	eqtrd 2861	. . . . . . . . . . . . 13 ⊢ (𝑓:ℕ–onto→𝑥 → ∪ 𝑛 ∈ ℕ (𝑓‘𝑛) = ∪ 𝑥)
51	44, 50	syl5eqr 2875	. . . . . . . . . . . 12 ⊢ (𝑓:ℕ–onto→𝑥 → ∪ 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) = ∪ 𝑥)
52	51	adantl 475	. . . . . . . . . . 11 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ∪ 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) = ∪ 𝑥)
53		fvex 6446	. . . . . . . . . . . . . 14 ⊢ (𝑓‘𝑛) ∈ V
54		difexg 5033	. . . . . . . . . . . . . 14 ⊢ ((𝑓‘𝑛) ∈ V → ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) ∈ V)
55	53, 54	ax-mp 5	. . . . . . . . . . . . 13 ⊢ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) ∈ V
56	55	dfiun3 5613	. . . . . . . . . . . 12 ⊢ ∪ 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) = ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
57		nfv 2013	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑛((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥)
58		nfcv 2969	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑛𝑦
59		nfmpt1 4970	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑛(𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
60	59	nfrn 5601	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑛ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
61	58, 60	nfel 2982	. . . . . . . . . . . . . . . . . 18 ⊢ Ⅎ𝑛 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
62	57, 61	nfan 2002	. . . . . . . . . . . . . . . . 17 ⊢ Ⅎ𝑛(((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))))
63		simpr 479	. . . . . . . . . . . . . . . . . 18 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
64		nfv 2013	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ Ⅎ𝑖((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥)
65		nfcv 2969	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ Ⅎ𝑖𝑦
66		nfcv 2969	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ Ⅎ𝑖ℕ
67		nfcv 2969	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ Ⅎ𝑖(𝑓‘𝑛)
68		nfiu1 4770	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ Ⅎ𝑖∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)
69	67, 68	nfdif 3958	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ Ⅎ𝑖((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))
70	66, 69	nfmpt 4969	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ Ⅎ𝑖(𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
71	70	nfrn 5601	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ Ⅎ𝑖ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
72	65, 71	nfel 2982	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ Ⅎ𝑖 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
73	64, 72	nfan 2002	. . . . . . . . . . . . . . . . . . . . 21 ⊢ Ⅎ𝑖(((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))))
74		nfv 2013	. . . . . . . . . . . . . . . . . . . . 21 ⊢ Ⅎ𝑖 𝑛 ∈ ℕ
75	73, 74	nfan 2002	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑖((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ)
76	65, 69	nfeq 2981	. . . . . . . . . . . . . . . . . . . 20 ⊢ Ⅎ𝑖 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))
77	75, 76	nfan 2002	. . . . . . . . . . . . . . . . . . 19 ⊢ Ⅎ𝑖(((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
78	6	ad7antr 736	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑡 ∈ (𝑃 ∩ 𝐿))
79		simp-4r 803	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → 𝑥 ∈ 𝒫 𝑡)
80	79	ad3antrrr 721	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑥 ∈ 𝒫 𝑡)
81	80	elpwid 4390	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑥 ⊆ 𝑡)
82		fof 6353	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓:ℕ–onto→𝑥 → 𝑓:ℕ⟶𝑥)
83	82	ad4antlr 726	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑓:ℕ⟶𝑥)
84		simplr 785	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑛 ∈ ℕ)
85	83, 84	ffvelrnd 6609	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (𝑓‘𝑛) ∈ 𝑥)
86	81, 85	sseldd 3828	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (𝑓‘𝑛) ∈ 𝑡)
87		fzofi 13068	. . . . . . . . . . . . . . . . . . . 20 ⊢ (1..^𝑛) ∈ Fin
88	87	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (1..^𝑛) ∈ Fin)
89	81	adantr 474	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∧ 𝑖 ∈ (1..^𝑛)) → 𝑥 ⊆ 𝑡)
90	83	adantr 474	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∧ 𝑖 ∈ (1..^𝑛)) → 𝑓:ℕ⟶𝑥)
91		fzossnn 12812	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (1..^𝑛) ⊆ ℕ
92	91	a1i 11	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (1..^𝑛) ⊆ ℕ)
93	92	sselda 3827	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∧ 𝑖 ∈ (1..^𝑛)) → 𝑖 ∈ ℕ)
94	90, 93	ffvelrnd 6609	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∧ 𝑖 ∈ (1..^𝑛)) → (𝑓‘𝑖) ∈ 𝑥)
95	89, 94	sseldd 3828	. . . . . . . . . . . . . . . . . . 19 ⊢ (((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∧ 𝑖 ∈ (1..^𝑛)) → (𝑓‘𝑖) ∈ 𝑡)
96	1, 3, 77, 78, 86, 88, 95	sigapildsyslem 30758	. . . . . . . . . . . . . . . . . 18 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) ∈ 𝑡)
97	63, 96	eqeltrd 2906	. . . . . . . . . . . . . . . . 17 ⊢ ((((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) ∧ 𝑛 ∈ ℕ) ∧ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑦 ∈ 𝑡)
98		simpr 479	. . . . . . . . . . . . . . . . . 18 ⊢ ((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) → 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))))
99		eqid 2825	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) = (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
100	99, 55	elrnmpti 5609	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ↔ ∃𝑛 ∈ ℕ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
101	98, 100	sylib 210	. . . . . . . . . . . . . . . . 17 ⊢ ((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) → ∃𝑛 ∈ ℕ 𝑦 = ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))
102	62, 97, 101	r19.29af 3286	. . . . . . . . . . . . . . . 16 ⊢ ((((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))) → 𝑦 ∈ 𝑡)
103	102	ex 403	. . . . . . . . . . . . . . 15 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → (𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → 𝑦 ∈ 𝑡))
104	103	ssrdv 3833	. . . . . . . . . . . . . 14 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ⊆ 𝑡)
105		nnex 11357	. . . . . . . . . . . . . . . . 17 ⊢ ℕ ∈ V
106	105	mptex 6742	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ V
107	106	rnex 7362	. . . . . . . . . . . . . . 15 ⊢ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ V
108		elpwg 4386	. . . . . . . . . . . . . . 15 ⊢ (ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ V → (ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝒫 𝑡 ↔ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ⊆ 𝑡))
109	107, 108	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ (ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝒫 𝑡 ↔ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ⊆ 𝑡)
110	104, 109	sylibr 226	. . . . . . . . . . . . 13 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝒫 𝑡)
111	16	simp3d 1178	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡))
112	111	ad4antr 724	. . . . . . . . . . . . 13 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡))
113		nnct 13075	. . . . . . . . . . . . . . 15 ⊢ ℕ ≼ ω
114		mptct 9675	. . . . . . . . . . . . . . 15 ⊢ (ℕ ≼ ω → (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω)
115	113, 114	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω
116		rnct 9662	. . . . . . . . . . . . . 14 ⊢ ((𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω → ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω)
117	115, 116	mp1i 13	. . . . . . . . . . . . 13 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω)
118	43	iundisj2 23715	. . . . . . . . . . . . . 14 ⊢ Disj 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))
119		disjrnmpt 29934	. . . . . . . . . . . . . 14 ⊢ (Disj 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) → Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦)
120	118, 119	mp1i 13	. . . . . . . . . . . . 13 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦)
121		breq1 4876	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (𝑥 ≼ ω ↔ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω))
122		disjeq1 4848	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (Disj 𝑦 ∈ 𝑥 𝑦 ↔ Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦))
123	121, 122	anbi12d 624	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → ((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) ↔ (ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω ∧ Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦)))
124		unieq 4666	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → ∪ 𝑥 = ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))))
125	124	eleq1d 2891	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (∪ 𝑥 ∈ 𝑡 ↔ ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝑡))
126	123, 125	imbi12d 336	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) → (((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡) ↔ ((ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω ∧ Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦) → ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝑡)))
127	126	rspcv 3522	. . . . . . . . . . . . . . 15 ⊢ (ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝒫 𝑡 → (∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡) → ((ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω ∧ Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦) → ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝑡)))
128	127	imp 397	. . . . . . . . . . . . . 14 ⊢ ((ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝒫 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡)) → ((ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω ∧ Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦) → ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝑡))
129	128	imp 397	. . . . . . . . . . . . 13 ⊢ (((ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝒫 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡((𝑥 ≼ ω ∧ Disj 𝑦 ∈ 𝑥 𝑦) → ∪ 𝑥 ∈ 𝑡)) ∧ (ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ≼ ω ∧ Disj 𝑦 ∈ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)))𝑦)) → ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝑡)
130	110, 112, 117, 120, 129	syl22anc 872	. . . . . . . . . . . 12 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ∪ ran (𝑛 ∈ ℕ ↦ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖))) ∈ 𝑡)
131	56, 130	syl5eqel 2910	. . . . . . . . . . 11 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ∪ 𝑛 ∈ ℕ ((𝑓‘𝑛) ∖ ∪ 𝑖 ∈ (1..^𝑛)(𝑓‘𝑖)) ∈ 𝑡)
132	52, 131	eqeltrrd 2907	. . . . . . . . . 10 ⊢ (((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) ∧ 𝑓:ℕ–onto→𝑥) → ∪ 𝑥 ∈ 𝑡)
133	42, 132	exlimddv 2034	. . . . . . . . 9 ⊢ ((((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) ∧ 𝑥 ≠ ∅) → ∪ 𝑥 ∈ 𝑡)
134	31, 133	pm2.61dane 3086	. . . . . . . 8 ⊢ (((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) ∧ 𝑥 ≼ ω) → ∪ 𝑥 ∈ 𝑡)
135	134	ex 403	. . . . . . 7 ⊢ ((𝑡 ∈ (𝑃 ∩ 𝐿) ∧ 𝑥 ∈ 𝒫 𝑡) → (𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑡))
136	135	ralrimiva 3175	. . . . . 6 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → ∀𝑥 ∈ 𝒫 𝑡(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑡))
137	25, 17, 136	3jca 1162	. . . . 5 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (𝑂 ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑡)))
138	11, 137	jca 507	. . . 4 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → (𝑡 ⊆ 𝒫 𝑂 ∧ (𝑂 ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑡))))
139		vex 3417	. . . . 5 ⊢ 𝑡 ∈ V
140		issiga 30708	. . . . 5 ⊢ (𝑡 ∈ V → (𝑡 ∈ (sigAlgebra‘𝑂) ↔ (𝑡 ⊆ 𝒫 𝑂 ∧ (𝑂 ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑡)))))
141	139, 140	ax-mp 5	. . . 4 ⊢ (𝑡 ∈ (sigAlgebra‘𝑂) ↔ (𝑡 ⊆ 𝒫 𝑂 ∧ (𝑂 ∈ 𝑡 ∧ ∀𝑥 ∈ 𝑡 (𝑂 ∖ 𝑥) ∈ 𝑡 ∧ ∀𝑥 ∈ 𝒫 𝑡(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑡))))
142	138, 141	sylibr 226	. . 3 ⊢ (𝑡 ∈ (𝑃 ∩ 𝐿) → 𝑡 ∈ (sigAlgebra‘𝑂))
143	142	ssriv 3831	. 2 ⊢ (𝑃 ∩ 𝐿) ⊆ (sigAlgebra‘𝑂)
144	5, 143	eqssi 3843	1 ⊢ (sigAlgebra‘𝑂) = (𝑃 ∩ 𝐿)

Syntax hints:   → wi 4   ↔ wb 198   ∧ wa 386   ∧ w3a 1111   = wceq 1656  ∃wex 1878   ∈ wcel 2164   ≠ wne 2999  ∀wral 3117  ∃wrex 3118  {crab 3121  Vcvv 3414   ∖ cdif 3795   ∩ cin 3797   ⊆ wss 3798  ∅c0 4144  𝒫 cpw 4378  ∪ cuni 4658  ∪ ciun 4740  Disj wdisj 4841   class class class wbr 4873   ↦ cmpt 4952  ran crn 5343   Fn wfn 6118  ⟶wf 6119  –onto→wfo 6121  ‘cfv 6123  (class class class)co 6905  ωcom 7326   ≈ cen 8219   ≼ cdom 8220   ≺ csdm 8221  Fincfn 8222  ficfi 8585  1c1 10253  ℕcn 11350  ..^cfzo 12760  sigAlgebracsiga 30704

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-rep 4994  ax-sep 5005  ax-nul 5013  ax-pow 5065  ax-pr 5127  ax-un 7209  ax-inf2 8815  ax-ac2 9600  ax-cnex 10308  ax-resscn 10309  ax-1cn 10310  ax-icn 10311  ax-addcl 10312  ax-addrcl 10313  ax-mulcl 10314  ax-mulrcl 10315  ax-mulcom 10316  ax-addass 10317  ax-mulass 10318  ax-distr 10319  ax-i2m1 10320  ax-1ne0 10321  ax-1rid 10322  ax-rnegex 10323  ax-rrecex 10324  ax-cnre 10325  ax-pre-lttri 10326  ax-pre-lttrn 10327  ax-pre-ltadd 10328  ax-pre-mulgt0 10329

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-3or 1112  df-3an 1113  df-tru 1660  df-fal 1670  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-nel 3103  df-ral 3122  df-rex 3123  df-reu 3124  df-rmo 3125  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-pss 3814  df-nul 4145  df-if 4307  df-pw 4380  df-sn 4398  df-pr 4400  df-tp 4402  df-op 4404  df-uni 4659  df-int 4698  df-iun 4742  df-iin 4743  df-disj 4842  df-br 4874  df-opab 4936  df-mpt 4953  df-tr 4976  df-id 5250  df-eprel 5255  df-po 5263  df-so 5264  df-fr 5301  df-se 5302  df-we 5303  df-xp 5348  df-rel 5349  df-cnv 5350  df-co 5351  df-dm 5352  df-rn 5353  df-res 5354  df-ima 5355  df-pred 5920  df-ord 5966  df-on 5967  df-lim 5968  df-suc 5969  df-iota 6086  df-fun 6125  df-fn 6126  df-f 6127  df-f1 6128  df-fo 6129  df-f1o 6130  df-fv 6131  df-isom 6132  df-riota 6866  df-ov 6908  df-oprab 6909  df-mpt2 6910  df-om 7327  df-1st 7428  df-2nd 7429  df-wrecs 7672  df-recs 7734  df-rdg 7772  df-1o 7826  df-2o 7827  df-oadd 7830  df-er 8009  df-map 8124  df-en 8223  df-dom 8224  df-sdom 8225  df-fin 8226  df-fi 8586  df-sup 8617  df-inf 8618  df-oi 8684  df-card 9078  df-acn 9081  df-ac 9252  df-cda 9305  df-pnf 10393  df-mnf 10394  df-xr 10395  df-ltxr 10396  df-le 10397  df-sub 10587  df-neg 10588  df-nn 11351  df-n0 11619  df-z 11705  df-uz 11969  df-fz 12620  df-fzo 12761  df-siga 30705

This theorem is referenced by:  dynkin  30764