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Theorem cfsmolem 9957

Description: Lemma for cfsmo 9958. (Contributed by Mario Carneiro, 28-Feb-2013.)

**Hypotheses**
Ref	Expression
cfsmolem.2	⊢ 𝐹 = (𝑧 ∈ V ↦ ((𝑔‘dom 𝑧) ∪ ∪ 𝑡 ∈ dom 𝑧 suc (𝑧‘𝑡)))
cfsmolem.3	⊢ 𝐺 = (recs(𝐹) ↾ (cf‘𝐴))

**Assertion**
Ref	Expression
cfsmolem	⊢ (𝐴 ∈ On → ∃𝑓(𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤)))

Distinct variable groups: 𝑓,𝑔,𝑡,𝑤,𝑧,𝐴 𝑓,𝐹,𝑡,𝑧 𝑓,𝐺,𝑤,𝑧 Allowed substitution hints: 𝐹(𝑤,𝑔) 𝐺(𝑡,𝑔)

Proof of Theorem cfsmolem Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cff1 9945	. 2 ⊢ (𝐴 ∈ On → ∃𝑔(𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)))
2		cfon 9942	. . . . . . . . . . . 12 ⊢ (cf‘𝐴) ∈ On
3	2	oneli 6359	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (cf‘𝐴) → 𝑥 ∈ On)
4	3	3ad2ant3 1133	. . . . . . . . . 10 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → 𝑥 ∈ On)
5		eleq1w 2821	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → (𝑥 ∈ (cf‘𝐴) ↔ 𝑦 ∈ (cf‘𝐴)))
6	5	3anbi3d 1440	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ↔ (𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴))))
7		fveq2 6756	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑦 → (𝐺‘𝑥) = (𝐺‘𝑦))
8	7	eleq1d 2823	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑦 → ((𝐺‘𝑥) ∈ 𝐴 ↔ (𝐺‘𝑦) ∈ 𝐴))
9	6, 8	imbi12d 344	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑦 → (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑥) ∈ 𝐴) ↔ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ 𝐴)))
10		simpl1 1189	. . . . . . . . . . . . . . 15 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → 𝑔:(cf‘𝐴)–1-1→𝐴)
11		simpl2 1190	. . . . . . . . . . . . . . 15 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → 𝐴 ∈ On)
12		ontr1 6297	. . . . . . . . . . . . . . . . . 18 ⊢ ((cf‘𝐴) ∈ On → ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → 𝑦 ∈ (cf‘𝐴)))
13	2, 12	ax-mp 5	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → 𝑦 ∈ (cf‘𝐴))
14	13	ancoms 458	. . . . . . . . . . . . . . . 16 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ 𝑦 ∈ 𝑥) → 𝑦 ∈ (cf‘𝐴))
15	14	3ad2antl3 1185	. . . . . . . . . . . . . . 15 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → 𝑦 ∈ (cf‘𝐴))
16		pm2.27 42	. . . . . . . . . . . . . . 15 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ 𝐴) → (𝐺‘𝑦) ∈ 𝐴))
17	10, 11, 15, 16	syl3anc 1369	. . . . . . . . . . . . . 14 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ 𝐴) → (𝐺‘𝑦) ∈ 𝐴))
18	17	ralimdva 3102	. . . . . . . . . . . . 13 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (∀𝑦 ∈ 𝑥 ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ 𝐴) → ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴))
19		cfsmolem.3	. . . . . . . . . . . . . . . . . . . 20 ⊢ 𝐺 = (recs(𝐹) ↾ (cf‘𝐴))
20	19	fveq1i 6757	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐺‘𝑥) = ((recs(𝐹) ↾ (cf‘𝐴))‘𝑥)
21		fvres 6775	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 ∈ (cf‘𝐴) → ((recs(𝐹) ↾ (cf‘𝐴))‘𝑥) = (recs(𝐹)‘𝑥))
22	20, 21	eqtrid 2790	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ (cf‘𝐴) → (𝐺‘𝑥) = (recs(𝐹)‘𝑥))
23		recsval 8206	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑥 ∈ On → (recs(𝐹)‘𝑥) = (𝐹‘(recs(𝐹) ↾ 𝑥)))
24		recsfnon 8205	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ recs(𝐹) Fn On
25		fnfun 6517	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (recs(𝐹) Fn On → Fun recs(𝐹))
26	24, 25	ax-mp 5	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ Fun recs(𝐹)
27		vex 3426	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ 𝑥 ∈ V
28		resfunexg 7073	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((Fun recs(𝐹) ∧ 𝑥 ∈ V) → (recs(𝐹) ↾ 𝑥) ∈ V)
29	26, 27, 28	mp2an 688	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (recs(𝐹) ↾ 𝑥) ∈ V
30		dmeq 5801	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑧 = (recs(𝐹) ↾ 𝑥) → dom 𝑧 = dom (recs(𝐹) ↾ 𝑥))
31	30	fveq2d 6760	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑧 = (recs(𝐹) ↾ 𝑥) → (𝑔‘dom 𝑧) = (𝑔‘dom (recs(𝐹) ↾ 𝑥)))
32		fveq1 6755	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑧 = (recs(𝐹) ↾ 𝑥) → (𝑧‘𝑡) = ((recs(𝐹) ↾ 𝑥)‘𝑡))
33		suceq 6316	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑧‘𝑡) = ((recs(𝐹) ↾ 𝑥)‘𝑡) → suc (𝑧‘𝑡) = suc ((recs(𝐹) ↾ 𝑥)‘𝑡))
34	32, 33	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑧 = (recs(𝐹) ↾ 𝑥) → suc (𝑧‘𝑡) = suc ((recs(𝐹) ↾ 𝑥)‘𝑡))
35	30, 34	iuneq12d 4949	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑧 = (recs(𝐹) ↾ 𝑥) → ∪ 𝑡 ∈ dom 𝑧 suc (𝑧‘𝑡) = ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡))
36	31, 35	uneq12d 4094	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑧 = (recs(𝐹) ↾ 𝑥) → ((𝑔‘dom 𝑧) ∪ ∪ 𝑡 ∈ dom 𝑧 suc (𝑧‘𝑡)) = ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡)))
37		cfsmolem.2	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ 𝐹 = (𝑧 ∈ V ↦ ((𝑔‘dom 𝑧) ∪ ∪ 𝑡 ∈ dom 𝑧 suc (𝑧‘𝑡)))
38		fvex 6769	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∈ V
39	29	dmex 7732	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ dom (recs(𝐹) ↾ 𝑥) ∈ V
40		fvex 6769	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((recs(𝐹) ↾ 𝑥)‘𝑡) ∈ V
41	40	sucex 7633	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ suc ((recs(𝐹) ↾ 𝑥)‘𝑡) ∈ V
42	39, 41	iunex 7784	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡) ∈ V
43	38, 42	unex 7574	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡)) ∈ V
44	36, 37, 43	fvmpt 6857	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((recs(𝐹) ↾ 𝑥) ∈ V → (𝐹‘(recs(𝐹) ↾ 𝑥)) = ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡)))
45	29, 44	ax-mp 5	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝐹‘(recs(𝐹) ↾ 𝑥)) = ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡))
46	23, 45	eqtrdi 2795	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 ∈ On → (recs(𝐹)‘𝑥) = ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡)))
47		onss 7611	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑥 ∈ On → 𝑥 ⊆ On)
48		fnssres 6539	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((recs(𝐹) Fn On ∧ 𝑥 ⊆ On) → (recs(𝐹) ↾ 𝑥) Fn 𝑥)
49	24, 47, 48	sylancr 586	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑥 ∈ On → (recs(𝐹) ↾ 𝑥) Fn 𝑥)
50		fndm 6520	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((recs(𝐹) ↾ 𝑥) Fn 𝑥 → dom (recs(𝐹) ↾ 𝑥) = 𝑥)
51		fveq2 6756	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (dom (recs(𝐹) ↾ 𝑥) = 𝑥 → (𝑔‘dom (recs(𝐹) ↾ 𝑥)) = (𝑔‘𝑥))
52		iuneq1 4937	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (dom (recs(𝐹) ↾ 𝑥) = 𝑥 → ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡) = ∪ 𝑡 ∈ 𝑥 suc ((recs(𝐹) ↾ 𝑥)‘𝑡))
53		fvres 6775	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑡 ∈ 𝑥 → ((recs(𝐹) ↾ 𝑥)‘𝑡) = (recs(𝐹)‘𝑡))
54		suceq 6316	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((recs(𝐹) ↾ 𝑥)‘𝑡) = (recs(𝐹)‘𝑡) → suc ((recs(𝐹) ↾ 𝑥)‘𝑡) = suc (recs(𝐹)‘𝑡))
55	53, 54	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑡 ∈ 𝑥 → suc ((recs(𝐹) ↾ 𝑥)‘𝑡) = suc (recs(𝐹)‘𝑡))
56	55	iuneq2i 4942	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ∪ 𝑡 ∈ 𝑥 suc ((recs(𝐹) ↾ 𝑥)‘𝑡) = ∪ 𝑡 ∈ 𝑥 suc (recs(𝐹)‘𝑡)
57		fveq2 6756	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑦 = 𝑡 → (recs(𝐹)‘𝑦) = (recs(𝐹)‘𝑡))
58		suceq 6316	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((recs(𝐹)‘𝑦) = (recs(𝐹)‘𝑡) → suc (recs(𝐹)‘𝑦) = suc (recs(𝐹)‘𝑡))
59	57, 58	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑦 = 𝑡 → suc (recs(𝐹)‘𝑦) = suc (recs(𝐹)‘𝑡))
60	59	cbviunv 4966	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = ∪ 𝑡 ∈ 𝑥 suc (recs(𝐹)‘𝑡)
61	56, 60	eqtr4i 2769	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ∪ 𝑡 ∈ 𝑥 suc ((recs(𝐹) ↾ 𝑥)‘𝑡) = ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)
62	52, 61	eqtrdi 2795	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (dom (recs(𝐹) ↾ 𝑥) = 𝑥 → ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡) = ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
63	51, 62	uneq12d 4094	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (dom (recs(𝐹) ↾ 𝑥) = 𝑥 → ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡)) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
64	49, 50, 63	3syl 18	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 ∈ On → ((𝑔‘dom (recs(𝐹) ↾ 𝑥)) ∪ ∪ 𝑡 ∈ dom (recs(𝐹) ↾ 𝑥)suc ((recs(𝐹) ↾ 𝑥)‘𝑡)) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
65	46, 64	eqtrd 2778	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 ∈ On → (recs(𝐹)‘𝑥) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
66	3, 65	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ (cf‘𝐴) → (recs(𝐹)‘𝑥) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
67	22, 66	eqtrd 2778	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 ∈ (cf‘𝐴) → (𝐺‘𝑥) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
68	67	3ad2ant2 1132	. . . . . . . . . . . . . . . 16 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (𝐺‘𝑥) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
69		eloni 6261	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐴 ∈ On → Ord 𝐴)
70	69	adantl 481	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) → Ord 𝐴)
71	70	3ad2ant1 1131	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → Ord 𝐴)
72		f1f 6654	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑔:(cf‘𝐴)–1-1→𝐴 → 𝑔:(cf‘𝐴)⟶𝐴)
73	72	ffvelrnda 6943	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝑥 ∈ (cf‘𝐴)) → (𝑔‘𝑥) ∈ 𝐴)
74	73	adantlr 711	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴)) → (𝑔‘𝑥) ∈ 𝐴)
75	74	3adant3 1130	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (𝑔‘𝑥) ∈ 𝐴)
76	19	fveq1i 6757	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝐺‘𝑦) = ((recs(𝐹) ↾ (cf‘𝐴))‘𝑦)
77	13	fvresd 6776	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → ((recs(𝐹) ↾ (cf‘𝐴))‘𝑦) = (recs(𝐹)‘𝑦))
78	76, 77	eqtrid 2790	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑦) = (recs(𝐹)‘𝑦))
79	78	adantrl 712	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑦 ∈ 𝑥 ∧ (𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴))) → (𝐺‘𝑦) = (recs(𝐹)‘𝑦))
80	79	ancoms 458	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → (𝐺‘𝑦) = (recs(𝐹)‘𝑦))
81	80	eleq1d 2823	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → ((𝐺‘𝑦) ∈ 𝐴 ↔ (recs(𝐹)‘𝑦) ∈ 𝐴))
82		ordsucss 7640	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (Ord 𝐴 → ((recs(𝐹)‘𝑦) ∈ 𝐴 → suc (recs(𝐹)‘𝑦) ⊆ 𝐴))
83	69, 82	syl 17	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝐴 ∈ On → ((recs(𝐹)‘𝑦) ∈ 𝐴 → suc (recs(𝐹)‘𝑦) ⊆ 𝐴))
84	83	ad2antrr 722	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → ((recs(𝐹)‘𝑦) ∈ 𝐴 → suc (recs(𝐹)‘𝑦) ⊆ 𝐴))
85	81, 84	sylbid 239	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → ((𝐺‘𝑦) ∈ 𝐴 → suc (recs(𝐹)‘𝑦) ⊆ 𝐴))
86	85	ralimdva 3102	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴 → ∀𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴))
87		iunss 4971	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴 ↔ ∀𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴)
88	86, 87	syl6ibr 251	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴 → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴))
89	88	3impia 1115	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴)
90		onelon 6276	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝐴 ∈ On ∧ (recs(𝐹)‘𝑦) ∈ 𝐴) → (recs(𝐹)‘𝑦) ∈ On)
91	90	ex 412	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝐴 ∈ On → ((recs(𝐹)‘𝑦) ∈ 𝐴 → (recs(𝐹)‘𝑦) ∈ On))
92	91	ad2antrr 722	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → ((recs(𝐹)‘𝑦) ∈ 𝐴 → (recs(𝐹)‘𝑦) ∈ On))
93	81, 92	sylbid 239	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → ((𝐺‘𝑦) ∈ 𝐴 → (recs(𝐹)‘𝑦) ∈ On))
94		suceloni 7635	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((recs(𝐹)‘𝑦) ∈ On → suc (recs(𝐹)‘𝑦) ∈ On)
95	93, 94	syl6 35	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) ∧ 𝑦 ∈ 𝑥) → ((𝐺‘𝑦) ∈ 𝐴 → suc (recs(𝐹)‘𝑦) ∈ On))
96	95	ralimdva 3102	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴 → ∀𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ On))
97	96	3impia 1115	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ∀𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ On)
98		iunon 8141	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑥 ∈ V ∧ ∀𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ On) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ On)
99	27, 97, 98	sylancr 586	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ On)
100		simp1 1134	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → 𝐴 ∈ On)
101		onsseleq 6292	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ On ∧ 𝐴 ∈ On) → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴 ↔ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴 ∨ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴)))
102	99, 100, 101	syl2anc 583	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴 ↔ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴 ∨ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴)))
103		idd 24	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴 → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴))
104		simpll 763	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → 𝑥 ∈ (cf‘𝐴))
105		simprr 769	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → 𝐴 ∈ On)
106	3	ad2antrr 722	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → 𝑥 ∈ On)
107	3, 49	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑥 ∈ (cf‘𝐴) → (recs(𝐹) ↾ 𝑥) Fn 𝑥)
108	107	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (recs(𝐹) ↾ 𝑥) Fn 𝑥)
109	78	ancoms 458	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ 𝑦 ∈ 𝑥) → (𝐺‘𝑦) = (recs(𝐹)‘𝑦))
110		fvres 6775	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑦 ∈ 𝑥 → ((recs(𝐹) ↾ 𝑥)‘𝑦) = (recs(𝐹)‘𝑦))
111	110	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ 𝑦 ∈ 𝑥) → ((recs(𝐹) ↾ 𝑥)‘𝑦) = (recs(𝐹)‘𝑦))
112	109, 111	eqtr4d 2781	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ 𝑦 ∈ 𝑥) → (𝐺‘𝑦) = ((recs(𝐹) ↾ 𝑥)‘𝑦))
113	112	eleq1d 2823	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ 𝑦 ∈ 𝑥) → ((𝐺‘𝑦) ∈ 𝐴 ↔ ((recs(𝐹) ↾ 𝑥)‘𝑦) ∈ 𝐴))
114	113	ralbidva 3119	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑥 ∈ (cf‘𝐴) → (∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴 ↔ ∀𝑦 ∈ 𝑥 ((recs(𝐹) ↾ 𝑥)‘𝑦) ∈ 𝐴))
115	114	biimpa 476	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ∀𝑦 ∈ 𝑥 ((recs(𝐹) ↾ 𝑥)‘𝑦) ∈ 𝐴)
116		ffnfv 6974	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ↔ ((recs(𝐹) ↾ 𝑥) Fn 𝑥 ∧ ∀𝑦 ∈ 𝑥 ((recs(𝐹) ↾ 𝑥)‘𝑦) ∈ 𝐴))
117	108, 115, 116	sylanbrc 582	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (recs(𝐹) ↾ 𝑥):𝑥⟶𝐴)
118		eleq2 2827	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 ⊢ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 → (𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ 𝐴))
119	118	biimpar 477	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 ⊢ ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝑡 ∈ 𝐴) → 𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
120	119	adantrl 712	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ⊢ ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ (𝐴 ∈ On ∧ 𝑡 ∈ 𝐴)) → 𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
121	120	3adant1 1128	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ (𝐴 ∈ On ∧ 𝑡 ∈ 𝐴)) → 𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
122		onelon 6276	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 ⊢ ((𝐴 ∈ On ∧ 𝑡 ∈ 𝐴) → 𝑡 ∈ On)
123	110	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ 𝑦 ∈ 𝑥) → ((recs(𝐹) ↾ 𝑥)‘𝑦) = (recs(𝐹)‘𝑦))
124		ffvelrn 6941	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ 𝑦 ∈ 𝑥) → ((recs(𝐹) ↾ 𝑥)‘𝑦) ∈ 𝐴)
125	123, 124	eqeltrrd 2840	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ 𝑦 ∈ 𝑥) → (recs(𝐹)‘𝑦) ∈ 𝐴)
126	125, 90	sylan2 592	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 ⊢ ((𝐴 ∈ On ∧ ((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ 𝑦 ∈ 𝑥)) → (recs(𝐹)‘𝑦) ∈ On)
127	126	adantlr 711	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 ⊢ (((𝐴 ∈ On ∧ 𝑡 ∈ 𝐴) ∧ ((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ 𝑦 ∈ 𝑥)) → (recs(𝐹)‘𝑦) ∈ On)
128		onsssuc 6338	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 ⊢ ((𝑡 ∈ On ∧ (recs(𝐹)‘𝑦) ∈ On) → (𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ suc (recs(𝐹)‘𝑦)))
129	122, 127, 128	syl2an2r 681	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 ⊢ (((𝐴 ∈ On ∧ 𝑡 ∈ 𝐴) ∧ ((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ 𝑦 ∈ 𝑥)) → (𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ suc (recs(𝐹)‘𝑦)))
130	129	anassrs 467	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 ⊢ ((((𝐴 ∈ On ∧ 𝑡 ∈ 𝐴) ∧ (recs(𝐹) ↾ 𝑥):𝑥⟶𝐴) ∧ 𝑦 ∈ 𝑥) → (𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ suc (recs(𝐹)‘𝑦)))
131	130	rexbidva 3224	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 ⊢ (((𝐴 ∈ On ∧ 𝑡 ∈ 𝐴) ∧ (recs(𝐹) ↾ 𝑥):𝑥⟶𝐴) → (∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ ∃𝑦 ∈ 𝑥 𝑡 ∈ suc (recs(𝐹)‘𝑦)))
132		eliun 4925	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 ⊢ (𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ↔ ∃𝑦 ∈ 𝑥 𝑡 ∈ suc (recs(𝐹)‘𝑦))
133	131, 132	bitr4di 288	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 ⊢ (((𝐴 ∈ On ∧ 𝑡 ∈ 𝐴) ∧ (recs(𝐹) ↾ 𝑥):𝑥⟶𝐴) → (∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
134	133	ancoms 458	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ (𝐴 ∈ On ∧ 𝑡 ∈ 𝐴)) → (∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
135	134	3adant2 1129	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ (𝐴 ∈ On ∧ 𝑡 ∈ 𝐴)) → (∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦) ↔ 𝑡 ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
136	121, 135	mpbird 256	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ (𝐴 ∈ On ∧ 𝑡 ∈ 𝐴)) → ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))
137	136	3expa 1116	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ ((((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴) ∧ (𝐴 ∈ On ∧ 𝑡 ∈ 𝐴)) → ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))
138	137	anassrs 467	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ (((((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴) ∧ 𝐴 ∈ On) ∧ 𝑡 ∈ 𝐴) → ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))
139	138	ralrimiva 3107	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ ((((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴) ∧ 𝐴 ∈ On) → ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))
140	139	expl 457	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ ((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 → ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On) → ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦)))
141	117, 140	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On) → ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦)))
142	141	imp 406	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))
143		feq1 6565	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → (𝑓:𝑥⟶𝐴 ↔ (recs(𝐹) ↾ 𝑥):𝑥⟶𝐴))
144		fveq1 6755	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → (𝑓‘𝑦) = ((recs(𝐹) ↾ 𝑥)‘𝑦))
145	144	sseq2d 3949	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → (𝑡 ⊆ (𝑓‘𝑦) ↔ 𝑡 ⊆ ((recs(𝐹) ↾ 𝑥)‘𝑦)))
146	145	rexbidv 3225	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → (∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦) ↔ ∃𝑦 ∈ 𝑥 𝑡 ⊆ ((recs(𝐹) ↾ 𝑥)‘𝑦)))
147	110	sseq2d 3949	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ⊢ (𝑦 ∈ 𝑥 → (𝑡 ⊆ ((recs(𝐹) ↾ 𝑥)‘𝑦) ↔ 𝑡 ⊆ (recs(𝐹)‘𝑦)))
148	147	rexbiia 3176	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ⊢ (∃𝑦 ∈ 𝑥 𝑡 ⊆ ((recs(𝐹) ↾ 𝑥)‘𝑦) ↔ ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))
149	146, 148	bitrdi 286	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → (∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦) ↔ ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦)))
150	149	ralbidv 3120	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → (∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦) ↔ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦)))
151	143, 150	anbi12d 630	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ (𝑓 = (recs(𝐹) ↾ 𝑥) → ((𝑓:𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦)) ↔ ((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦))))
152	29, 151	spcev 3535	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (((recs(𝐹) ↾ 𝑥):𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (recs(𝐹)‘𝑦)) → ∃𝑓(𝑓:𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦)))
153	117, 142, 152	syl2an2r 681	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → ∃𝑓(𝑓:𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦)))
154		cfflb 9946	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ On) → (∃𝑓(𝑓:𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦)) → (cf‘𝐴) ⊆ 𝑥))
155	154	imp 406	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝐴 ∈ On ∧ 𝑥 ∈ On) ∧ ∃𝑓(𝑓:𝑥⟶𝐴 ∧ ∀𝑡 ∈ 𝐴 ∃𝑦 ∈ 𝑥 𝑡 ⊆ (𝑓‘𝑦))) → (cf‘𝐴) ⊆ 𝑥)
156	105, 106, 153, 155	syl21anc 834	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → (cf‘𝐴) ⊆ 𝑥)
157		ontri1 6285	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ (((cf‘𝐴) ∈ On ∧ 𝑥 ∈ On) → ((cf‘𝐴) ⊆ 𝑥 ↔ ¬ 𝑥 ∈ (cf‘𝐴)))
158	2, 3, 157	sylancr 586	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑥 ∈ (cf‘𝐴) → ((cf‘𝐴) ⊆ 𝑥 ↔ ¬ 𝑥 ∈ (cf‘𝐴)))
159	158	ad2antrr 722	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → ((cf‘𝐴) ⊆ 𝑥 ↔ ¬ 𝑥 ∈ (cf‘𝐴)))
160	156, 159	mpbid 231	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → ¬ 𝑥 ∈ (cf‘𝐴))
161	104, 160	pm2.21dd 194	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) ∧ (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On)) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴)
162	161	ex 412	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 ∧ 𝐴 ∈ On) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴))
163	162	expcomd 416	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (𝐴 ∈ On → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴)))
164	163	com12 32	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝐴 ∈ On → ((𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴)))
165	164	3impib 1114	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴 → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴))
166	103, 165	jaod 855	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ((∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴 ∨ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) = 𝐴) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴))
167	102, 166	sylbid 239	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ⊆ 𝐴 → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴))
168	89, 167	mpd 15	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴)
169	168	3adant1l 1174	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴)
170		ordunel 7649	. . . . . . . . . . . . . . . . 17 ⊢ ((Ord 𝐴 ∧ (𝑔‘𝑥) ∈ 𝐴 ∧ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) ∈ 𝐴) → ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)) ∈ 𝐴)
171	71, 75, 169, 170	syl3anc 1369	. . . . . . . . . . . . . . . 16 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)) ∈ 𝐴)
172	68, 171	eqeltrd 2839	. . . . . . . . . . . . . . 15 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴) ∧ ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴) → (𝐺‘𝑥) ∈ 𝐴)
173	172	3expia 1119	. . . . . . . . . . . . . 14 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) ∧ 𝑥 ∈ (cf‘𝐴)) → (∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴 → (𝐺‘𝑥) ∈ 𝐴))
174	173	3impa 1108	. . . . . . . . . . . . 13 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ 𝐴 → (𝐺‘𝑥) ∈ 𝐴))
175	18, 174	syldc 48	. . . . . . . . . . . 12 ⊢ (∀𝑦 ∈ 𝑥 ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ 𝐴) → ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑥) ∈ 𝐴))
176	175	a1i 11	. . . . . . . . . . 11 ⊢ (𝑥 ∈ On → (∀𝑦 ∈ 𝑥 ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑦 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ 𝐴) → ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑥) ∈ 𝐴)))
177	9, 176	tfis2 7678	. . . . . . . . . 10 ⊢ (𝑥 ∈ On → ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑥) ∈ 𝐴))
178	4, 177	mpcom 38	. . . . . . . . 9 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑥) ∈ 𝐴)
179	178	3expia 1119	. . . . . . . 8 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) → (𝑥 ∈ (cf‘𝐴) → (𝐺‘𝑥) ∈ 𝐴))
180	179	ralrimiv 3106	. . . . . . 7 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) → ∀𝑥 ∈ (cf‘𝐴)(𝐺‘𝑥) ∈ 𝐴)
181	2	onssi 7659	. . . . . . . . 9 ⊢ (cf‘𝐴) ⊆ On
182		fnssres 6539	. . . . . . . . . 10 ⊢ ((recs(𝐹) Fn On ∧ (cf‘𝐴) ⊆ On) → (recs(𝐹) ↾ (cf‘𝐴)) Fn (cf‘𝐴))
183	19	fneq1i 6514	. . . . . . . . . 10 ⊢ (𝐺 Fn (cf‘𝐴) ↔ (recs(𝐹) ↾ (cf‘𝐴)) Fn (cf‘𝐴))
184	182, 183	sylibr 233	. . . . . . . . 9 ⊢ ((recs(𝐹) Fn On ∧ (cf‘𝐴) ⊆ On) → 𝐺 Fn (cf‘𝐴))
185	24, 181, 184	mp2an 688	. . . . . . . 8 ⊢ 𝐺 Fn (cf‘𝐴)
186		ffnfv 6974	. . . . . . . 8 ⊢ (𝐺:(cf‘𝐴)⟶𝐴 ↔ (𝐺 Fn (cf‘𝐴) ∧ ∀𝑥 ∈ (cf‘𝐴)(𝐺‘𝑥) ∈ 𝐴))
187	185, 186	mpbiran 705	. . . . . . 7 ⊢ (𝐺:(cf‘𝐴)⟶𝐴 ↔ ∀𝑥 ∈ (cf‘𝐴)(𝐺‘𝑥) ∈ 𝐴)
188	180, 187	sylibr 233	. . . . . 6 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) → 𝐺:(cf‘𝐴)⟶𝐴)
189	188	adantlr 711	. . . . 5 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)) ∧ 𝐴 ∈ On) → 𝐺:(cf‘𝐴)⟶𝐴)
190		onss 7611	. . . . . . . 8 ⊢ (𝐴 ∈ On → 𝐴 ⊆ On)
191	190	adantl 481	. . . . . . 7 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) → 𝐴 ⊆ On)
192	2	onordi 6356	. . . . . . . 8 ⊢ Ord (cf‘𝐴)
193		fvex 6769	. . . . . . . . . . . . . . . . 17 ⊢ (recs(𝐹)‘𝑦) ∈ V
194	193	sucid 6330	. . . . . . . . . . . . . . . 16 ⊢ (recs(𝐹)‘𝑦) ∈ suc (recs(𝐹)‘𝑦)
195		fveq2 6756	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑡 = 𝑦 → (recs(𝐹)‘𝑡) = (recs(𝐹)‘𝑦))
196		suceq 6316	. . . . . . . . . . . . . . . . . . 19 ⊢ ((recs(𝐹)‘𝑡) = (recs(𝐹)‘𝑦) → suc (recs(𝐹)‘𝑡) = suc (recs(𝐹)‘𝑦))
197	195, 196	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑡 = 𝑦 → suc (recs(𝐹)‘𝑡) = suc (recs(𝐹)‘𝑦))
198	197	eliuni 4927	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑦 ∈ 𝑥 ∧ (recs(𝐹)‘𝑦) ∈ suc (recs(𝐹)‘𝑦)) → (recs(𝐹)‘𝑦) ∈ ∪ 𝑡 ∈ 𝑥 suc (recs(𝐹)‘𝑡))
199	198, 60	eleqtrrdi 2850	. . . . . . . . . . . . . . . 16 ⊢ ((𝑦 ∈ 𝑥 ∧ (recs(𝐹)‘𝑦) ∈ suc (recs(𝐹)‘𝑦)) → (recs(𝐹)‘𝑦) ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
200	194, 199	mpan2 687	. . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ 𝑥 → (recs(𝐹)‘𝑦) ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
201		elun2 4107	. . . . . . . . . . . . . . 15 ⊢ ((recs(𝐹)‘𝑦) ∈ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦) → (recs(𝐹)‘𝑦) ∈ ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
202	200, 201	syl 17	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ 𝑥 → (recs(𝐹)‘𝑦) ∈ ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
203	202	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → (recs(𝐹)‘𝑦) ∈ ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
204	3	adantl 481	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → 𝑥 ∈ On)
205	204, 65	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → (recs(𝐹)‘𝑥) = ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦)))
206	203, 205	eleqtrrd 2842	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → (recs(𝐹)‘𝑦) ∈ (recs(𝐹)‘𝑥))
207	22	adantl 481	. . . . . . . . . . . 12 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑥) = (recs(𝐹)‘𝑥))
208	206, 78, 207	3eltr4d 2854	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ 𝑥 ∧ 𝑥 ∈ (cf‘𝐴)) → (𝐺‘𝑦) ∈ (𝐺‘𝑥))
209	208	expcom 413	. . . . . . . . . 10 ⊢ (𝑥 ∈ (cf‘𝐴) → (𝑦 ∈ 𝑥 → (𝐺‘𝑦) ∈ (𝐺‘𝑥)))
210	209	ralrimiv 3106	. . . . . . . . 9 ⊢ (𝑥 ∈ (cf‘𝐴) → ∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ (𝐺‘𝑥))
211	210	rgen 3073	. . . . . . . 8 ⊢ ∀𝑥 ∈ (cf‘𝐴)∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ (𝐺‘𝑥)
212		issmo2 8151	. . . . . . . . 9 ⊢ (𝐺:(cf‘𝐴)⟶𝐴 → ((𝐴 ⊆ On ∧ Ord (cf‘𝐴) ∧ ∀𝑥 ∈ (cf‘𝐴)∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ (𝐺‘𝑥)) → Smo 𝐺))
213	212	com12 32	. . . . . . . 8 ⊢ ((𝐴 ⊆ On ∧ Ord (cf‘𝐴) ∧ ∀𝑥 ∈ (cf‘𝐴)∀𝑦 ∈ 𝑥 (𝐺‘𝑦) ∈ (𝐺‘𝑥)) → (𝐺:(cf‘𝐴)⟶𝐴 → Smo 𝐺))
214	192, 211, 213	mp3an23 1451	. . . . . . 7 ⊢ (𝐴 ⊆ On → (𝐺:(cf‘𝐴)⟶𝐴 → Smo 𝐺))
215	191, 188, 214	sylc 65	. . . . . 6 ⊢ ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ 𝐴 ∈ On) → Smo 𝐺)
216	215	adantlr 711	. . . . 5 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)) ∧ 𝐴 ∈ On) → Smo 𝐺)
217		fveq2 6756	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑤 → (𝑔‘𝑥) = (𝑔‘𝑤))
218		fveq2 6756	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑤 → (𝐺‘𝑥) = (𝐺‘𝑤))
219	217, 218	sseq12d 3950	. . . . . . . . . 10 ⊢ (𝑥 = 𝑤 → ((𝑔‘𝑥) ⊆ (𝐺‘𝑥) ↔ (𝑔‘𝑤) ⊆ (𝐺‘𝑤)))
220		ssun1 4102	. . . . . . . . . . 11 ⊢ (𝑔‘𝑥) ⊆ ((𝑔‘𝑥) ∪ ∪ 𝑦 ∈ 𝑥 suc (recs(𝐹)‘𝑦))
221	220, 67	sseqtrrid 3970	. . . . . . . . . 10 ⊢ (𝑥 ∈ (cf‘𝐴) → (𝑔‘𝑥) ⊆ (𝐺‘𝑥))
222	219, 221	vtoclga 3503	. . . . . . . . 9 ⊢ (𝑤 ∈ (cf‘𝐴) → (𝑔‘𝑤) ⊆ (𝐺‘𝑤))
223		sstr 3925	. . . . . . . . . 10 ⊢ ((𝑧 ⊆ (𝑔‘𝑤) ∧ (𝑔‘𝑤) ⊆ (𝐺‘𝑤)) → 𝑧 ⊆ (𝐺‘𝑤))
224	223	expcom 413	. . . . . . . . 9 ⊢ ((𝑔‘𝑤) ⊆ (𝐺‘𝑤) → (𝑧 ⊆ (𝑔‘𝑤) → 𝑧 ⊆ (𝐺‘𝑤)))
225	222, 224	syl 17	. . . . . . . 8 ⊢ (𝑤 ∈ (cf‘𝐴) → (𝑧 ⊆ (𝑔‘𝑤) → 𝑧 ⊆ (𝐺‘𝑤)))
226	225	reximia 3172	. . . . . . 7 ⊢ (∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤) → ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤))
227	226	ralimi 3086	. . . . . 6 ⊢ (∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤) → ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤))
228	227	ad2antlr 723	. . . . 5 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)) ∧ 𝐴 ∈ On) → ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤))
229		fnex 7075	. . . . . . 7 ⊢ ((𝐺 Fn (cf‘𝐴) ∧ (cf‘𝐴) ∈ On) → 𝐺 ∈ V)
230	185, 2, 229	mp2an 688	. . . . . 6 ⊢ 𝐺 ∈ V
231		feq1 6565	. . . . . . 7 ⊢ (𝑓 = 𝐺 → (𝑓:(cf‘𝐴)⟶𝐴 ↔ 𝐺:(cf‘𝐴)⟶𝐴))
232		smoeq 8152	. . . . . . 7 ⊢ (𝑓 = 𝐺 → (Smo 𝑓 ↔ Smo 𝐺))
233		fveq1 6755	. . . . . . . . . 10 ⊢ (𝑓 = 𝐺 → (𝑓‘𝑤) = (𝐺‘𝑤))
234	233	sseq2d 3949	. . . . . . . . 9 ⊢ (𝑓 = 𝐺 → (𝑧 ⊆ (𝑓‘𝑤) ↔ 𝑧 ⊆ (𝐺‘𝑤)))
235	234	rexbidv 3225	. . . . . . . 8 ⊢ (𝑓 = 𝐺 → (∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤) ↔ ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤)))
236	235	ralbidv 3120	. . . . . . 7 ⊢ (𝑓 = 𝐺 → (∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤) ↔ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤)))
237	231, 232, 236	3anbi123d 1434	. . . . . 6 ⊢ (𝑓 = 𝐺 → ((𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤)) ↔ (𝐺:(cf‘𝐴)⟶𝐴 ∧ Smo 𝐺 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤))))
238	230, 237	spcev 3535	. . . . 5 ⊢ ((𝐺:(cf‘𝐴)⟶𝐴 ∧ Smo 𝐺 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝐺‘𝑤)) → ∃𝑓(𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤)))
239	189, 216, 228, 238	syl3anc 1369	. . . 4 ⊢ (((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)) ∧ 𝐴 ∈ On) → ∃𝑓(𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤)))
240	239	expcom 413	. . 3 ⊢ (𝐴 ∈ On → ((𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)) → ∃𝑓(𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤))))
241	240	exlimdv 1937	. 2 ⊢ (𝐴 ∈ On → (∃𝑔(𝑔:(cf‘𝐴)–1-1→𝐴 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑔‘𝑤)) → ∃𝑓(𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤))))
242	1, 241	mpd 15	1 ⊢ (𝐴 ∈ On → ∃𝑓(𝑓:(cf‘𝐴)⟶𝐴 ∧ Smo 𝑓 ∧ ∀𝑧 ∈ 𝐴 ∃𝑤 ∈ (cf‘𝐴)𝑧 ⊆ (𝑓‘𝑤)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 ∨ wo 843 ∧ w3a 1085 = wceq 1539 ∃wex 1783 ∈ wcel 2108 ∀wral 3063 ∃wrex 3064 Vcvv 3422 ∪ cun 3881 ⊆ wss 3883 ∪ ciun 4921 ↦ cmpt 5153 dom cdm 5580 ↾ cres 5582 Ord word 6250 Oncon0 6251 suc csuc 6253 Fun wfun 6412 Fn wfn 6413 ⟶wf 6414 –1-1→wf1 6415 ‘cfv 6418 Smo wsmo 8147 recscrecs 8172 cfccf 9626

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566

This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-smo 8148 df-recs 8173 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 df-sdom 8694 df-card 9628 df-cf 9630 df-acn 9631

This theorem is referenced by: cfsmo 9958

W3C validator