Theorem ackbij2lem2 10168

Description: Lemma for ackbij2 10171. (Contributed by Stefan O'Rear, 18-Nov-2014.)

Hypotheses

Ref	Expression
ackbij.f	⊢ 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘∪ 𝑦 ∈ 𝑥 ({𝑦} × 𝒫 𝑦)))
ackbij.g	⊢ 𝐺 = (𝑥 ∈ V ↦ (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥 “ 𝑦))))

Assertion

Ref	Expression
ackbij2lem2	⊢ (𝐴 ∈ ω → (rec(𝐺, ∅)‘𝐴):(𝑅1‘𝐴)–1-1-onto→(card‘(𝑅1‘𝐴)))

Distinct variable groups:   𝑥,𝐹,𝑦   𝑥,𝐺,𝑦   𝑥,𝐴,𝑦

Proof of Theorem ackbij2lem2

Dummy variables 𝑎 𝑏 𝑐 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fveq2 6840	. . 3 ⊢ (𝑎 = ∅ → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘∅))
2		fveq2 6840	. . 3 ⊢ (𝑎 = ∅ → (𝑅1‘𝑎) = (𝑅1‘∅))
3		2fveq3 6845	. . 3 ⊢ (𝑎 = ∅ → (card‘(𝑅1‘𝑎)) = (card‘(𝑅1‘∅)))
4	1, 2, 3	f1oeq123d 6776	. 2 ⊢ (𝑎 = ∅ → ((rec(𝐺, ∅)‘𝑎):(𝑅1‘𝑎)–1-1-onto→(card‘(𝑅1‘𝑎)) ↔ (rec(𝐺, ∅)‘∅):(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅))))
5		fveq2 6840	. . 3 ⊢ (𝑎 = 𝑏 → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘𝑏))
6		fveq2 6840	. . 3 ⊢ (𝑎 = 𝑏 → (𝑅1‘𝑎) = (𝑅1‘𝑏))
7		2fveq3 6845	. . 3 ⊢ (𝑎 = 𝑏 → (card‘(𝑅1‘𝑎)) = (card‘(𝑅1‘𝑏)))
8	5, 6, 7	f1oeq123d 6776	. 2 ⊢ (𝑎 = 𝑏 → ((rec(𝐺, ∅)‘𝑎):(𝑅1‘𝑎)–1-1-onto→(card‘(𝑅1‘𝑎)) ↔ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))))
9		fveq2 6840	. . 3 ⊢ (𝑎 = suc 𝑏 → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘suc 𝑏))
10		fveq2 6840	. . 3 ⊢ (𝑎 = suc 𝑏 → (𝑅1‘𝑎) = (𝑅1‘suc 𝑏))
11		2fveq3 6845	. . 3 ⊢ (𝑎 = suc 𝑏 → (card‘(𝑅1‘𝑎)) = (card‘(𝑅1‘suc 𝑏)))
12	9, 10, 11	f1oeq123d 6776	. 2 ⊢ (𝑎 = suc 𝑏 → ((rec(𝐺, ∅)‘𝑎):(𝑅1‘𝑎)–1-1-onto→(card‘(𝑅1‘𝑎)) ↔ (rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏))))
13		fveq2 6840	. . 3 ⊢ (𝑎 = 𝐴 → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘𝐴))
14		fveq2 6840	. . 3 ⊢ (𝑎 = 𝐴 → (𝑅1‘𝑎) = (𝑅1‘𝐴))
15		2fveq3 6845	. . 3 ⊢ (𝑎 = 𝐴 → (card‘(𝑅1‘𝑎)) = (card‘(𝑅1‘𝐴)))
16	13, 14, 15	f1oeq123d 6776	. 2 ⊢ (𝑎 = 𝐴 → ((rec(𝐺, ∅)‘𝑎):(𝑅1‘𝑎)–1-1-onto→(card‘(𝑅1‘𝑎)) ↔ (rec(𝐺, ∅)‘𝐴):(𝑅1‘𝐴)–1-1-onto→(card‘(𝑅1‘𝐴))))
17		f1o0 6819	. . 3 ⊢ ∅:∅–1-1-onto→∅
18		0ex 5257	. . . . . 6 ⊢ ∅ ∈ V
19	18	rdg0 8366	. . . . 5 ⊢ (rec(𝐺, ∅)‘∅) = ∅
20		f1oeq1 6770	. . . . 5 ⊢ ((rec(𝐺, ∅)‘∅) = ∅ → ((rec(𝐺, ∅)‘∅):(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅)) ↔ ∅:(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅))))
21	19, 20	ax-mp 5	. . . 4 ⊢ ((rec(𝐺, ∅)‘∅):(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅)) ↔ ∅:(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅)))
22		r10 9697	. . . . 5 ⊢ (𝑅1‘∅) = ∅
23	22	fveq2i 6843	. . . . . 6 ⊢ (card‘(𝑅1‘∅)) = (card‘∅)
24		card0 9887	. . . . . 6 ⊢ (card‘∅) = ∅
25	23, 24	eqtri 2752	. . . . 5 ⊢ (card‘(𝑅1‘∅)) = ∅
26		f1oeq23 6773	. . . . 5 ⊢ (((𝑅1‘∅) = ∅ ∧ (card‘(𝑅1‘∅)) = ∅) → (∅:(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅)) ↔ ∅:∅–1-1-onto→∅))
27	22, 25, 26	mp2an 692	. . . 4 ⊢ (∅:(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅)) ↔ ∅:∅–1-1-onto→∅)
28	21, 27	bitri 275	. . 3 ⊢ ((rec(𝐺, ∅)‘∅):(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅)) ↔ ∅:∅–1-1-onto→∅)
29	17, 28	mpbir 231	. 2 ⊢ (rec(𝐺, ∅)‘∅):(𝑅1‘∅)–1-1-onto→(card‘(𝑅1‘∅))
30		ackbij.f	. . . . . . . . . 10 ⊢ 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘∪ 𝑦 ∈ 𝑥 ({𝑦} × 𝒫 𝑦)))
31	30	ackbij1lem17 10164	. . . . . . . . 9 ⊢ 𝐹:(𝒫 ω ∩ Fin)–1-1→ω
32	31	a1i 11	. . . . . . . 8 ⊢ (𝑏 ∈ ω → 𝐹:(𝒫 ω ∩ Fin)–1-1→ω)
33		r1fin 9702	. . . . . . . . . 10 ⊢ (𝑏 ∈ ω → (𝑅1‘𝑏) ∈ Fin)
34		ficardom 9890	. . . . . . . . . 10 ⊢ ((𝑅1‘𝑏) ∈ Fin → (card‘(𝑅1‘𝑏)) ∈ ω)
35	33, 34	syl 17	. . . . . . . . 9 ⊢ (𝑏 ∈ ω → (card‘(𝑅1‘𝑏)) ∈ ω)
36		ackbij2lem1 10147	. . . . . . . . 9 ⊢ ((card‘(𝑅1‘𝑏)) ∈ ω → 𝒫 (card‘(𝑅1‘𝑏)) ⊆ (𝒫 ω ∩ Fin))
37	35, 36	syl 17	. . . . . . . 8 ⊢ (𝑏 ∈ ω → 𝒫 (card‘(𝑅1‘𝑏)) ⊆ (𝒫 ω ∩ Fin))
38		f1ores 6796	. . . . . . . 8 ⊢ ((𝐹:(𝒫 ω ∩ Fin)–1-1→ω ∧ 𝒫 (card‘(𝑅1‘𝑏)) ⊆ (𝒫 ω ∩ Fin)) → (𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(𝐹 “ 𝒫 (card‘(𝑅1‘𝑏))))
39	32, 37, 38	syl2anc 584	. . . . . . 7 ⊢ (𝑏 ∈ ω → (𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(𝐹 “ 𝒫 (card‘(𝑅1‘𝑏))))
40	30	ackbij1b 10167	. . . . . . . . . 10 ⊢ ((card‘(𝑅1‘𝑏)) ∈ ω → (𝐹 “ 𝒫 (card‘(𝑅1‘𝑏))) = (card‘𝒫 (card‘(𝑅1‘𝑏))))
41	35, 40	syl 17	. . . . . . . . 9 ⊢ (𝑏 ∈ ω → (𝐹 “ 𝒫 (card‘(𝑅1‘𝑏))) = (card‘𝒫 (card‘(𝑅1‘𝑏))))
42		ficardid 9891	. . . . . . . . . 10 ⊢ ((𝑅1‘𝑏) ∈ Fin → (card‘(𝑅1‘𝑏)) ≈ (𝑅1‘𝑏))
43		pwen 9091	. . . . . . . . . 10 ⊢ ((card‘(𝑅1‘𝑏)) ≈ (𝑅1‘𝑏) → 𝒫 (card‘(𝑅1‘𝑏)) ≈ 𝒫 (𝑅1‘𝑏))
44		carden2b 9896	. . . . . . . . . 10 ⊢ (𝒫 (card‘(𝑅1‘𝑏)) ≈ 𝒫 (𝑅1‘𝑏) → (card‘𝒫 (card‘(𝑅1‘𝑏))) = (card‘𝒫 (𝑅1‘𝑏)))
45	33, 42, 43, 44	4syl 19	. . . . . . . . 9 ⊢ (𝑏 ∈ ω → (card‘𝒫 (card‘(𝑅1‘𝑏))) = (card‘𝒫 (𝑅1‘𝑏)))
46	41, 45	eqtrd 2764	. . . . . . . 8 ⊢ (𝑏 ∈ ω → (𝐹 “ 𝒫 (card‘(𝑅1‘𝑏))) = (card‘𝒫 (𝑅1‘𝑏)))
47	46	f1oeq3d 6779	. . . . . . 7 ⊢ (𝑏 ∈ ω → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(𝐹 “ 𝒫 (card‘(𝑅1‘𝑏))) ↔ (𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(card‘𝒫 (𝑅1‘𝑏))))
48	39, 47	mpbid 232	. . . . . 6 ⊢ (𝑏 ∈ ω → (𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(card‘𝒫 (𝑅1‘𝑏)))
49	48	adantr 480	. . . . 5 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(card‘𝒫 (𝑅1‘𝑏)))
50		f1opw 7625	. . . . . 6 ⊢ ((rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏)) → (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)–1-1-onto→𝒫 (card‘(𝑅1‘𝑏)))
51	50	adantl 481	. . . . 5 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)–1-1-onto→𝒫 (card‘(𝑅1‘𝑏)))
52		f1oco 6805	. . . . 5 ⊢ (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))):𝒫 (card‘(𝑅1‘𝑏))–1-1-onto→(card‘𝒫 (𝑅1‘𝑏)) ∧ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)–1-1-onto→𝒫 (card‘(𝑅1‘𝑏))) → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏)))
53	49, 51, 52	syl2anc 584	. . . 4 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏)))
54		frsuc 8382	. . . . . . . . 9 ⊢ (𝑏 ∈ ω → ((rec(𝐺, ∅) ↾ ω)‘suc 𝑏) = (𝐺‘((rec(𝐺, ∅) ↾ ω)‘𝑏)))
55		peano2 7846	. . . . . . . . . 10 ⊢ (𝑏 ∈ ω → suc 𝑏 ∈ ω)
56	55	fvresd 6860	. . . . . . . . 9 ⊢ (𝑏 ∈ ω → ((rec(𝐺, ∅) ↾ ω)‘suc 𝑏) = (rec(𝐺, ∅)‘suc 𝑏))
57		fvres 6859	. . . . . . . . . . 11 ⊢ (𝑏 ∈ ω → ((rec(𝐺, ∅) ↾ ω)‘𝑏) = (rec(𝐺, ∅)‘𝑏))
58	57	fveq2d 6844	. . . . . . . . . 10 ⊢ (𝑏 ∈ ω → (𝐺‘((rec(𝐺, ∅) ↾ ω)‘𝑏)) = (𝐺‘(rec(𝐺, ∅)‘𝑏)))
59		fvex 6853	. . . . . . . . . . 11 ⊢ (rec(𝐺, ∅)‘𝑏) ∈ V
60		dmeq 5857	. . . . . . . . . . . . . 14 ⊢ (𝑥 = (rec(𝐺, ∅)‘𝑏) → dom 𝑥 = dom (rec(𝐺, ∅)‘𝑏))
61	60	pweqd 4576	. . . . . . . . . . . . 13 ⊢ (𝑥 = (rec(𝐺, ∅)‘𝑏) → 𝒫 dom 𝑥 = 𝒫 dom (rec(𝐺, ∅)‘𝑏))
62		imaeq1 6015	. . . . . . . . . . . . . 14 ⊢ (𝑥 = (rec(𝐺, ∅)‘𝑏) → (𝑥 “ 𝑦) = ((rec(𝐺, ∅)‘𝑏) “ 𝑦))
63	62	fveq2d 6844	. . . . . . . . . . . . 13 ⊢ (𝑥 = (rec(𝐺, ∅)‘𝑏) → (𝐹‘(𝑥 “ 𝑦)) = (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)))
64	61, 63	mpteq12dv 5189	. . . . . . . . . . . 12 ⊢ (𝑥 = (rec(𝐺, ∅)‘𝑏) → (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥 “ 𝑦))) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))))
65		ackbij.g	. . . . . . . . . . . 12 ⊢ 𝐺 = (𝑥 ∈ V ↦ (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥 “ 𝑦))))
66	59	dmex 7865	. . . . . . . . . . . . . 14 ⊢ dom (rec(𝐺, ∅)‘𝑏) ∈ V
67	66	pwex 5330	. . . . . . . . . . . . 13 ⊢ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ∈ V
68	67	mptex 7179	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) ∈ V
69	64, 65, 68	fvmpt 6950	. . . . . . . . . . 11 ⊢ ((rec(𝐺, ∅)‘𝑏) ∈ V → (𝐺‘(rec(𝐺, ∅)‘𝑏)) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))))
70	59, 69	ax-mp 5	. . . . . . . . . 10 ⊢ (𝐺‘(rec(𝐺, ∅)‘𝑏)) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)))
71	58, 70	eqtrdi 2780	. . . . . . . . 9 ⊢ (𝑏 ∈ ω → (𝐺‘((rec(𝐺, ∅) ↾ ω)‘𝑏)) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))))
72	54, 56, 71	3eqtr3d 2772	. . . . . . . 8 ⊢ (𝑏 ∈ ω → (rec(𝐺, ∅)‘suc 𝑏) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))))
73	72	adantr 480	. . . . . . 7 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (rec(𝐺, ∅)‘suc 𝑏) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))))
74		f1odm 6786	. . . . . . . . . . 11 ⊢ ((rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏)) → dom (rec(𝐺, ∅)‘𝑏) = (𝑅1‘𝑏))
75	74	adantl 481	. . . . . . . . . 10 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → dom (rec(𝐺, ∅)‘𝑏) = (𝑅1‘𝑏))
76	75	pweqd 4576	. . . . . . . . 9 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → 𝒫 dom (rec(𝐺, ∅)‘𝑏) = 𝒫 (𝑅1‘𝑏))
77	76	mpteq1d 5192	. . . . . . . 8 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) = (𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))))
78		fvex 6853	. . . . . . . . . . 11 ⊢ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)) ∈ V
79		eqid 2729	. . . . . . . . . . 11 ⊢ (𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) = (𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)))
80	78, 79	fnmpti 6643	. . . . . . . . . 10 ⊢ (𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) Fn 𝒫 (𝑅1‘𝑏)
81	80	a1i 11	. . . . . . . . 9 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) Fn 𝒫 (𝑅1‘𝑏))
82		f1ofn 6783	. . . . . . . . . 10 ⊢ (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏)) → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))) Fn 𝒫 (𝑅1‘𝑏))
83	53, 82	syl 17	. . . . . . . . 9 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))) Fn 𝒫 (𝑅1‘𝑏))
84		f1of 6782	. . . . . . . . . . . . . 14 ⊢ ((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)–1-1-onto→𝒫 (card‘(𝑅1‘𝑏)) → (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)⟶𝒫 (card‘(𝑅1‘𝑏)))
85	51, 84	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)⟶𝒫 (card‘(𝑅1‘𝑏)))
86	85	ffvelcdmda 7038	. . . . . . . . . . . 12 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → ((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐) ∈ 𝒫 (card‘(𝑅1‘𝑏)))
87	86	fvresd 6860	. . . . . . . . . . 11 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏)))‘((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐)) = (𝐹‘((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐)))
88		imaeq2 6016	. . . . . . . . . . . . . 14 ⊢ (𝑎 = 𝑐 → ((rec(𝐺, ∅)‘𝑏) “ 𝑎) = ((rec(𝐺, ∅)‘𝑏) “ 𝑐))
89		eqid 2729	. . . . . . . . . . . . . 14 ⊢ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)) = (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))
90	59	imaex 7870	. . . . . . . . . . . . . 14 ⊢ ((rec(𝐺, ∅)‘𝑏) “ 𝑐) ∈ V
91	88, 89, 90	fvmpt 6950	. . . . . . . . . . . . 13 ⊢ (𝑐 ∈ 𝒫 (𝑅1‘𝑏) → ((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐) = ((rec(𝐺, ∅)‘𝑏) “ 𝑐))
92	91	adantl 481	. . . . . . . . . . . 12 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → ((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐) = ((rec(𝐺, ∅)‘𝑏) “ 𝑐))
93	92	fveq2d 6844	. . . . . . . . . . 11 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → (𝐹‘((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐)) = (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑐)))
94	87, 93	eqtrd 2764	. . . . . . . . . 10 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏)))‘((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐)) = (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑐)))
95		fvco3 6942	. . . . . . . . . . 11 ⊢ (((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)):𝒫 (𝑅1‘𝑏)⟶𝒫 (card‘(𝑅1‘𝑏)) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)))‘𝑐) = ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏)))‘((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐)))
96	85, 95	sylan 580	. . . . . . . . . 10 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)))‘𝑐) = ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏)))‘((𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))‘𝑐)))
97		imaeq2 6016	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑐 → ((rec(𝐺, ∅)‘𝑏) “ 𝑦) = ((rec(𝐺, ∅)‘𝑏) “ 𝑐))
98	97	fveq2d 6844	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑐 → (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)) = (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑐)))
99		fvex 6853	. . . . . . . . . . . 12 ⊢ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑐)) ∈ V
100	98, 79, 99	fvmpt 6950	. . . . . . . . . . 11 ⊢ (𝑐 ∈ 𝒫 (𝑅1‘𝑏) → ((𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)))‘𝑐) = (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑐)))
101	100	adantl 481	. . . . . . . . . 10 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → ((𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)))‘𝑐) = (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑐)))
102	94, 96, 101	3eqtr4rd 2775	. . . . . . . . 9 ⊢ (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) ∧ 𝑐 ∈ 𝒫 (𝑅1‘𝑏)) → ((𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦)))‘𝑐) = (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎)))‘𝑐))
103	81, 83, 102	eqfnfvd 6988	. . . . . . . 8 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝑦 ∈ 𝒫 (𝑅1‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) = ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))))
104	77, 103	eqtrd 2764	. . . . . . 7 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘𝑏) “ 𝑦))) = ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))))
105	73, 104	eqtrd 2764	. . . . . 6 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (rec(𝐺, ∅)‘suc 𝑏) = ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))))
106		f1oeq1 6770	. . . . . 6 ⊢ ((rec(𝐺, ∅)‘suc 𝑏) = ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))) → ((rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) ↔ ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏))))
107	105, 106	syl 17	. . . . 5 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → ((rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) ↔ ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏))))
108		nnon 7828	. . . . . . . 8 ⊢ (𝑏 ∈ ω → 𝑏 ∈ On)
109		r1suc 9699	. . . . . . . 8 ⊢ (𝑏 ∈ On → (𝑅1‘suc 𝑏) = 𝒫 (𝑅1‘𝑏))
110	108, 109	syl 17	. . . . . . 7 ⊢ (𝑏 ∈ ω → (𝑅1‘suc 𝑏) = 𝒫 (𝑅1‘𝑏))
111	110	fveq2d 6844	. . . . . . 7 ⊢ (𝑏 ∈ ω → (card‘(𝑅1‘suc 𝑏)) = (card‘𝒫 (𝑅1‘𝑏)))
112		f1oeq23 6773	. . . . . . 7 ⊢ (((𝑅1‘suc 𝑏) = 𝒫 (𝑅1‘𝑏) ∧ (card‘(𝑅1‘suc 𝑏)) = (card‘𝒫 (𝑅1‘𝑏))) → (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) ↔ ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏))))
113	110, 111, 112	syl2anc 584	. . . . . 6 ⊢ (𝑏 ∈ ω → (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) ↔ ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏))))
114	113	adantr 480	. . . . 5 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) ↔ ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏))))
115	107, 114	bitrd 279	. . . 4 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → ((rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) ↔ ((𝐹 ↾ 𝒫 (card‘(𝑅1‘𝑏))) ∘ (𝑎 ∈ 𝒫 (𝑅1‘𝑏) ↦ ((rec(𝐺, ∅)‘𝑏) “ 𝑎))):𝒫 (𝑅1‘𝑏)–1-1-onto→(card‘𝒫 (𝑅1‘𝑏))))
116	53, 115	mpbird 257	. . 3 ⊢ ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏))) → (rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)))
117	116	ex 412	. 2 ⊢ (𝑏 ∈ ω → ((rec(𝐺, ∅)‘𝑏):(𝑅1‘𝑏)–1-1-onto→(card‘(𝑅1‘𝑏)) → (rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏))))
118	4, 8, 12, 16, 29, 117	finds 7852	1 ⊢ (𝐴 ∈ ω → (rec(𝐺, ∅)‘𝐴):(𝑅1‘𝐴)–1-1-onto→(card‘(𝑅1‘𝐴)))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1540   ∈ wcel 2109  Vcvv 3444   ∩ cin 3910   ⊆ wss 3911  ∅c0 4292  𝒫 cpw 4559  {csn 4585  ∪ ciun 4951   class class class wbr 5102   ↦ cmpt 5183   × cxp 5629  dom cdm 5631   ↾ cres 5633   “ cima 5634   ∘ ccom 5635  Oncon0 6320  suc csuc 6322   Fn wfn 6494  ⟶wf 6495  –1-1→wf1 6496  –1-1-onto→wf1o 6498  ‘cfv 6499  ωcom 7822  reccrdg 8354   ≈ cen 8892  Fincfn 8895  𝑅₁cr1 9691  cardccrd 9864

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5229  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382  ax-un 7691

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3352  df-rab 3403  df-v 3446  df-sbc 3751  df-csb 3860  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-pss 3931  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-int 4907  df-iun 4953  df-br 5103  df-opab 5165  df-mpt 5184  df-tr 5210  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6262  df-ord 6323  df-on 6324  df-lim 6325  df-suc 6326  df-iota 6452  df-fun 6501  df-fn 6502  df-f 6503  df-f1 6504  df-fo 6505  df-f1o 6506  df-fv 6507  df-ov 7372  df-oprab 7373  df-mpo 7374  df-om 7823  df-1st 7947  df-2nd 7948  df-frecs 8237  df-wrecs 8268  df-recs 8317  df-rdg 8355  df-1o 8411  df-2o 8412  df-oadd 8415  df-er 8648  df-map 8778  df-en 8896  df-dom 8897  df-sdom 8898  df-fin 8899  df-r1 9693  df-dju 9830  df-card 9868

This theorem is referenced by:  ackbij2lem3  10169  ackbij2  10171