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Theorem ackbij2lem3 9015
Description: Lemma for ackbij2 9017. (Contributed by Stefan O'Rear, 18-Nov-2014.)
Hypotheses
Ref Expression
ackbij.f 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘ 𝑦𝑥 ({𝑦} × 𝒫 𝑦)))
ackbij.g 𝐺 = (𝑥 ∈ V ↦ (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥𝑦))))
Assertion
Ref Expression
ackbij2lem3 (𝐴 ∈ ω → (rec(𝐺, ∅)‘𝐴) ⊆ (rec(𝐺, ∅)‘suc 𝐴))
Distinct variable groups:   𝑥,𝐹,𝑦   𝑥,𝐺,𝑦   𝑥,𝐴,𝑦

Proof of Theorem ackbij2lem3
Dummy variables 𝑎 𝑏 𝑐 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fveq2 6153 . . . 4 (𝑎 = ∅ → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘∅))
2 suceq 5754 . . . . . 6 (𝑎 = ∅ → suc 𝑎 = suc ∅)
32fveq2d 6157 . . . . 5 (𝑎 = ∅ → (rec(𝐺, ∅)‘suc 𝑎) = (rec(𝐺, ∅)‘suc ∅))
4 fveq2 6153 . . . . 5 (𝑎 = ∅ → (𝑅1𝑎) = (𝑅1‘∅))
53, 4reseq12d 5362 . . . 4 (𝑎 = ∅ → ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) = ((rec(𝐺, ∅)‘suc ∅) ↾ (𝑅1‘∅)))
61, 5eqeq12d 2636 . . 3 (𝑎 = ∅ → ((rec(𝐺, ∅)‘𝑎) = ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) ↔ (rec(𝐺, ∅)‘∅) = ((rec(𝐺, ∅)‘suc ∅) ↾ (𝑅1‘∅))))
7 fveq2 6153 . . . 4 (𝑎 = 𝑏 → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘𝑏))
8 suceq 5754 . . . . . 6 (𝑎 = 𝑏 → suc 𝑎 = suc 𝑏)
98fveq2d 6157 . . . . 5 (𝑎 = 𝑏 → (rec(𝐺, ∅)‘suc 𝑎) = (rec(𝐺, ∅)‘suc 𝑏))
10 fveq2 6153 . . . . 5 (𝑎 = 𝑏 → (𝑅1𝑎) = (𝑅1𝑏))
119, 10reseq12d 5362 . . . 4 (𝑎 = 𝑏 → ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))
127, 11eqeq12d 2636 . . 3 (𝑎 = 𝑏 → ((rec(𝐺, ∅)‘𝑎) = ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) ↔ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))))
13 fveq2 6153 . . . 4 (𝑎 = suc 𝑏 → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘suc 𝑏))
14 suceq 5754 . . . . . 6 (𝑎 = suc 𝑏 → suc 𝑎 = suc suc 𝑏)
1514fveq2d 6157 . . . . 5 (𝑎 = suc 𝑏 → (rec(𝐺, ∅)‘suc 𝑎) = (rec(𝐺, ∅)‘suc suc 𝑏))
16 fveq2 6153 . . . . 5 (𝑎 = suc 𝑏 → (𝑅1𝑎) = (𝑅1‘suc 𝑏))
1715, 16reseq12d 5362 . . . 4 (𝑎 = suc 𝑏 → ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) = ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏)))
1813, 17eqeq12d 2636 . . 3 (𝑎 = suc 𝑏 → ((rec(𝐺, ∅)‘𝑎) = ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) ↔ (rec(𝐺, ∅)‘suc 𝑏) = ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏))))
19 fveq2 6153 . . . 4 (𝑎 = 𝐴 → (rec(𝐺, ∅)‘𝑎) = (rec(𝐺, ∅)‘𝐴))
20 suceq 5754 . . . . . 6 (𝑎 = 𝐴 → suc 𝑎 = suc 𝐴)
2120fveq2d 6157 . . . . 5 (𝑎 = 𝐴 → (rec(𝐺, ∅)‘suc 𝑎) = (rec(𝐺, ∅)‘suc 𝐴))
22 fveq2 6153 . . . . 5 (𝑎 = 𝐴 → (𝑅1𝑎) = (𝑅1𝐴))
2321, 22reseq12d 5362 . . . 4 (𝑎 = 𝐴 → ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) = ((rec(𝐺, ∅)‘suc 𝐴) ↾ (𝑅1𝐴)))
2419, 23eqeq12d 2636 . . 3 (𝑎 = 𝐴 → ((rec(𝐺, ∅)‘𝑎) = ((rec(𝐺, ∅)‘suc 𝑎) ↾ (𝑅1𝑎)) ↔ (rec(𝐺, ∅)‘𝐴) = ((rec(𝐺, ∅)‘suc 𝐴) ↾ (𝑅1𝐴))))
25 res0 5365 . . . 4 ((rec(𝐺, ∅)‘suc ∅) ↾ ∅) = ∅
26 r10 8583 . . . . 5 (𝑅1‘∅) = ∅
2726reseq2i 5358 . . . 4 ((rec(𝐺, ∅)‘suc ∅) ↾ (𝑅1‘∅)) = ((rec(𝐺, ∅)‘suc ∅) ↾ ∅)
28 0ex 4755 . . . . 5 ∅ ∈ V
2928rdg0 7469 . . . 4 (rec(𝐺, ∅)‘∅) = ∅
3025, 27, 293eqtr4ri 2654 . . 3 (rec(𝐺, ∅)‘∅) = ((rec(𝐺, ∅)‘suc ∅) ↾ (𝑅1‘∅))
31 peano2 7040 . . . . . . . 8 (𝑏 ∈ ω → suc 𝑏 ∈ ω)
32 ackbij.f . . . . . . . . 9 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘ 𝑦𝑥 ({𝑦} × 𝒫 𝑦)))
33 ackbij.g . . . . . . . . 9 𝐺 = (𝑥 ∈ V ↦ (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥𝑦))))
3432, 33ackbij2lem2 9014 . . . . . . . 8 (suc 𝑏 ∈ ω → (rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)))
3531, 34syl 17 . . . . . . 7 (𝑏 ∈ ω → (rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)))
36 f1ofn 6100 . . . . . . 7 ((rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) → (rec(𝐺, ∅)‘suc 𝑏) Fn (𝑅1‘suc 𝑏))
3735, 36syl 17 . . . . . 6 (𝑏 ∈ ω → (rec(𝐺, ∅)‘suc 𝑏) Fn (𝑅1‘suc 𝑏))
3837adantr 481 . . . . 5 ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) → (rec(𝐺, ∅)‘suc 𝑏) Fn (𝑅1‘suc 𝑏))
39 peano2 7040 . . . . . . . 8 (suc 𝑏 ∈ ω → suc suc 𝑏 ∈ ω)
4032, 33ackbij2lem2 9014 . . . . . . . 8 (suc suc 𝑏 ∈ ω → (rec(𝐺, ∅)‘suc suc 𝑏):(𝑅1‘suc suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc suc 𝑏)))
41 f1ofn 6100 . . . . . . . 8 ((rec(𝐺, ∅)‘suc suc 𝑏):(𝑅1‘suc suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc suc 𝑏)) → (rec(𝐺, ∅)‘suc suc 𝑏) Fn (𝑅1‘suc suc 𝑏))
4231, 39, 40, 414syl 19 . . . . . . 7 (𝑏 ∈ ω → (rec(𝐺, ∅)‘suc suc 𝑏) Fn (𝑅1‘suc suc 𝑏))
43 nnon 7025 . . . . . . . . 9 (suc 𝑏 ∈ ω → suc 𝑏 ∈ On)
4431, 43syl 17 . . . . . . . 8 (𝑏 ∈ ω → suc 𝑏 ∈ On)
45 r1sssuc 8598 . . . . . . . 8 (suc 𝑏 ∈ On → (𝑅1‘suc 𝑏) ⊆ (𝑅1‘suc suc 𝑏))
4644, 45syl 17 . . . . . . 7 (𝑏 ∈ ω → (𝑅1‘suc 𝑏) ⊆ (𝑅1‘suc suc 𝑏))
47 fnssres 5967 . . . . . . 7 (((rec(𝐺, ∅)‘suc suc 𝑏) Fn (𝑅1‘suc suc 𝑏) ∧ (𝑅1‘suc 𝑏) ⊆ (𝑅1‘suc suc 𝑏)) → ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏)) Fn (𝑅1‘suc 𝑏))
4842, 46, 47syl2anc 692 . . . . . 6 (𝑏 ∈ ω → ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏)) Fn (𝑅1‘suc 𝑏))
4948adantr 481 . . . . 5 ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) → ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏)) Fn (𝑅1‘suc 𝑏))
50 nnon 7025 . . . . . . . . . . . . . . 15 (𝑏 ∈ ω → 𝑏 ∈ On)
51 r1suc 8585 . . . . . . . . . . . . . . 15 (𝑏 ∈ On → (𝑅1‘suc 𝑏) = 𝒫 (𝑅1𝑏))
5250, 51syl 17 . . . . . . . . . . . . . 14 (𝑏 ∈ ω → (𝑅1‘suc 𝑏) = 𝒫 (𝑅1𝑏))
5352eleq2d 2684 . . . . . . . . . . . . 13 (𝑏 ∈ ω → (𝑐 ∈ (𝑅1‘suc 𝑏) ↔ 𝑐 ∈ 𝒫 (𝑅1𝑏)))
5453biimpa 501 . . . . . . . . . . . 12 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝑐 ∈ 𝒫 (𝑅1𝑏))
5554elpwid 4146 . . . . . . . . . . 11 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝑐 ⊆ (𝑅1𝑏))
56 resima2 5396 . . . . . . . . . . 11 (𝑐 ⊆ (𝑅1𝑏) → (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐) = ((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐))
5755, 56syl 17 . . . . . . . . . 10 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐) = ((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐))
5857fveq2d 6157 . . . . . . . . 9 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐)) = (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐)))
59 fvex 6163 . . . . . . . . . . . . 13 (rec(𝐺, ∅)‘suc 𝑏) ∈ V
6059resex 5407 . . . . . . . . . . . 12 ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ∈ V
61 dmeq 5289 . . . . . . . . . . . . . . 15 (𝑥 = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → dom 𝑥 = dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))
6261pweqd 4140 . . . . . . . . . . . . . 14 (𝑥 = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → 𝒫 dom 𝑥 = 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))
63 imaeq1 5425 . . . . . . . . . . . . . . 15 (𝑥 = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → (𝑥𝑦) = (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦))
6463fveq2d 6157 . . . . . . . . . . . . . 14 (𝑥 = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → (𝐹‘(𝑥𝑦)) = (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)))
6562, 64mpteq12dv 4698 . . . . . . . . . . . . 13 (𝑥 = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥𝑦))) = (𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦))))
6660dmex 7053 . . . . . . . . . . . . . . 15 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ∈ V
6766pwex 4813 . . . . . . . . . . . . . 14 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ∈ V
6867mptex 6446 . . . . . . . . . . . . 13 (𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦))) ∈ V
6965, 33, 68fvmpt 6244 . . . . . . . . . . . 12 (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ∈ V → (𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) = (𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦))))
7060, 69ax-mp 5 . . . . . . . . . . 11 (𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) = (𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)))
7170fveq1i 6154 . . . . . . . . . 10 ((𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))‘𝑐) = ((𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)))‘𝑐)
72 r1sssuc 8598 . . . . . . . . . . . . . . . . 17 (𝑏 ∈ On → (𝑅1𝑏) ⊆ (𝑅1‘suc 𝑏))
7350, 72syl 17 . . . . . . . . . . . . . . . 16 (𝑏 ∈ ω → (𝑅1𝑏) ⊆ (𝑅1‘suc 𝑏))
74 fnssres 5967 . . . . . . . . . . . . . . . 16 (((rec(𝐺, ∅)‘suc 𝑏) Fn (𝑅1‘suc 𝑏) ∧ (𝑅1𝑏) ⊆ (𝑅1‘suc 𝑏)) → ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) Fn (𝑅1𝑏))
7537, 73, 74syl2anc 692 . . . . . . . . . . . . . . 15 (𝑏 ∈ ω → ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) Fn (𝑅1𝑏))
76 fndm 5953 . . . . . . . . . . . . . . 15 (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) Fn (𝑅1𝑏) → dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) = (𝑅1𝑏))
7775, 76syl 17 . . . . . . . . . . . . . 14 (𝑏 ∈ ω → dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) = (𝑅1𝑏))
7877pweqd 4140 . . . . . . . . . . . . 13 (𝑏 ∈ ω → 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) = 𝒫 (𝑅1𝑏))
7978adantr 481 . . . . . . . . . . . 12 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) = 𝒫 (𝑅1𝑏))
8054, 79eleqtrrd 2701 . . . . . . . . . . 11 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝑐 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))
81 imaeq2 5426 . . . . . . . . . . . . 13 (𝑦 = 𝑐 → (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦) = (((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐))
8281fveq2d 6157 . . . . . . . . . . . 12 (𝑦 = 𝑐 → (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)) = (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐)))
83 eqid 2621 . . . . . . . . . . . 12 (𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦))) = (𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)))
84 fvex 6163 . . . . . . . . . . . 12 (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐)) ∈ V
8582, 83, 84fvmpt 6244 . . . . . . . . . . 11 (𝑐 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → ((𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)))‘𝑐) = (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐)))
8680, 85syl 17 . . . . . . . . . 10 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝑦 ∈ 𝒫 dom ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) ↦ (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑦)))‘𝑐) = (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐)))
8771, 86syl5eq 2667 . . . . . . . . 9 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))‘𝑐) = (𝐹‘(((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) “ 𝑐)))
88 dmeq 5289 . . . . . . . . . . . . . . 15 (𝑥 = (rec(𝐺, ∅)‘suc 𝑏) → dom 𝑥 = dom (rec(𝐺, ∅)‘suc 𝑏))
8988pweqd 4140 . . . . . . . . . . . . . 14 (𝑥 = (rec(𝐺, ∅)‘suc 𝑏) → 𝒫 dom 𝑥 = 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏))
90 imaeq1 5425 . . . . . . . . . . . . . . 15 (𝑥 = (rec(𝐺, ∅)‘suc 𝑏) → (𝑥𝑦) = ((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦))
9190fveq2d 6157 . . . . . . . . . . . . . 14 (𝑥 = (rec(𝐺, ∅)‘suc 𝑏) → (𝐹‘(𝑥𝑦)) = (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)))
9289, 91mpteq12dv 4698 . . . . . . . . . . . . 13 (𝑥 = (rec(𝐺, ∅)‘suc 𝑏) → (𝑦 ∈ 𝒫 dom 𝑥 ↦ (𝐹‘(𝑥𝑦))) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦))))
9359dmex 7053 . . . . . . . . . . . . . . 15 dom (rec(𝐺, ∅)‘suc 𝑏) ∈ V
9493pwex 4813 . . . . . . . . . . . . . 14 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ∈ V
9594mptex 6446 . . . . . . . . . . . . 13 (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦))) ∈ V
9692, 33, 95fvmpt 6244 . . . . . . . . . . . 12 ((rec(𝐺, ∅)‘suc 𝑏) ∈ V → (𝐺‘(rec(𝐺, ∅)‘suc 𝑏)) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦))))
9759, 96ax-mp 5 . . . . . . . . . . 11 (𝐺‘(rec(𝐺, ∅)‘suc 𝑏)) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)))
9897fveq1i 6154 . . . . . . . . . 10 ((𝐺‘(rec(𝐺, ∅)‘suc 𝑏))‘𝑐) = ((𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)))‘𝑐)
99 r1tr 8591 . . . . . . . . . . . . . . 15 Tr (𝑅1‘suc 𝑏)
10099a1i 11 . . . . . . . . . . . . . 14 (𝑏 ∈ ω → Tr (𝑅1‘suc 𝑏))
101 dftr4 4722 . . . . . . . . . . . . . 14 (Tr (𝑅1‘suc 𝑏) ↔ (𝑅1‘suc 𝑏) ⊆ 𝒫 (𝑅1‘suc 𝑏))
102100, 101sylib 208 . . . . . . . . . . . . 13 (𝑏 ∈ ω → (𝑅1‘suc 𝑏) ⊆ 𝒫 (𝑅1‘suc 𝑏))
103102sselda 3587 . . . . . . . . . . . 12 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝑐 ∈ 𝒫 (𝑅1‘suc 𝑏))
104 f1odm 6103 . . . . . . . . . . . . . . 15 ((rec(𝐺, ∅)‘suc 𝑏):(𝑅1‘suc 𝑏)–1-1-onto→(card‘(𝑅1‘suc 𝑏)) → dom (rec(𝐺, ∅)‘suc 𝑏) = (𝑅1‘suc 𝑏))
10535, 104syl 17 . . . . . . . . . . . . . 14 (𝑏 ∈ ω → dom (rec(𝐺, ∅)‘suc 𝑏) = (𝑅1‘suc 𝑏))
106105pweqd 4140 . . . . . . . . . . . . 13 (𝑏 ∈ ω → 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) = 𝒫 (𝑅1‘suc 𝑏))
107106adantr 481 . . . . . . . . . . . 12 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) = 𝒫 (𝑅1‘suc 𝑏))
108103, 107eleqtrrd 2701 . . . . . . . . . . 11 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → 𝑐 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏))
109 imaeq2 5426 . . . . . . . . . . . . 13 (𝑦 = 𝑐 → ((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦) = ((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐))
110109fveq2d 6157 . . . . . . . . . . . 12 (𝑦 = 𝑐 → (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)) = (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐)))
111 eqid 2621 . . . . . . . . . . . 12 (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦))) = (𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)))
112 fvex 6163 . . . . . . . . . . . 12 (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐)) ∈ V
113110, 111, 112fvmpt 6244 . . . . . . . . . . 11 (𝑐 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) → ((𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)))‘𝑐) = (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐)))
114108, 113syl 17 . . . . . . . . . 10 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝑦 ∈ 𝒫 dom (rec(𝐺, ∅)‘suc 𝑏) ↦ (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑦)))‘𝑐) = (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐)))
11598, 114syl5eq 2667 . . . . . . . . 9 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝐺‘(rec(𝐺, ∅)‘suc 𝑏))‘𝑐) = (𝐹‘((rec(𝐺, ∅)‘suc 𝑏) “ 𝑐)))
11658, 87, 1153eqtr4d 2665 . . . . . . . 8 ((𝑏 ∈ ω ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘suc 𝑏))‘𝑐))
117116adantlr 750 . . . . . . 7 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘suc 𝑏))‘𝑐))
118 fveq2 6153 . . . . . . . . 9 ((rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → (𝐺‘(rec(𝐺, ∅)‘𝑏)) = (𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))))
119118fveq1d 6155 . . . . . . . 8 ((rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → ((𝐺‘(rec(𝐺, ∅)‘𝑏))‘𝑐) = ((𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))‘𝑐))
120119ad2antlr 762 . . . . . . 7 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((𝐺‘(rec(𝐺, ∅)‘𝑏))‘𝑐) = ((𝐺‘((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)))‘𝑐))
121 rdgsuc 7472 . . . . . . . . . 10 (suc 𝑏 ∈ On → (rec(𝐺, ∅)‘suc suc 𝑏) = (𝐺‘(rec(𝐺, ∅)‘suc 𝑏)))
12244, 121syl 17 . . . . . . . . 9 (𝑏 ∈ ω → (rec(𝐺, ∅)‘suc suc 𝑏) = (𝐺‘(rec(𝐺, ∅)‘suc 𝑏)))
123122fveq1d 6155 . . . . . . . 8 (𝑏 ∈ ω → ((rec(𝐺, ∅)‘suc suc 𝑏)‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘suc 𝑏))‘𝑐))
124123ad2antrr 761 . . . . . . 7 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((rec(𝐺, ∅)‘suc suc 𝑏)‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘suc 𝑏))‘𝑐))
125117, 120, 1243eqtr4rd 2666 . . . . . 6 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((rec(𝐺, ∅)‘suc suc 𝑏)‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘𝑏))‘𝑐))
126 fvres 6169 . . . . . . 7 (𝑐 ∈ (𝑅1‘suc 𝑏) → (((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏))‘𝑐) = ((rec(𝐺, ∅)‘suc suc 𝑏)‘𝑐))
127126adantl 482 . . . . . 6 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → (((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏))‘𝑐) = ((rec(𝐺, ∅)‘suc suc 𝑏)‘𝑐))
128 rdgsuc 7472 . . . . . . . . 9 (𝑏 ∈ On → (rec(𝐺, ∅)‘suc 𝑏) = (𝐺‘(rec(𝐺, ∅)‘𝑏)))
12950, 128syl 17 . . . . . . . 8 (𝑏 ∈ ω → (rec(𝐺, ∅)‘suc 𝑏) = (𝐺‘(rec(𝐺, ∅)‘𝑏)))
130129fveq1d 6155 . . . . . . 7 (𝑏 ∈ ω → ((rec(𝐺, ∅)‘suc 𝑏)‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘𝑏))‘𝑐))
131130ad2antrr 761 . . . . . 6 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((rec(𝐺, ∅)‘suc 𝑏)‘𝑐) = ((𝐺‘(rec(𝐺, ∅)‘𝑏))‘𝑐))
132125, 127, 1313eqtr4rd 2666 . . . . 5 (((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) ∧ 𝑐 ∈ (𝑅1‘suc 𝑏)) → ((rec(𝐺, ∅)‘suc 𝑏)‘𝑐) = (((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏))‘𝑐))
13338, 49, 132eqfnfvd 6275 . . . 4 ((𝑏 ∈ ω ∧ (rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏))) → (rec(𝐺, ∅)‘suc 𝑏) = ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏)))
134133ex 450 . . 3 (𝑏 ∈ ω → ((rec(𝐺, ∅)‘𝑏) = ((rec(𝐺, ∅)‘suc 𝑏) ↾ (𝑅1𝑏)) → (rec(𝐺, ∅)‘suc 𝑏) = ((rec(𝐺, ∅)‘suc suc 𝑏) ↾ (𝑅1‘suc 𝑏))))
1356, 12, 18, 24, 30, 134finds 7046 . 2 (𝐴 ∈ ω → (rec(𝐺, ∅)‘𝐴) = ((rec(𝐺, ∅)‘suc 𝐴) ↾ (𝑅1𝐴)))
136 resss 5386 . 2 ((rec(𝐺, ∅)‘suc 𝐴) ↾ (𝑅1𝐴)) ⊆ (rec(𝐺, ∅)‘suc 𝐴)
137135, 136syl6eqss 3639 1 (𝐴 ∈ ω → (rec(𝐺, ∅)‘𝐴) ⊆ (rec(𝐺, ∅)‘suc 𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384   = wceq 1480  wcel 1987  Vcvv 3189  cin 3558  wss 3559  c0 3896  𝒫 cpw 4135  {csn 4153   ciun 4490  cmpt 4678  Tr wtr 4717   × cxp 5077  dom cdm 5079  cres 5081  cima 5082  Oncon0 5687  suc csuc 5689   Fn wfn 5847  1-1-ontowf1o 5851  cfv 5852  ωcom 7019  reccrdg 7457  Fincfn 7907  𝑅1cr1 8577  cardccrd 8713
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4736  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6909
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3191  df-sbc 3422  df-csb 3519  df-dif 3562  df-un 3564  df-in 3566  df-ss 3573  df-pss 3575  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-tp 4158  df-op 4160  df-uni 4408  df-int 4446  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-tr 4718  df-eprel 4990  df-id 4994  df-po 5000  df-so 5001  df-fr 5038  df-we 5040  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-pred 5644  df-ord 5690  df-on 5691  df-lim 5692  df-suc 5693  df-iota 5815  df-fun 5854  df-fn 5855  df-f 5856  df-f1 5857  df-fo 5858  df-f1o 5859  df-fv 5860  df-ov 6613  df-oprab 6614  df-mpt2 6615  df-om 7020  df-1st 7120  df-2nd 7121  df-wrecs 7359  df-recs 7420  df-rdg 7458  df-1o 7512  df-2o 7513  df-oadd 7516  df-er 7694  df-map 7811  df-en 7908  df-dom 7909  df-sdom 7910  df-fin 7911  df-r1 8579  df-card 8717  df-cda 8942
This theorem is referenced by:  ackbij2lem4  9016
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