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Theorem tfrcllemaccex 6258
Description: We can define an acceptable function on any element of 𝑋.

As with many of the transfinite recursion theorems, we have hypotheses that state that 𝐹 is a function and that it is defined up to 𝑋. (Contributed by Jim Kingdon, 26-Mar-2022.)

Hypotheses
Ref Expression
tfrcl.f 𝐹 = recs(𝐺)
tfrcl.g (𝜑 → Fun 𝐺)
tfrcl.x (𝜑 → Ord 𝑋)
tfrcl.ex ((𝜑𝑥𝑋𝑓:𝑥𝑆) → (𝐺𝑓) ∈ 𝑆)
tfrcllemsucfn.1 𝐴 = {𝑓 ∣ ∃𝑥𝑋 (𝑓:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑓𝑦) = (𝐺‘(𝑓𝑦)))}
tfrcllemaccex.u ((𝜑𝑥 𝑋) → suc 𝑥𝑋)
Assertion
Ref Expression
tfrcllemaccex ((𝜑𝐶𝑋) → ∃𝑔(𝑔:𝐶𝑆 ∧ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
Distinct variable groups:   𝑢,𝐴,𝑥,𝑦   𝐶,𝑔,𝑢   𝑔,𝐺,𝑢,𝑦,𝑥   𝑓,𝐺,𝑥,𝑦   𝑆,𝑔,𝑢,𝑦,𝑥   𝑆,𝑓   𝑦,𝑋,𝑥,𝑓   𝜑,𝑦,𝑥,𝑓
Allowed substitution hints:   𝜑(𝑢,𝑔)   𝐴(𝑓,𝑔)   𝐶(𝑥,𝑦,𝑓)   𝐹(𝑥,𝑦,𝑢,𝑓,𝑔)   𝑋(𝑢,𝑔)

Proof of Theorem tfrcllemaccex
Dummy variables 𝑎 𝑏 𝑐 𝑟 𝑠 𝑡 𝑑 𝑧 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 tfrcl.x . . 3 (𝜑 → Ord 𝑋)
2 ordelon 4305 . . 3 ((Ord 𝑋𝐶𝑋) → 𝐶 ∈ On)
31, 2sylan 281 . 2 ((𝜑𝐶𝑋) → 𝐶 ∈ On)
4 eleq1 2202 . . . . 5 (𝑧 = 𝑤 → (𝑧𝑋𝑤𝑋))
54anbi2d 459 . . . 4 (𝑧 = 𝑤 → ((𝜑𝑧𝑋) ↔ (𝜑𝑤𝑋)))
6 feq2 5256 . . . . . 6 (𝑧 = 𝑤 → (𝑔:𝑧𝑆𝑔:𝑤𝑆))
7 raleq 2626 . . . . . 6 (𝑧 = 𝑤 → (∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)) ↔ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
86, 7anbi12d 464 . . . . 5 (𝑧 = 𝑤 → ((𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ (𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
98exbidv 1797 . . . 4 (𝑧 = 𝑤 → (∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
105, 9imbi12d 233 . . 3 (𝑧 = 𝑤 → (((𝜑𝑧𝑋) → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ ((𝜑𝑤𝑋) → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
11 eleq1 2202 . . . . 5 (𝑧 = 𝐶 → (𝑧𝑋𝐶𝑋))
1211anbi2d 459 . . . 4 (𝑧 = 𝐶 → ((𝜑𝑧𝑋) ↔ (𝜑𝐶𝑋)))
13 feq2 5256 . . . . . 6 (𝑧 = 𝐶 → (𝑔:𝑧𝑆𝑔:𝐶𝑆))
14 raleq 2626 . . . . . 6 (𝑧 = 𝐶 → (∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)) ↔ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
1513, 14anbi12d 464 . . . . 5 (𝑧 = 𝐶 → ((𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ (𝑔:𝐶𝑆 ∧ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
1615exbidv 1797 . . . 4 (𝑧 = 𝐶 → (∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ ∃𝑔(𝑔:𝐶𝑆 ∧ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
1712, 16imbi12d 233 . . 3 (𝑧 = 𝐶 → (((𝜑𝑧𝑋) → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ ((𝜑𝐶𝑋) → ∃𝑔(𝑔:𝐶𝑆 ∧ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
18 tfrcl.f . . . . . . . . 9 𝐹 = recs(𝐺)
19 tfrcl.g . . . . . . . . . 10 (𝜑 → Fun 𝐺)
2019ad3antrrr 483 . . . . . . . . 9 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) → Fun 𝐺)
211ad3antrrr 483 . . . . . . . . 9 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) → Ord 𝑋)
22 tfrcl.ex . . . . . . . . . . . . . . . . 17 ((𝜑𝑥𝑋𝑓:𝑥𝑆) → (𝐺𝑓) ∈ 𝑆)
23223expia 1183 . . . . . . . . . . . . . . . 16 ((𝜑𝑥𝑋) → (𝑓:𝑥𝑆 → (𝐺𝑓) ∈ 𝑆))
2423alrimiv 1846 . . . . . . . . . . . . . . 15 ((𝜑𝑥𝑋) → ∀𝑓(𝑓:𝑥𝑆 → (𝐺𝑓) ∈ 𝑆))
25 feq1 5255 . . . . . . . . . . . . . . . . 17 (𝑓 = → (𝑓:𝑥𝑆:𝑥𝑆))
26 fveq2 5421 . . . . . . . . . . . . . . . . . 18 (𝑓 = → (𝐺𝑓) = (𝐺))
2726eleq1d 2208 . . . . . . . . . . . . . . . . 17 (𝑓 = → ((𝐺𝑓) ∈ 𝑆 ↔ (𝐺) ∈ 𝑆))
2825, 27imbi12d 233 . . . . . . . . . . . . . . . 16 (𝑓 = → ((𝑓:𝑥𝑆 → (𝐺𝑓) ∈ 𝑆) ↔ (:𝑥𝑆 → (𝐺) ∈ 𝑆)))
2928cbvalv 1889 . . . . . . . . . . . . . . 15 (∀𝑓(𝑓:𝑥𝑆 → (𝐺𝑓) ∈ 𝑆) ↔ ∀(:𝑥𝑆 → (𝐺) ∈ 𝑆))
3024, 29sylib 121 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → ∀(:𝑥𝑆 → (𝐺) ∈ 𝑆))
313019.21bi 1537 . . . . . . . . . . . . 13 ((𝜑𝑥𝑋) → (:𝑥𝑆 → (𝐺) ∈ 𝑆))
32313impia 1178 . . . . . . . . . . . 12 ((𝜑𝑥𝑋:𝑥𝑆) → (𝐺) ∈ 𝑆)
33323adant1r 1209 . . . . . . . . . . 11 (((𝜑𝑧 ∈ On) ∧ 𝑥𝑋:𝑥𝑆) → (𝐺) ∈ 𝑆)
34333adant1r 1209 . . . . . . . . . 10 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑥𝑋:𝑥𝑆) → (𝐺) ∈ 𝑆)
35343adant1r 1209 . . . . . . . . 9 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑥𝑋:𝑥𝑆) → (𝐺) ∈ 𝑆)
36 tfrcllemsucfn.1 . . . . . . . . . 10 𝐴 = {𝑓 ∣ ∃𝑥𝑋 (𝑓:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑓𝑦) = (𝐺‘(𝑓𝑦)))}
37 fveq1 5420 . . . . . . . . . . . . . . 15 (𝑓 = → (𝑓𝑦) = (𝑦))
38 reseq1 4813 . . . . . . . . . . . . . . . 16 (𝑓 = → (𝑓𝑦) = (𝑦))
3938fveq2d 5425 . . . . . . . . . . . . . . 15 (𝑓 = → (𝐺‘(𝑓𝑦)) = (𝐺‘(𝑦)))
4037, 39eqeq12d 2154 . . . . . . . . . . . . . 14 (𝑓 = → ((𝑓𝑦) = (𝐺‘(𝑓𝑦)) ↔ (𝑦) = (𝐺‘(𝑦))))
4140ralbidv 2437 . . . . . . . . . . . . 13 (𝑓 = → (∀𝑦𝑥 (𝑓𝑦) = (𝐺‘(𝑓𝑦)) ↔ ∀𝑦𝑥 (𝑦) = (𝐺‘(𝑦))))
4225, 41anbi12d 464 . . . . . . . . . . . 12 (𝑓 = → ((𝑓:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑓𝑦) = (𝐺‘(𝑓𝑦))) ↔ (:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑦) = (𝐺‘(𝑦)))))
4342rexbidv 2438 . . . . . . . . . . 11 (𝑓 = → (∃𝑥𝑋 (𝑓:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑓𝑦) = (𝐺‘(𝑓𝑦))) ↔ ∃𝑥𝑋 (:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑦) = (𝐺‘(𝑦)))))
4443cbvabv 2264 . . . . . . . . . 10 {𝑓 ∣ ∃𝑥𝑋 (𝑓:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑓𝑦) = (𝐺‘(𝑓𝑦)))} = { ∣ ∃𝑥𝑋 (:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑦) = (𝐺‘(𝑦)))}
4536, 44eqtri 2160 . . . . . . . . 9 𝐴 = { ∣ ∃𝑥𝑋 (:𝑥𝑆 ∧ ∀𝑦𝑥 (𝑦) = (𝐺‘(𝑦)))}
46 feq1 5255 . . . . . . . . . . . . . . 15 (𝑟 = 𝑎 → (𝑟:𝑡𝑆𝑎:𝑡𝑆))
47 eleq1 2202 . . . . . . . . . . . . . . 15 (𝑟 = 𝑎 → (𝑟𝐴𝑎𝐴))
48 id 19 . . . . . . . . . . . . . . . . 17 (𝑟 = 𝑎𝑟 = 𝑎)
49 fveq2 5421 . . . . . . . . . . . . . . . . . . 19 (𝑟 = 𝑎 → (𝐺𝑟) = (𝐺𝑎))
5049opeq2d 3712 . . . . . . . . . . . . . . . . . 18 (𝑟 = 𝑎 → ⟨𝑡, (𝐺𝑟)⟩ = ⟨𝑡, (𝐺𝑎)⟩)
5150sneqd 3540 . . . . . . . . . . . . . . . . 17 (𝑟 = 𝑎 → {⟨𝑡, (𝐺𝑟)⟩} = {⟨𝑡, (𝐺𝑎)⟩})
5248, 51uneq12d 3231 . . . . . . . . . . . . . . . 16 (𝑟 = 𝑎 → (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩}) = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩}))
5352eqeq2d 2151 . . . . . . . . . . . . . . 15 (𝑟 = 𝑎 → (𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩}) ↔ 𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩})))
5446, 47, 533anbi123d 1290 . . . . . . . . . . . . . 14 (𝑟 = 𝑎 → ((𝑟:𝑡𝑆𝑟𝐴𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩})) ↔ (𝑎:𝑡𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩}))))
5554cbvexv 1890 . . . . . . . . . . . . 13 (∃𝑟(𝑟:𝑡𝑆𝑟𝐴𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩})) ↔ ∃𝑎(𝑎:𝑡𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩})))
5655rexbii 2442 . . . . . . . . . . . 12 (∃𝑡𝑧𝑟(𝑟:𝑡𝑆𝑟𝐴𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩})) ↔ ∃𝑡𝑧𝑎(𝑎:𝑡𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩})))
57 feq2 5256 . . . . . . . . . . . . . . 15 (𝑡 = 𝑏 → (𝑎:𝑡𝑆𝑎:𝑏𝑆))
58 opeq1 3705 . . . . . . . . . . . . . . . . . 18 (𝑡 = 𝑏 → ⟨𝑡, (𝐺𝑎)⟩ = ⟨𝑏, (𝐺𝑎)⟩)
5958sneqd 3540 . . . . . . . . . . . . . . . . 17 (𝑡 = 𝑏 → {⟨𝑡, (𝐺𝑎)⟩} = {⟨𝑏, (𝐺𝑎)⟩})
6059uneq2d 3230 . . . . . . . . . . . . . . . 16 (𝑡 = 𝑏 → (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩}) = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))
6160eqeq2d 2151 . . . . . . . . . . . . . . 15 (𝑡 = 𝑏 → (𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩}) ↔ 𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})))
6257, 613anbi13d 1292 . . . . . . . . . . . . . 14 (𝑡 = 𝑏 → ((𝑎:𝑡𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩})) ↔ (𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))))
6362exbidv 1797 . . . . . . . . . . . . 13 (𝑡 = 𝑏 → (∃𝑎(𝑎:𝑡𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩})) ↔ ∃𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))))
6463cbvrexv 2655 . . . . . . . . . . . 12 (∃𝑡𝑧𝑎(𝑎:𝑡𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑡, (𝐺𝑎)⟩})) ↔ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})))
6556, 64bitri 183 . . . . . . . . . . 11 (∃𝑡𝑧𝑟(𝑟:𝑡𝑆𝑟𝐴𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩})) ↔ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})))
6665abbii 2255 . . . . . . . . . 10 {𝑠 ∣ ∃𝑡𝑧𝑟(𝑟:𝑡𝑆𝑟𝐴𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩}))} = {𝑠 ∣ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))}
67 eqeq1 2146 . . . . . . . . . . . . . 14 (𝑠 = 𝑑 → (𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}) ↔ 𝑑 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})))
68673anbi3d 1296 . . . . . . . . . . . . 13 (𝑠 = 𝑑 → ((𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})) ↔ (𝑎:𝑏𝑆𝑎𝐴𝑑 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))))
6968exbidv 1797 . . . . . . . . . . . 12 (𝑠 = 𝑑 → (∃𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})) ↔ ∃𝑎(𝑎:𝑏𝑆𝑎𝐴𝑑 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))))
7069rexbidv 2438 . . . . . . . . . . 11 (𝑠 = 𝑑 → (∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩})) ↔ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑑 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))))
7170cbvabv 2264 . . . . . . . . . 10 {𝑠 ∣ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑠 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))} = {𝑑 ∣ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑑 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))}
7266, 71eqtri 2160 . . . . . . . . 9 {𝑠 ∣ ∃𝑡𝑧𝑟(𝑟:𝑡𝑆𝑟𝐴𝑠 = (𝑟 ∪ {⟨𝑡, (𝐺𝑟)⟩}))} = {𝑑 ∣ ∃𝑏𝑧𝑎(𝑎:𝑏𝑆𝑎𝐴𝑑 = (𝑎 ∪ {⟨𝑏, (𝐺𝑎)⟩}))}
73 tfrcllemaccex.u . . . . . . . . . . . 12 ((𝜑𝑥 𝑋) → suc 𝑥𝑋)
7473adantlr 468 . . . . . . . . . . 11 (((𝜑𝑧 ∈ On) ∧ 𝑥 𝑋) → suc 𝑥𝑋)
7574adantlr 468 . . . . . . . . . 10 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑥 𝑋) → suc 𝑥𝑋)
7675adantlr 468 . . . . . . . . 9 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑥 𝑋) → suc 𝑥𝑋)
77 simpr 109 . . . . . . . . 9 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) → 𝑧𝑋)
78 simpr 109 . . . . . . . . . . . 12 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → 𝑏𝑧)
79 simplr 519 . . . . . . . . . . . 12 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → 𝑧𝑋)
80 ordtr1 4310 . . . . . . . . . . . . . 14 (Ord 𝑋 → ((𝑏𝑧𝑧𝑋) → 𝑏𝑋))
811, 80syl 14 . . . . . . . . . . . . 13 (𝜑 → ((𝑏𝑧𝑧𝑋) → 𝑏𝑋))
8281ad4antr 485 . . . . . . . . . . . 12 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → ((𝑏𝑧𝑧𝑋) → 𝑏𝑋))
8378, 79, 82mp2and 429 . . . . . . . . . . 11 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → 𝑏𝑋)
84 eleq1 2202 . . . . . . . . . . . . . 14 (𝑤 = 𝑏 → (𝑤𝑋𝑏𝑋))
85 feq2 5256 . . . . . . . . . . . . . . . 16 (𝑤 = 𝑏 → (𝑔:𝑤𝑆𝑔:𝑏𝑆))
86 raleq 2626 . . . . . . . . . . . . . . . 16 (𝑤 = 𝑏 → (∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)) ↔ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
8785, 86anbi12d 464 . . . . . . . . . . . . . . 15 (𝑤 = 𝑏 → ((𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ (𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
8887exbidv 1797 . . . . . . . . . . . . . 14 (𝑤 = 𝑏 → (∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ ∃𝑔(𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
8984, 88imbi12d 233 . . . . . . . . . . . . 13 (𝑤 = 𝑏 → ((𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ (𝑏𝑋 → ∃𝑔(𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
90 simpllr 523 . . . . . . . . . . . . 13 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
9189, 90, 78rspcdva 2794 . . . . . . . . . . . 12 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → (𝑏𝑋 → ∃𝑔(𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
92 feq1 5255 . . . . . . . . . . . . . . 15 (𝑔 = 𝑎 → (𝑔:𝑏𝑆𝑎:𝑏𝑆))
93 fveq1 5420 . . . . . . . . . . . . . . . . 17 (𝑔 = 𝑎 → (𝑔𝑢) = (𝑎𝑢))
94 reseq1 4813 . . . . . . . . . . . . . . . . . 18 (𝑔 = 𝑎 → (𝑔𝑢) = (𝑎𝑢))
9594fveq2d 5425 . . . . . . . . . . . . . . . . 17 (𝑔 = 𝑎 → (𝐺‘(𝑔𝑢)) = (𝐺‘(𝑎𝑢)))
9693, 95eqeq12d 2154 . . . . . . . . . . . . . . . 16 (𝑔 = 𝑎 → ((𝑔𝑢) = (𝐺‘(𝑔𝑢)) ↔ (𝑎𝑢) = (𝐺‘(𝑎𝑢))))
9796ralbidv 2437 . . . . . . . . . . . . . . 15 (𝑔 = 𝑎 → (∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢)) ↔ ∀𝑢𝑏 (𝑎𝑢) = (𝐺‘(𝑎𝑢))))
9892, 97anbi12d 464 . . . . . . . . . . . . . 14 (𝑔 = 𝑎 → ((𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ (𝑎:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑎𝑢) = (𝐺‘(𝑎𝑢)))))
9998cbvexv 1890 . . . . . . . . . . . . 13 (∃𝑔(𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ ∃𝑎(𝑎:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑎𝑢) = (𝐺‘(𝑎𝑢))))
100 fveq2 5421 . . . . . . . . . . . . . . . . 17 (𝑢 = 𝑐 → (𝑎𝑢) = (𝑎𝑐))
101 reseq2 4814 . . . . . . . . . . . . . . . . . 18 (𝑢 = 𝑐 → (𝑎𝑢) = (𝑎𝑐))
102101fveq2d 5425 . . . . . . . . . . . . . . . . 17 (𝑢 = 𝑐 → (𝐺‘(𝑎𝑢)) = (𝐺‘(𝑎𝑐)))
103100, 102eqeq12d 2154 . . . . . . . . . . . . . . . 16 (𝑢 = 𝑐 → ((𝑎𝑢) = (𝐺‘(𝑎𝑢)) ↔ (𝑎𝑐) = (𝐺‘(𝑎𝑐))))
104103cbvralv 2654 . . . . . . . . . . . . . . 15 (∀𝑢𝑏 (𝑎𝑢) = (𝐺‘(𝑎𝑢)) ↔ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐)))
105104anbi2i 452 . . . . . . . . . . . . . 14 ((𝑎:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑎𝑢) = (𝐺‘(𝑎𝑢))) ↔ (𝑎:𝑏𝑆 ∧ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐))))
106105exbii 1584 . . . . . . . . . . . . 13 (∃𝑎(𝑎:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑎𝑢) = (𝐺‘(𝑎𝑢))) ↔ ∃𝑎(𝑎:𝑏𝑆 ∧ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐))))
10799, 106bitri 183 . . . . . . . . . . . 12 (∃𝑔(𝑔:𝑏𝑆 ∧ ∀𝑢𝑏 (𝑔𝑢) = (𝐺‘(𝑔𝑢))) ↔ ∃𝑎(𝑎:𝑏𝑆 ∧ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐))))
10891, 107syl6ib 160 . . . . . . . . . . 11 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → (𝑏𝑋 → ∃𝑎(𝑎:𝑏𝑆 ∧ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐)))))
10983, 108mpd 13 . . . . . . . . . 10 (((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) ∧ 𝑏𝑧) → ∃𝑎(𝑎:𝑏𝑆 ∧ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐))))
110109ralrimiva 2505 . . . . . . . . 9 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) → ∀𝑏𝑧𝑎(𝑎:𝑏𝑆 ∧ ∀𝑐𝑏 (𝑎𝑐) = (𝐺‘(𝑎𝑐))))
11118, 20, 21, 35, 45, 72, 76, 77, 110tfrcllemex 6257 . . . . . . . 8 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) → ∃(:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑢) = (𝐺‘(𝑢))))
112 feq1 5255 . . . . . . . . . 10 ( = 𝑔 → (:𝑧𝑆𝑔:𝑧𝑆))
113 fveq1 5420 . . . . . . . . . . . 12 ( = 𝑔 → (𝑢) = (𝑔𝑢))
114 reseq1 4813 . . . . . . . . . . . . 13 ( = 𝑔 → (𝑢) = (𝑔𝑢))
115114fveq2d 5425 . . . . . . . . . . . 12 ( = 𝑔 → (𝐺‘(𝑢)) = (𝐺‘(𝑔𝑢)))
116113, 115eqeq12d 2154 . . . . . . . . . . 11 ( = 𝑔 → ((𝑢) = (𝐺‘(𝑢)) ↔ (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
117116ralbidv 2437 . . . . . . . . . 10 ( = 𝑔 → (∀𝑢𝑧 (𝑢) = (𝐺‘(𝑢)) ↔ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
118112, 117anbi12d 464 . . . . . . . . 9 ( = 𝑔 → ((:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑢) = (𝐺‘(𝑢))) ↔ (𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
119118cbvexv 1890 . . . . . . . 8 (∃(:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑢) = (𝐺‘(𝑢))) ↔ ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
120111, 119sylib 121 . . . . . . 7 ((((𝜑𝑧 ∈ On) ∧ ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ∧ 𝑧𝑋) → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
121120exp31 361 . . . . . 6 ((𝜑𝑧 ∈ On) → (∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) → (𝑧𝑋 → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
122121expcom 115 . . . . 5 (𝑧 ∈ On → (𝜑 → (∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) → (𝑧𝑋 → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))))
123122a2d 26 . . . 4 (𝑧 ∈ On → ((𝜑 → ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) → (𝜑 → (𝑧𝑋 → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))))
124 impexp 261 . . . . . 6 (((𝜑𝑤𝑋) → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ (𝜑 → (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
125124ralbii 2441 . . . . 5 (∀𝑤𝑧 ((𝜑𝑤𝑋) → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ ∀𝑤𝑧 (𝜑 → (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
126 r19.21v 2509 . . . . 5 (∀𝑤𝑧 (𝜑 → (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))) ↔ (𝜑 → ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
127125, 126bitri 183 . . . 4 (∀𝑤𝑧 ((𝜑𝑤𝑋) → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ (𝜑 → ∀𝑤𝑧 (𝑤𝑋 → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
128 impexp 261 . . . 4 (((𝜑𝑧𝑋) → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) ↔ (𝜑 → (𝑧𝑋 → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
129123, 127, 1283imtr4g 204 . . 3 (𝑧 ∈ On → (∀𝑤𝑧 ((𝜑𝑤𝑋) → ∃𝑔(𝑔:𝑤𝑆 ∧ ∀𝑢𝑤 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))) → ((𝜑𝑧𝑋) → ∃𝑔(𝑔:𝑧𝑆 ∧ ∀𝑢𝑧 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))))
13010, 17, 129tfis3 4500 . 2 (𝐶 ∈ On → ((𝜑𝐶𝑋) → ∃𝑔(𝑔:𝐶𝑆 ∧ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢)))))
1313, 130mpcom 36 1 ((𝜑𝐶𝑋) → ∃𝑔(𝑔:𝐶𝑆 ∧ ∀𝑢𝐶 (𝑔𝑢) = (𝐺‘(𝑔𝑢))))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 103  w3a 962  wal 1329   = wceq 1331  wex 1468  wcel 1480  {cab 2125  wral 2416  wrex 2417  cun 3069  {csn 3527  cop 3530   cuni 3736  Ord word 4284  Oncon0 4285  suc csuc 4287  cres 4541  Fun wfun 5117  wf 5119  cfv 5123  recscrecs 6201
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 603  ax-in2 604  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121  ax-coll 4043  ax-sep 4046  ax-pow 4098  ax-pr 4131  ax-un 4355  ax-setind 4452
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-fal 1337  df-nf 1437  df-sb 1736  df-eu 2002  df-mo 2003  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-ne 2309  df-ral 2421  df-rex 2422  df-reu 2423  df-rab 2425  df-v 2688  df-sbc 2910  df-csb 3004  df-dif 3073  df-un 3075  df-in 3077  df-ss 3084  df-nul 3364  df-pw 3512  df-sn 3533  df-pr 3534  df-op 3536  df-uni 3737  df-iun 3815  df-br 3930  df-opab 3990  df-mpt 3991  df-tr 4027  df-id 4215  df-iord 4288  df-on 4290  df-suc 4293  df-xp 4545  df-rel 4546  df-cnv 4547  df-co 4548  df-dm 4549  df-rn 4550  df-res 4551  df-ima 4552  df-iota 5088  df-fun 5125  df-fn 5126  df-f 5127  df-f1 5128  df-fo 5129  df-f1o 5130  df-fv 5131  df-recs 6202
This theorem is referenced by:  tfrcllemres  6259
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