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Theorem oemapvali 9139
 Description: If 𝐹 < 𝐺, then there is some 𝑧 witnessing this, but we can say more and in fact there is a definable expression 𝑋 that also witnesses 𝐹 < 𝐺. (Contributed by Mario Carneiro, 25-May-2015.)
Hypotheses
Ref Expression
cantnfs.s 𝑆 = dom (𝐴 CNF 𝐵)
cantnfs.a (𝜑𝐴 ∈ On)
cantnfs.b (𝜑𝐵 ∈ On)
oemapval.t 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐵 ((𝑥𝑧) ∈ (𝑦𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝑥𝑤) = (𝑦𝑤)))}
oemapval.f (𝜑𝐹𝑆)
oemapval.g (𝜑𝐺𝑆)
oemapvali.r (𝜑𝐹𝑇𝐺)
oemapvali.x 𝑋 = {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)}
Assertion
Ref Expression
oemapvali (𝜑 → (𝑋𝐵 ∧ (𝐹𝑋) ∈ (𝐺𝑋) ∧ ∀𝑤𝐵 (𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤))))
Distinct variable groups:   𝑤,𝑐,𝑥,𝑦,𝑧,𝐵   𝐴,𝑐,𝑤,𝑥,𝑦,𝑧   𝑇,𝑐   𝑤,𝐹,𝑥,𝑦,𝑧   𝑆,𝑐,𝑥,𝑦,𝑧   𝐺,𝑐,𝑤,𝑥,𝑦,𝑧   𝜑,𝑥,𝑦,𝑧   𝑤,𝑋,𝑥,𝑦,𝑧   𝐹,𝑐   𝜑,𝑐
Allowed substitution hints:   𝜑(𝑤)   𝑆(𝑤)   𝑇(𝑥,𝑦,𝑧,𝑤)   𝑋(𝑐)

Proof of Theorem oemapvali
StepHypRef Expression
1 oemapvali.r . . 3 (𝜑𝐹𝑇𝐺)
2 cantnfs.s . . . 4 𝑆 = dom (𝐴 CNF 𝐵)
3 cantnfs.a . . . 4 (𝜑𝐴 ∈ On)
4 cantnfs.b . . . 4 (𝜑𝐵 ∈ On)
5 oemapval.t . . . 4 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐵 ((𝑥𝑧) ∈ (𝑦𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝑥𝑤) = (𝑦𝑤)))}
6 oemapval.f . . . 4 (𝜑𝐹𝑆)
7 oemapval.g . . . 4 (𝜑𝐺𝑆)
82, 3, 4, 5, 6, 7oemapval 9138 . . 3 (𝜑 → (𝐹𝑇𝐺 ↔ ∃𝑧𝐵 ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤)))))
91, 8mpbid 234 . 2 (𝜑 → ∃𝑧𝐵 ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))
10 ssrab2 4054 . . . 4 {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ 𝐵
11 oemapvali.x . . . . 5 𝑋 = {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)}
124adantr 483 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝐵 ∈ On)
13 onss 7497 . . . . . . . 8 (𝐵 ∈ On → 𝐵 ⊆ On)
1412, 13syl 17 . . . . . . 7 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝐵 ⊆ On)
1510, 14sstrid 3976 . . . . . 6 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ On)
162, 3, 4cantnfs 9121 . . . . . . . . . 10 (𝜑 → (𝐺𝑆 ↔ (𝐺:𝐵𝐴𝐺 finSupp ∅)))
177, 16mpbid 234 . . . . . . . . 9 (𝜑 → (𝐺:𝐵𝐴𝐺 finSupp ∅))
1817simprd 498 . . . . . . . 8 (𝜑𝐺 finSupp ∅)
1918adantr 483 . . . . . . 7 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝐺 finSupp ∅)
2043ad2ant1 1127 . . . . . . . . . 10 ((𝜑𝑐𝐵 ∧ (𝐹𝑐) ∈ (𝐺𝑐)) → 𝐵 ∈ On)
21 simp2 1131 . . . . . . . . . 10 ((𝜑𝑐𝐵 ∧ (𝐹𝑐) ∈ (𝐺𝑐)) → 𝑐𝐵)
2217simpld 497 . . . . . . . . . . . 12 (𝜑𝐺:𝐵𝐴)
2322ffnd 6508 . . . . . . . . . . 11 (𝜑𝐺 Fn 𝐵)
24233ad2ant1 1127 . . . . . . . . . 10 ((𝜑𝑐𝐵 ∧ (𝐹𝑐) ∈ (𝐺𝑐)) → 𝐺 Fn 𝐵)
25 ne0i 4298 . . . . . . . . . . 11 ((𝐹𝑐) ∈ (𝐺𝑐) → (𝐺𝑐) ≠ ∅)
26253ad2ant3 1129 . . . . . . . . . 10 ((𝜑𝑐𝐵 ∧ (𝐹𝑐) ∈ (𝐺𝑐)) → (𝐺𝑐) ≠ ∅)
27 fvn0elsupp 7838 . . . . . . . . . 10 (((𝐵 ∈ On ∧ 𝑐𝐵) ∧ (𝐺 Fn 𝐵 ∧ (𝐺𝑐) ≠ ∅)) → 𝑐 ∈ (𝐺 supp ∅))
2820, 21, 24, 26, 27syl22anc 836 . . . . . . . . 9 ((𝜑𝑐𝐵 ∧ (𝐹𝑐) ∈ (𝐺𝑐)) → 𝑐 ∈ (𝐺 supp ∅))
2928rabssdv 4049 . . . . . . . 8 (𝜑 → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ (𝐺 supp ∅))
3029adantr 483 . . . . . . 7 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ (𝐺 supp ∅))
31 fsuppimp 8831 . . . . . . . 8 (𝐺 finSupp ∅ → (Fun 𝐺 ∧ (𝐺 supp ∅) ∈ Fin))
32 ssfi 8730 . . . . . . . . 9 (((𝐺 supp ∅) ∈ Fin ∧ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ (𝐺 supp ∅)) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ Fin)
3332ex 415 . . . . . . . 8 ((𝐺 supp ∅) ∈ Fin → ({𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ (𝐺 supp ∅) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ Fin))
3431, 33simpl2im 506 . . . . . . 7 (𝐺 finSupp ∅ → ({𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ (𝐺 supp ∅) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ Fin))
3519, 30, 34sylc 65 . . . . . 6 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ Fin)
36 fveq2 6663 . . . . . . . . 9 (𝑐 = 𝑧 → (𝐹𝑐) = (𝐹𝑧))
37 fveq2 6663 . . . . . . . . 9 (𝑐 = 𝑧 → (𝐺𝑐) = (𝐺𝑧))
3836, 37eleq12d 2905 . . . . . . . 8 (𝑐 = 𝑧 → ((𝐹𝑐) ∈ (𝐺𝑐) ↔ (𝐹𝑧) ∈ (𝐺𝑧)))
39 simprl 769 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑧𝐵)
40 simprrl 779 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝐹𝑧) ∈ (𝐺𝑧))
4138, 39, 40elrabd 3680 . . . . . . 7 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑧 ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)})
4241ne0d 4299 . . . . . 6 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ≠ ∅)
43 ordunifi 8760 . . . . . 6 (({𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ On ∧ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ Fin ∧ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ≠ ∅) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)})
4415, 35, 42, 43syl3anc 1365 . . . . 5 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)})
4511, 44eqeltrid 2915 . . . 4 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑋 ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)})
4610, 45sseldi 3963 . . 3 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑋𝐵)
47 fveq2 6663 . . . . . . 7 (𝑥 = 𝑋 → (𝐹𝑥) = (𝐹𝑋))
48 fveq2 6663 . . . . . . 7 (𝑥 = 𝑋 → (𝐺𝑥) = (𝐺𝑋))
4947, 48eleq12d 2905 . . . . . 6 (𝑥 = 𝑋 → ((𝐹𝑥) ∈ (𝐺𝑥) ↔ (𝐹𝑋) ∈ (𝐺𝑋)))
50 fveq2 6663 . . . . . . . 8 (𝑐 = 𝑥 → (𝐹𝑐) = (𝐹𝑥))
51 fveq2 6663 . . . . . . . 8 (𝑐 = 𝑥 → (𝐺𝑐) = (𝐺𝑥))
5250, 51eleq12d 2905 . . . . . . 7 (𝑐 = 𝑥 → ((𝐹𝑐) ∈ (𝐺𝑐) ↔ (𝐹𝑥) ∈ (𝐺𝑥)))
5352cbvrabv 3490 . . . . . 6 {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} = {𝑥𝐵 ∣ (𝐹𝑥) ∈ (𝐺𝑥)}
5449, 53elrab2 3681 . . . . 5 (𝑋 ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ↔ (𝑋𝐵 ∧ (𝐹𝑋) ∈ (𝐺𝑋)))
5545, 54sylib 220 . . . 4 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝑋𝐵 ∧ (𝐹𝑋) ∈ (𝐺𝑋)))
5655simprd 498 . . 3 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝐹𝑋) ∈ (𝐺𝑋))
57 simprrr 780 . . . 4 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤)))
583adantr 483 . . . . . . . . . . 11 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝐴 ∈ On)
5922adantr 483 . . . . . . . . . . . 12 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝐺:𝐵𝐴)
6059, 46ffvelrnd 6845 . . . . . . . . . . 11 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝐺𝑋) ∈ 𝐴)
61 onelon 6209 . . . . . . . . . . 11 ((𝐴 ∈ On ∧ (𝐺𝑋) ∈ 𝐴) → (𝐺𝑋) ∈ On)
6258, 60, 61syl2anc 586 . . . . . . . . . 10 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝐺𝑋) ∈ On)
63 eloni 6194 . . . . . . . . . 10 ((𝐺𝑋) ∈ On → Ord (𝐺𝑋))
64 ordirr 6202 . . . . . . . . . 10 (Ord (𝐺𝑋) → ¬ (𝐺𝑋) ∈ (𝐺𝑋))
6562, 63, 643syl 18 . . . . . . . . 9 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → ¬ (𝐺𝑋) ∈ (𝐺𝑋))
66 nelneq 2935 . . . . . . . . 9 (((𝐹𝑋) ∈ (𝐺𝑋) ∧ ¬ (𝐺𝑋) ∈ (𝐺𝑋)) → ¬ (𝐹𝑋) = (𝐺𝑋))
6756, 65, 66syl2anc 586 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → ¬ (𝐹𝑋) = (𝐺𝑋))
68 eleq2 2899 . . . . . . . . . 10 (𝑤 = 𝑋 → (𝑧𝑤𝑧𝑋))
69 fveq2 6663 . . . . . . . . . . 11 (𝑤 = 𝑋 → (𝐹𝑤) = (𝐹𝑋))
70 fveq2 6663 . . . . . . . . . . 11 (𝑤 = 𝑋 → (𝐺𝑤) = (𝐺𝑋))
7169, 70eqeq12d 2835 . . . . . . . . . 10 (𝑤 = 𝑋 → ((𝐹𝑤) = (𝐺𝑤) ↔ (𝐹𝑋) = (𝐺𝑋)))
7268, 71imbi12d 347 . . . . . . . . 9 (𝑤 = 𝑋 → ((𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤)) ↔ (𝑧𝑋 → (𝐹𝑋) = (𝐺𝑋))))
7372, 57, 46rspcdva 3623 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝑧𝑋 → (𝐹𝑋) = (𝐺𝑋)))
7467, 73mtod 200 . . . . . . 7 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → ¬ 𝑧𝑋)
75 ssexg 5218 . . . . . . . . . . 11 (({𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ 𝐵𝐵 ∈ On) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ V)
7610, 12, 75sylancr 589 . . . . . . . . . 10 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ V)
77 ssonuni 7493 . . . . . . . . . 10 ({𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ V → ({𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ⊆ On → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ On))
7876, 15, 77sylc 65 . . . . . . . . 9 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} ∈ On)
7911, 78eqeltrid 2915 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑋 ∈ On)
80 onelon 6209 . . . . . . . . 9 ((𝐵 ∈ On ∧ 𝑧𝐵) → 𝑧 ∈ On)
8112, 39, 80syl2anc 586 . . . . . . . 8 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑧 ∈ On)
82 ontri1 6218 . . . . . . . 8 ((𝑋 ∈ On ∧ 𝑧 ∈ On) → (𝑋𝑧 ↔ ¬ 𝑧𝑋))
8379, 81, 82syl2anc 586 . . . . . . 7 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝑋𝑧 ↔ ¬ 𝑧𝑋))
8474, 83mpbird 259 . . . . . 6 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑋𝑧)
85 elssuni 4859 . . . . . . . 8 (𝑧 ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} → 𝑧 {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)})
8685, 11sseqtrrdi 4016 . . . . . . 7 (𝑧 ∈ {𝑐𝐵 ∣ (𝐹𝑐) ∈ (𝐺𝑐)} → 𝑧𝑋)
8741, 86syl 17 . . . . . 6 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑧𝑋)
8884, 87eqssd 3982 . . . . 5 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → 𝑋 = 𝑧)
89 eleq1 2898 . . . . . . 7 (𝑋 = 𝑧 → (𝑋𝑤𝑧𝑤))
9089imbi1d 344 . . . . . 6 (𝑋 = 𝑧 → ((𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤)) ↔ (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))
9190ralbidv 3195 . . . . 5 (𝑋 = 𝑧 → (∀𝑤𝐵 (𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤)) ↔ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))
9288, 91syl 17 . . . 4 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (∀𝑤𝐵 (𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤)) ↔ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))
9357, 92mpbird 259 . . 3 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → ∀𝑤𝐵 (𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤)))
9446, 56, 933jca 1122 . 2 ((𝜑 ∧ (𝑧𝐵 ∧ ((𝐹𝑧) ∈ (𝐺𝑧) ∧ ∀𝑤𝐵 (𝑧𝑤 → (𝐹𝑤) = (𝐺𝑤))))) → (𝑋𝐵 ∧ (𝐹𝑋) ∈ (𝐺𝑋) ∧ ∀𝑤𝐵 (𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤))))
959, 94rexlimddv 3289 1 (𝜑 → (𝑋𝐵 ∧ (𝐹𝑋) ∈ (𝐺𝑋) ∧ ∀𝑤𝐵 (𝑋𝑤 → (𝐹𝑤) = (𝐺𝑤))))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1081   = wceq 1530   ∈ wcel 2107   ≠ wne 3014  ∀wral 3136  ∃wrex 3137  {crab 3140  Vcvv 3493   ⊆ wss 3934  ∅c0 4289  ∪ cuni 4830   class class class wbr 5057  {copab 5119  dom cdm 5548  Ord word 6183  Oncon0 6184  Fun wfun 6342   Fn wfn 6343  ⟶wf 6344  ‘cfv 6348  (class class class)co 7148   supp csupp 7822  Fincfn 8501   finSupp cfsupp 8825   CNF ccnf 9116 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2791  ax-rep 5181  ax-sep 5194  ax-nul 5201  ax-pow 5257  ax-pr 5320  ax-un 7453 This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-fal 1543  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2616  df-eu 2648  df-clab 2798  df-cleq 2812  df-clel 2891  df-nfc 2961  df-ne 3015  df-ral 3141  df-rex 3142  df-reu 3143  df-rab 3145  df-v 3495  df-sbc 3771  df-csb 3882  df-dif 3937  df-un 3939  df-in 3941  df-ss 3950  df-pss 3952  df-nul 4290  df-if 4466  df-pw 4539  df-sn 4560  df-pr 4562  df-tp 4564  df-op 4566  df-uni 4831  df-iun 4912  df-br 5058  df-opab 5120  df-mpt 5138  df-tr 5164  df-id 5453  df-eprel 5458  df-po 5467  df-so 5468  df-fr 5507  df-we 5509  df-xp 5554  df-rel 5555  df-cnv 5556  df-co 5557  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-pred 6141  df-ord 6187  df-on 6188  df-lim 6189  df-suc 6190  df-iota 6307  df-fun 6350  df-fn 6351  df-f 6352  df-f1 6353  df-fo 6354  df-f1o 6355  df-fv 6356  df-ov 7151  df-oprab 7152  df-mpo 7153  df-om 7573  df-supp 7823  df-wrecs 7939  df-recs 8000  df-rdg 8038  df-seqom 8076  df-1o 8094  df-er 8281  df-map 8400  df-en 8502  df-fin 8505  df-fsupp 8826  df-cnf 9117 This theorem is referenced by:  cantnflem1a  9140  cantnflem1b  9141  cantnflem1c  9142  cantnflem1d  9143  cantnflem1  9144
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