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Theorem dgrlem 24805
 Description: Lemma for dgrcl 24809 and similar theorems. (Contributed by Mario Carneiro, 22-Jul-2014.)
Hypothesis
Ref Expression
dgrval.1 𝐴 = (coeff‘𝐹)
Assertion
Ref Expression
dgrlem (𝐹 ∈ (Poly‘𝑆) → (𝐴:ℕ0⟶(𝑆 ∪ {0}) ∧ ∃𝑛 ∈ ℤ ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
Distinct variable groups:   𝑥,𝑛,𝐴   𝑛,𝐹,𝑥   𝑆,𝑛,𝑥

Proof of Theorem dgrlem
Dummy variables 𝑎 𝑘 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elply2 24772 . . . 4 (𝐹 ∈ (Poly‘𝑆) ↔ (𝑆 ⊆ ℂ ∧ ∃𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0)((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))))
21simprbi 499 . . 3 (𝐹 ∈ (Poly‘𝑆) → ∃𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0)((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))))
3 simplrr 776 . . . . . . 7 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))
4 simpll 765 . . . . . . . . . . 11 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝐹 ∈ (Poly‘𝑆))
5 plybss 24770 . . . . . . . . . . 11 (𝐹 ∈ (Poly‘𝑆) → 𝑆 ⊆ ℂ)
64, 5syl 17 . . . . . . . . . 10 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑆 ⊆ ℂ)
7 0cnd 10612 . . . . . . . . . . 11 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 0 ∈ ℂ)
87snssd 4718 . . . . . . . . . 10 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → {0} ⊆ ℂ)
96, 8unssd 4141 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑆 ∪ {0}) ⊆ ℂ)
10 cnex 10596 . . . . . . . . 9 ℂ ∈ V
11 ssexg 5203 . . . . . . . . 9 (((𝑆 ∪ {0}) ⊆ ℂ ∧ ℂ ∈ V) → (𝑆 ∪ {0}) ∈ V)
129, 10, 11sylancl 588 . . . . . . . 8 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑆 ∪ {0}) ∈ V)
13 nn0ex 11882 . . . . . . . 8 0 ∈ V
14 elmapg 8397 . . . . . . . 8 (((𝑆 ∪ {0}) ∈ V ∧ ℕ0 ∈ V) → (𝑎 ∈ ((𝑆 ∪ {0}) ↑m0) ↔ 𝑎:ℕ0⟶(𝑆 ∪ {0})))
1512, 13, 14sylancl 588 . . . . . . 7 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑎 ∈ ((𝑆 ∪ {0}) ↑m0) ↔ 𝑎:ℕ0⟶(𝑆 ∪ {0})))
163, 15mpbid 234 . . . . . 6 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑎:ℕ0⟶(𝑆 ∪ {0}))
17 dgrval.1 . . . . . . . 8 𝐴 = (coeff‘𝐹)
18 simplrl 775 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑛 ∈ ℕ0)
1916, 9fssd 6504 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑎:ℕ0⟶ℂ)
20 simprl 769 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑎 “ (ℤ‘(𝑛 + 1))) = {0})
21 simprr 771 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))
224, 18, 19, 20, 21coeeq 24803 . . . . . . . 8 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (coeff‘𝐹) = 𝑎)
2317, 22syl5req 2868 . . . . . . 7 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑎 = 𝐴)
2423feq1d 6475 . . . . . 6 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑎:ℕ0⟶(𝑆 ∪ {0}) ↔ 𝐴:ℕ0⟶(𝑆 ∪ {0})))
2516, 24mpbid 234 . . . . 5 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝐴:ℕ0⟶(𝑆 ∪ {0}))
2625ex 415 . . . 4 ((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) → (((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))) → 𝐴:ℕ0⟶(𝑆 ∪ {0})))
2726rexlimdvva 3281 . . 3 (𝐹 ∈ (Poly‘𝑆) → (∃𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0)((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))) → 𝐴:ℕ0⟶(𝑆 ∪ {0})))
282, 27mpd 15 . 2 (𝐹 ∈ (Poly‘𝑆) → 𝐴:ℕ0⟶(𝑆 ∪ {0}))
29 nn0ssz 11982 . . 3 0 ⊆ ℤ
30 ffn 6490 . . . . . . . . . . . . . 14 (𝑎:ℕ0⟶ℂ → 𝑎 Fn ℕ0)
31 elpreima 6804 . . . . . . . . . . . . . 14 (𝑎 Fn ℕ0 → (𝑥 ∈ (𝑎 “ (ℂ ∖ {0})) ↔ (𝑥 ∈ ℕ0 ∧ (𝑎𝑥) ∈ (ℂ ∖ {0}))))
3219, 30, 313syl 18 . . . . . . . . . . . . 13 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑥 ∈ (𝑎 “ (ℂ ∖ {0})) ↔ (𝑥 ∈ ℕ0 ∧ (𝑎𝑥) ∈ (ℂ ∖ {0}))))
3332biimpa 479 . . . . . . . . . . . 12 ((((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) ∧ 𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))) → (𝑥 ∈ ℕ0 ∧ (𝑎𝑥) ∈ (ℂ ∖ {0})))
34 eldifsni 4698 . . . . . . . . . . . 12 ((𝑎𝑥) ∈ (ℂ ∖ {0}) → (𝑎𝑥) ≠ 0)
3533, 34simpl2im 506 . . . . . . . . . . 11 ((((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) ∧ 𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))) → (𝑎𝑥) ≠ 0)
3633simpld 497 . . . . . . . . . . . 12 ((((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) ∧ 𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))) → 𝑥 ∈ ℕ0)
37 plyco0 24768 . . . . . . . . . . . . . . 15 ((𝑛 ∈ ℕ0𝑎:ℕ0⟶ℂ) → ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ↔ ∀𝑥 ∈ ℕ0 ((𝑎𝑥) ≠ 0 → 𝑥𝑛)))
3818, 19, 37syl2anc 586 . . . . . . . . . . . . . 14 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ↔ ∀𝑥 ∈ ℕ0 ((𝑎𝑥) ≠ 0 → 𝑥𝑛)))
3920, 38mpbid 234 . . . . . . . . . . . . 13 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → ∀𝑥 ∈ ℕ0 ((𝑎𝑥) ≠ 0 → 𝑥𝑛))
4039r19.21bi 3195 . . . . . . . . . . . 12 ((((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) ∧ 𝑥 ∈ ℕ0) → ((𝑎𝑥) ≠ 0 → 𝑥𝑛))
4136, 40syldan 593 . . . . . . . . . . 11 ((((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) ∧ 𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))) → ((𝑎𝑥) ≠ 0 → 𝑥𝑛))
4235, 41mpd 15 . . . . . . . . . 10 ((((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) ∧ 𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))) → 𝑥𝑛)
4342ralrimiva 3169 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → ∀𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))𝑥𝑛)
4423cnveqd 5722 . . . . . . . . . . 11 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → 𝑎 = 𝐴)
4544imaeq1d 5904 . . . . . . . . . 10 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (𝑎 “ (ℂ ∖ {0})) = (𝐴 “ (ℂ ∖ {0})))
4645raleqdv 3398 . . . . . . . . 9 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → (∀𝑥 ∈ (𝑎 “ (ℂ ∖ {0}))𝑥𝑛 ↔ ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
4743, 46mpbid 234 . . . . . . . 8 (((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) ∧ ((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘))))) → ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛)
4847ex 415 . . . . . . 7 ((𝐹 ∈ (Poly‘𝑆) ∧ (𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0))) → (((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))) → ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
4948expr 459 . . . . . 6 ((𝐹 ∈ (Poly‘𝑆) ∧ 𝑛 ∈ ℕ0) → (𝑎 ∈ ((𝑆 ∪ {0}) ↑m0) → (((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))) → ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛)))
5049rexlimdv 3270 . . . . 5 ((𝐹 ∈ (Poly‘𝑆) ∧ 𝑛 ∈ ℕ0) → (∃𝑎 ∈ ((𝑆 ∪ {0}) ↑m0)((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))) → ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
5150reximdva 3261 . . . 4 (𝐹 ∈ (Poly‘𝑆) → (∃𝑛 ∈ ℕ0𝑎 ∈ ((𝑆 ∪ {0}) ↑m0)((𝑎 “ (ℤ‘(𝑛 + 1))) = {0} ∧ 𝐹 = (𝑧 ∈ ℂ ↦ Σ𝑘 ∈ (0...𝑛)((𝑎𝑘) · (𝑧𝑘)))) → ∃𝑛 ∈ ℕ0𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
522, 51mpd 15 . . 3 (𝐹 ∈ (Poly‘𝑆) → ∃𝑛 ∈ ℕ0𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛)
53 ssrexv 4013 . . 3 (ℕ0 ⊆ ℤ → (∃𝑛 ∈ ℕ0𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛 → ∃𝑛 ∈ ℤ ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
5429, 52, 53mpsyl 68 . 2 (𝐹 ∈ (Poly‘𝑆) → ∃𝑛 ∈ ℤ ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛)
5528, 54jca 514 1 (𝐹 ∈ (Poly‘𝑆) → (𝐴:ℕ0⟶(𝑆 ∪ {0}) ∧ ∃𝑛 ∈ ℤ ∀𝑥 ∈ (𝐴 “ (ℂ ∖ {0}))𝑥𝑛))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   = wceq 1537   ∈ wcel 2114   ≠ wne 3006  ∀wral 3125  ∃wrex 3126  Vcvv 3473   ∖ cdif 3910   ∪ cun 3911   ⊆ wss 3913  {csn 4543   class class class wbr 5042   ↦ cmpt 5122  ◡ccnv 5530   “ cima 5534   Fn wfn 6326  ⟶wf 6327  ‘cfv 6331  (class class class)co 7133   ↑m cmap 8384  ℂcc 10513  0cc0 10515  1c1 10516   + caddc 10518   · cmul 10520   ≤ cle 10654  ℕ0cn0 11876  ℤcz 11960  ℤ≥cuz 12222  ...cfz 12876  ↑cexp 13414  Σcsu 15022  Polycply 24760  coeffccoe 24762 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2792  ax-rep 5166  ax-sep 5179  ax-nul 5186  ax-pow 5242  ax-pr 5306  ax-un 7439  ax-inf2 9082  ax-cnex 10571  ax-resscn 10572  ax-1cn 10573  ax-icn 10574  ax-addcl 10575  ax-addrcl 10576  ax-mulcl 10577  ax-mulrcl 10578  ax-mulcom 10579  ax-addass 10580  ax-mulass 10581  ax-distr 10582  ax-i2m1 10583  ax-1ne0 10584  ax-1rid 10585  ax-rnegex 10586  ax-rrecex 10587  ax-cnre 10588  ax-pre-lttri 10589  ax-pre-lttrn 10590  ax-pre-ltadd 10591  ax-pre-mulgt0 10592  ax-pre-sup 10593  ax-addf 10594 This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-fal 1550  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2891  df-nfc 2959  df-ne 3007  df-nel 3111  df-ral 3130  df-rex 3131  df-reu 3132  df-rmo 3133  df-rab 3134  df-v 3475  df-sbc 3753  df-csb 3861  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-pss 3932  df-nul 4270  df-if 4444  df-pw 4517  df-sn 4544  df-pr 4546  df-tp 4548  df-op 4550  df-uni 4815  df-int 4853  df-iun 4897  df-br 5043  df-opab 5105  df-mpt 5123  df-tr 5149  df-id 5436  df-eprel 5441  df-po 5450  df-so 5451  df-fr 5490  df-se 5491  df-we 5492  df-xp 5537  df-rel 5538  df-cnv 5539  df-co 5540  df-dm 5541  df-rn 5542  df-res 5543  df-ima 5544  df-pred 6124  df-ord 6170  df-on 6171  df-lim 6172  df-suc 6173  df-iota 6290  df-fun 6333  df-fn 6334  df-f 6335  df-f1 6336  df-fo 6337  df-f1o 6338  df-fv 6339  df-isom 6340  df-riota 7091  df-ov 7136  df-oprab 7137  df-mpo 7138  df-of 7387  df-om 7559  df-1st 7667  df-2nd 7668  df-wrecs 7925  df-recs 7986  df-rdg 8024  df-1o 8080  df-oadd 8084  df-er 8267  df-map 8386  df-pm 8387  df-en 8488  df-dom 8489  df-sdom 8490  df-fin 8491  df-sup 8884  df-inf 8885  df-oi 8952  df-card 9346  df-pnf 10655  df-mnf 10656  df-xr 10657  df-ltxr 10658  df-le 10659  df-sub 10850  df-neg 10851  df-div 11276  df-nn 11617  df-2 11679  df-3 11680  df-n0 11877  df-z 11961  df-uz 12223  df-rp 12369  df-fz 12877  df-fzo 13018  df-fl 13146  df-seq 13354  df-exp 13415  df-hash 13676  df-cj 14438  df-re 14439  df-im 14440  df-sqrt 14574  df-abs 14575  df-clim 14825  df-rlim 14826  df-sum 15023  df-0p 24253  df-ply 24764  df-coe 24766 This theorem is referenced by:  coef  24806  dgrcl  24809  dgrub  24810  dgrlb  24812
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