Step | Hyp | Ref
| Expression |
1 | | eluzel2 9444 |
. . . . . . 7
⊢ (𝐾 ∈
(ℤ≥‘𝑁) → 𝑁 ∈ ℤ) |
2 | 1 | adantl 275 |
. . . . . 6
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → 𝑁 ∈ ℤ) |
3 | 2 | zred 9286 |
. . . . 5
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → 𝑁 ∈ ℝ) |
4 | 3 | ltp1d 8801 |
. . . 4
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → 𝑁 < (𝑁 + 1)) |
5 | | fzdisj 9954 |
. . . 4
⊢ (𝑁 < (𝑁 + 1) → ((𝑀...𝑁) ∩ ((𝑁 + 1)...𝐾)) = ∅) |
6 | 4, 5 | syl 14 |
. . 3
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ((𝑀...𝑁) ∩ ((𝑁 + 1)...𝐾)) = ∅) |
7 | | fprodeq0.2 |
. . . . . . . 8
⊢ (𝜑 → 𝑁 ∈ 𝑍) |
8 | | eluzel2 9444 |
. . . . . . . . 9
⊢ (𝑁 ∈
(ℤ≥‘𝑀) → 𝑀 ∈ ℤ) |
9 | | fprodeq0.1 |
. . . . . . . . 9
⊢ 𝑍 =
(ℤ≥‘𝑀) |
10 | 8, 9 | eleq2s 2252 |
. . . . . . . 8
⊢ (𝑁 ∈ 𝑍 → 𝑀 ∈ ℤ) |
11 | 7, 10 | syl 14 |
. . . . . . 7
⊢ (𝜑 → 𝑀 ∈ ℤ) |
12 | 11 | adantr 274 |
. . . . . 6
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → 𝑀 ∈ ℤ) |
13 | | eluzelz 9448 |
. . . . . . 7
⊢ (𝐾 ∈
(ℤ≥‘𝑁) → 𝐾 ∈ ℤ) |
14 | 13 | adantl 275 |
. . . . . 6
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → 𝐾 ∈ ℤ) |
15 | 12, 14, 2 | 3jca 1162 |
. . . . 5
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ∈ ℤ)) |
16 | | eluzle 9451 |
. . . . . . . 8
⊢ (𝑁 ∈
(ℤ≥‘𝑀) → 𝑀 ≤ 𝑁) |
17 | 16, 9 | eleq2s 2252 |
. . . . . . 7
⊢ (𝑁 ∈ 𝑍 → 𝑀 ≤ 𝑁) |
18 | 7, 17 | syl 14 |
. . . . . 6
⊢ (𝜑 → 𝑀 ≤ 𝑁) |
19 | | eluzle 9451 |
. . . . . 6
⊢ (𝐾 ∈
(ℤ≥‘𝑁) → 𝑁 ≤ 𝐾) |
20 | 18, 19 | anim12i 336 |
. . . . 5
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (𝑀 ≤ 𝑁 ∧ 𝑁 ≤ 𝐾)) |
21 | | elfz2 9919 |
. . . . 5
⊢ (𝑁 ∈ (𝑀...𝐾) ↔ ((𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ∈ ℤ) ∧ (𝑀 ≤ 𝑁 ∧ 𝑁 ≤ 𝐾))) |
22 | 15, 20, 21 | sylanbrc 414 |
. . . 4
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → 𝑁 ∈ (𝑀...𝐾)) |
23 | | fzsplit 9953 |
. . . 4
⊢ (𝑁 ∈ (𝑀...𝐾) → (𝑀...𝐾) = ((𝑀...𝑁) ∪ ((𝑁 + 1)...𝐾))) |
24 | 22, 23 | syl 14 |
. . 3
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (𝑀...𝐾) = ((𝑀...𝑁) ∪ ((𝑁 + 1)...𝐾))) |
25 | 12, 14 | fzfigd 10330 |
. . 3
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (𝑀...𝐾) ∈ Fin) |
26 | | elfzelz 9928 |
. . . . . 6
⊢ (𝑗 ∈ (𝑀...𝐾) → 𝑗 ∈ ℤ) |
27 | 26 | adantl 275 |
. . . . 5
⊢ (((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) ∧ 𝑗 ∈ (𝑀...𝐾)) → 𝑗 ∈ ℤ) |
28 | 12 | adantr 274 |
. . . . 5
⊢ (((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) ∧ 𝑗 ∈ (𝑀...𝐾)) → 𝑀 ∈ ℤ) |
29 | 2 | adantr 274 |
. . . . 5
⊢ (((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) ∧ 𝑗 ∈ (𝑀...𝐾)) → 𝑁 ∈ ℤ) |
30 | | fzdcel 9942 |
. . . . 5
⊢ ((𝑗 ∈ ℤ ∧ 𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) →
DECID 𝑗
∈ (𝑀...𝑁)) |
31 | 27, 28, 29, 30 | syl3anc 1220 |
. . . 4
⊢ (((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) ∧ 𝑗 ∈ (𝑀...𝐾)) → DECID 𝑗 ∈ (𝑀...𝑁)) |
32 | 31 | ralrimiva 2530 |
. . 3
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ∀𝑗 ∈ (𝑀...𝐾)DECID 𝑗 ∈ (𝑀...𝑁)) |
33 | | elfzuz 9924 |
. . . . . 6
⊢ (𝑘 ∈ (𝑀...𝐾) → 𝑘 ∈ (ℤ≥‘𝑀)) |
34 | 33, 9 | eleqtrrdi 2251 |
. . . . 5
⊢ (𝑘 ∈ (𝑀...𝐾) → 𝑘 ∈ 𝑍) |
35 | | fprodeq0.3 |
. . . . 5
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐴 ∈ ℂ) |
36 | 34, 35 | sylan2 284 |
. . . 4
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝐾)) → 𝐴 ∈ ℂ) |
37 | 36 | adantlr 469 |
. . 3
⊢ (((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ (𝑀...𝐾)) → 𝐴 ∈ ℂ) |
38 | 6, 24, 25, 32, 37 | fprodsplitdc 11493 |
. 2
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ∏𝑘 ∈ (𝑀...𝐾)𝐴 = (∏𝑘 ∈ (𝑀...𝑁)𝐴 · ∏𝑘 ∈ ((𝑁 + 1)...𝐾)𝐴)) |
39 | 7, 9 | eleqtrdi 2250 |
. . . . . 6
⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) |
40 | | elfzuz 9924 |
. . . . . . . 8
⊢ (𝑘 ∈ (𝑀...𝑁) → 𝑘 ∈ (ℤ≥‘𝑀)) |
41 | 40, 9 | eleqtrrdi 2251 |
. . . . . . 7
⊢ (𝑘 ∈ (𝑀...𝑁) → 𝑘 ∈ 𝑍) |
42 | 41, 35 | sylan2 284 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → 𝐴 ∈ ℂ) |
43 | 39, 42 | fprodm1s 11498 |
. . . . 5
⊢ (𝜑 → ∏𝑘 ∈ (𝑀...𝑁)𝐴 = (∏𝑘 ∈ (𝑀...(𝑁 − 1))𝐴 · ⦋𝑁 / 𝑘⦌𝐴)) |
44 | | fprodeq0.4 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑘 = 𝑁) → 𝐴 = 0) |
45 | 7, 44 | csbied 3077 |
. . . . . 6
⊢ (𝜑 → ⦋𝑁 / 𝑘⦌𝐴 = 0) |
46 | 45 | oveq2d 5840 |
. . . . 5
⊢ (𝜑 → (∏𝑘 ∈ (𝑀...(𝑁 − 1))𝐴 · ⦋𝑁 / 𝑘⦌𝐴) = (∏𝑘 ∈ (𝑀...(𝑁 − 1))𝐴 · 0)) |
47 | | eluzelz 9448 |
. . . . . . . . . 10
⊢ (𝑁 ∈
(ℤ≥‘𝑀) → 𝑁 ∈ ℤ) |
48 | 39, 47 | syl 14 |
. . . . . . . . 9
⊢ (𝜑 → 𝑁 ∈ ℤ) |
49 | | peano2zm 9205 |
. . . . . . . . 9
⊢ (𝑁 ∈ ℤ → (𝑁 − 1) ∈
ℤ) |
50 | 48, 49 | syl 14 |
. . . . . . . 8
⊢ (𝜑 → (𝑁 − 1) ∈ ℤ) |
51 | 11, 50 | fzfigd 10330 |
. . . . . . 7
⊢ (𝜑 → (𝑀...(𝑁 − 1)) ∈ Fin) |
52 | | elfzuz 9924 |
. . . . . . . . 9
⊢ (𝑘 ∈ (𝑀...(𝑁 − 1)) → 𝑘 ∈ (ℤ≥‘𝑀)) |
53 | 52, 9 | eleqtrrdi 2251 |
. . . . . . . 8
⊢ (𝑘 ∈ (𝑀...(𝑁 − 1)) → 𝑘 ∈ 𝑍) |
54 | 53, 35 | sylan2 284 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...(𝑁 − 1))) → 𝐴 ∈ ℂ) |
55 | 51, 54 | fprodcl 11504 |
. . . . . 6
⊢ (𝜑 → ∏𝑘 ∈ (𝑀...(𝑁 − 1))𝐴 ∈ ℂ) |
56 | 55 | mul01d 8268 |
. . . . 5
⊢ (𝜑 → (∏𝑘 ∈ (𝑀...(𝑁 − 1))𝐴 · 0) = 0) |
57 | 43, 46, 56 | 3eqtrd 2194 |
. . . 4
⊢ (𝜑 → ∏𝑘 ∈ (𝑀...𝑁)𝐴 = 0) |
58 | 57 | adantr 274 |
. . 3
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ∏𝑘 ∈ (𝑀...𝑁)𝐴 = 0) |
59 | 58 | oveq1d 5839 |
. 2
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (∏𝑘 ∈ (𝑀...𝑁)𝐴 · ∏𝑘 ∈ ((𝑁 + 1)...𝐾)𝐴) = (0 · ∏𝑘 ∈ ((𝑁 + 1)...𝐾)𝐴)) |
60 | 2 | peano2zd 9289 |
. . . . 5
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (𝑁 + 1) ∈ ℤ) |
61 | 60, 14 | fzfigd 10330 |
. . . 4
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ((𝑁 + 1)...𝐾) ∈ Fin) |
62 | 9 | peano2uzs 9495 |
. . . . . . . . 9
⊢ (𝑁 ∈ 𝑍 → (𝑁 + 1) ∈ 𝑍) |
63 | 7, 62 | syl 14 |
. . . . . . . 8
⊢ (𝜑 → (𝑁 + 1) ∈ 𝑍) |
64 | | elfzuz 9924 |
. . . . . . . 8
⊢ (𝑘 ∈ ((𝑁 + 1)...𝐾) → 𝑘 ∈ (ℤ≥‘(𝑁 + 1))) |
65 | 9 | uztrn2 9456 |
. . . . . . . 8
⊢ (((𝑁 + 1) ∈ 𝑍 ∧ 𝑘 ∈ (ℤ≥‘(𝑁 + 1))) → 𝑘 ∈ 𝑍) |
66 | 63, 64, 65 | syl2an 287 |
. . . . . . 7
⊢ ((𝜑 ∧ 𝑘 ∈ ((𝑁 + 1)...𝐾)) → 𝑘 ∈ 𝑍) |
67 | 66 | adantrl 470 |
. . . . . 6
⊢ ((𝜑 ∧ (𝐾 ∈ (ℤ≥‘𝑁) ∧ 𝑘 ∈ ((𝑁 + 1)...𝐾))) → 𝑘 ∈ 𝑍) |
68 | 67, 35 | syldan 280 |
. . . . 5
⊢ ((𝜑 ∧ (𝐾 ∈ (ℤ≥‘𝑁) ∧ 𝑘 ∈ ((𝑁 + 1)...𝐾))) → 𝐴 ∈ ℂ) |
69 | 68 | anassrs 398 |
. . . 4
⊢ (((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) ∧ 𝑘 ∈ ((𝑁 + 1)...𝐾)) → 𝐴 ∈ ℂ) |
70 | 61, 69 | fprodcl 11504 |
. . 3
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ∏𝑘 ∈ ((𝑁 + 1)...𝐾)𝐴 ∈ ℂ) |
71 | 70 | mul02d 8267 |
. 2
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → (0 ·
∏𝑘 ∈ ((𝑁 + 1)...𝐾)𝐴) = 0) |
72 | 38, 59, 71 | 3eqtrd 2194 |
1
⊢ ((𝜑 ∧ 𝐾 ∈ (ℤ≥‘𝑁)) → ∏𝑘 ∈ (𝑀...𝐾)𝐴 = 0) |