Step | Hyp | Ref
| Expression |
1 | | isumshft.5 |
. . . . . . . . 9
⊢ (𝜑 → 𝑀 ∈ ℤ) |
2 | | isumshft.4 |
. . . . . . . . 9
⊢ (𝜑 → 𝐾 ∈ ℤ) |
3 | 1, 2 | zaddcld 12359 |
. . . . . . . 8
⊢ (𝜑 → (𝑀 + 𝐾) ∈ ℤ) |
4 | | isumshft.2 |
. . . . . . . . . 10
⊢ 𝑊 =
(ℤ≥‘(𝑀 + 𝐾)) |
5 | 4 | eleq2i 2830 |
. . . . . . . . 9
⊢ (𝑚 ∈ 𝑊 ↔ 𝑚 ∈ (ℤ≥‘(𝑀 + 𝐾))) |
6 | 2 | zcnd 12356 |
. . . . . . . . . . 11
⊢ (𝜑 → 𝐾 ∈ ℂ) |
7 | | eluzelcn 12523 |
. . . . . . . . . . . 12
⊢ (𝑚 ∈
(ℤ≥‘(𝑀 + 𝐾)) → 𝑚 ∈ ℂ) |
8 | 7, 4 | eleq2s 2857 |
. . . . . . . . . . 11
⊢ (𝑚 ∈ 𝑊 → 𝑚 ∈ ℂ) |
9 | | isumshft.1 |
. . . . . . . . . . . . . 14
⊢ 𝑍 =
(ℤ≥‘𝑀) |
10 | 9 | fvexi 6770 |
. . . . . . . . . . . . 13
⊢ 𝑍 ∈ V |
11 | 10 | mptex 7081 |
. . . . . . . . . . . 12
⊢ (𝑘 ∈ 𝑍 ↦ 𝐵) ∈ V |
12 | 11 | shftval 14713 |
. . . . . . . . . . 11
⊢ ((𝐾 ∈ ℂ ∧ 𝑚 ∈ ℂ) → (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾))) |
13 | 6, 8, 12 | syl2an 595 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾))) |
14 | | simpr 484 |
. . . . . . . . . . . . . . . 16
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ 𝑍) |
15 | | eqid 2738 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑘 ∈ 𝑍 ↦ 𝐵) = (𝑘 ∈ 𝑍 ↦ 𝐵) |
16 | 15 | fvmpt2i 6867 |
. . . . . . . . . . . . . . . 16
⊢ (𝑘 ∈ 𝑍 → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ( I ‘𝐵)) |
17 | 14, 16 | syl 17 |
. . . . . . . . . . . . . . 15
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ( I ‘𝐵)) |
18 | | eluzelcn 12523 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑘 ∈
(ℤ≥‘𝑀) → 𝑘 ∈ ℂ) |
19 | 18, 9 | eleq2s 2857 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℂ) |
20 | | addcom 11091 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝐾 ∈ ℂ ∧ 𝑘 ∈ ℂ) → (𝐾 + 𝑘) = (𝑘 + 𝐾)) |
21 | 6, 19, 20 | syl2an 595 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) = (𝑘 + 𝐾)) |
22 | | id 22 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ 𝑍) |
23 | 22, 9 | eleqtrdi 2849 |
. . . . . . . . . . . . . . . . . . 19
⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ (ℤ≥‘𝑀)) |
24 | | eluzadd 12542 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((𝑘 ∈
(ℤ≥‘𝑀) ∧ 𝐾 ∈ ℤ) → (𝑘 + 𝐾) ∈
(ℤ≥‘(𝑀 + 𝐾))) |
25 | 23, 2, 24 | syl2anr 596 |
. . . . . . . . . . . . . . . . . 18
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝑘 + 𝐾) ∈
(ℤ≥‘(𝑀 + 𝐾))) |
26 | 21, 25 | eqeltrd 2839 |
. . . . . . . . . . . . . . . . 17
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ (ℤ≥‘(𝑀 + 𝐾))) |
27 | 26, 4 | eleqtrrdi 2850 |
. . . . . . . . . . . . . . . 16
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐾 + 𝑘) ∈ 𝑊) |
28 | | isumshft.3 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑗 = (𝐾 + 𝑘) → 𝐴 = 𝐵) |
29 | | eqid 2738 |
. . . . . . . . . . . . . . . . 17
⊢ (𝑗 ∈ 𝑊 ↦ 𝐴) = (𝑗 ∈ 𝑊 ↦ 𝐴) |
30 | 28, 29 | fvmpti 6856 |
. . . . . . . . . . . . . . . 16
⊢ ((𝐾 + 𝑘) ∈ 𝑊 → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) = ( I ‘𝐵)) |
31 | 27, 30 | syl 17 |
. . . . . . . . . . . . . . 15
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) = ( I ‘𝐵)) |
32 | 17, 31 | eqtr4d 2781 |
. . . . . . . . . . . . . 14
⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘))) |
33 | 32 | ralrimiva 3107 |
. . . . . . . . . . . . 13
⊢ (𝜑 → ∀𝑘 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘))) |
34 | | nffvmpt1 6767 |
. . . . . . . . . . . . . . 15
⊢
Ⅎ𝑘((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) |
35 | 34 | nfeq1 2921 |
. . . . . . . . . . . . . 14
⊢
Ⅎ𝑘((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) |
36 | | fveq2 6756 |
. . . . . . . . . . . . . . 15
⊢ (𝑘 = 𝑛 → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛)) |
37 | | oveq2 7263 |
. . . . . . . . . . . . . . . 16
⊢ (𝑘 = 𝑛 → (𝐾 + 𝑘) = (𝐾 + 𝑛)) |
38 | 37 | fveq2d 6760 |
. . . . . . . . . . . . . . 15
⊢ (𝑘 = 𝑛 → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛))) |
39 | 36, 38 | eqeq12d 2754 |
. . . . . . . . . . . . . 14
⊢ (𝑘 = 𝑛 → (((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) ↔ ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)))) |
40 | 35, 39 | rspc 3539 |
. . . . . . . . . . . . 13
⊢ (𝑛 ∈ 𝑍 → (∀𝑘 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑘) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑘)) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)))) |
41 | 33, 40 | mpan9 506 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛))) |
42 | 41 | ralrimiva 3107 |
. . . . . . . . . . 11
⊢ (𝜑 → ∀𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛))) |
43 | 1 | adantr 480 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝑀 ∈ ℤ) |
44 | 2 | adantr 480 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝐾 ∈ ℤ) |
45 | | simpr 484 |
. . . . . . . . . . . . . 14
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝑚 ∈ 𝑊) |
46 | 45, 4 | eleqtrdi 2849 |
. . . . . . . . . . . . 13
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → 𝑚 ∈ (ℤ≥‘(𝑀 + 𝐾))) |
47 | | eluzsub 12543 |
. . . . . . . . . . . . 13
⊢ ((𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑚 ∈
(ℤ≥‘(𝑀 + 𝐾))) → (𝑚 − 𝐾) ∈ (ℤ≥‘𝑀)) |
48 | 43, 44, 46, 47 | syl3anc 1369 |
. . . . . . . . . . . 12
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (𝑚 − 𝐾) ∈ (ℤ≥‘𝑀)) |
49 | 48, 9 | eleqtrrdi 2850 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (𝑚 − 𝐾) ∈ 𝑍) |
50 | | fveq2 6756 |
. . . . . . . . . . . . 13
⊢ (𝑛 = (𝑚 − 𝐾) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾))) |
51 | | oveq2 7263 |
. . . . . . . . . . . . . 14
⊢ (𝑛 = (𝑚 − 𝐾) → (𝐾 + 𝑛) = (𝐾 + (𝑚 − 𝐾))) |
52 | 51 | fveq2d 6760 |
. . . . . . . . . . . . 13
⊢ (𝑛 = (𝑚 − 𝐾) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾)))) |
53 | 50, 52 | eqeq12d 2754 |
. . . . . . . . . . . 12
⊢ (𝑛 = (𝑚 − 𝐾) → (((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ↔ ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾))))) |
54 | 53 | rspccva 3551 |
. . . . . . . . . . 11
⊢
((∀𝑛 ∈
𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ∧ (𝑚 − 𝐾) ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾)))) |
55 | 42, 49, 54 | syl2an2r 681 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘(𝑚 − 𝐾)) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾)))) |
56 | | pncan3 11159 |
. . . . . . . . . . . 12
⊢ ((𝐾 ∈ ℂ ∧ 𝑚 ∈ ℂ) → (𝐾 + (𝑚 − 𝐾)) = 𝑚) |
57 | 6, 8, 56 | syl2an 595 |
. . . . . . . . . . 11
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → (𝐾 + (𝑚 − 𝐾)) = 𝑚) |
58 | 57 | fveq2d 6760 |
. . . . . . . . . 10
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + (𝑚 − 𝐾))) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚)) |
59 | 13, 55, 58 | 3eqtrrd 2783 |
. . . . . . . . 9
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚)) |
60 | 5, 59 | sylan2br 594 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑚 ∈ (ℤ≥‘(𝑀 + 𝐾))) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = (((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)‘𝑚)) |
61 | 3, 60 | seqfeq 13676 |
. . . . . . 7
⊢ (𝜑 → seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) = seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾))) |
62 | 61 | breq1d 5080 |
. . . . . 6
⊢ (𝜑 → (seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥 ↔ seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)) ⇝ 𝑥)) |
63 | 11 | isershft 15303 |
. . . . . . 7
⊢ ((𝑀 ∈ ℤ ∧ 𝐾 ∈ ℤ) →
(seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥 ↔ seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)) ⇝ 𝑥)) |
64 | 1, 2, 63 | syl2anc 583 |
. . . . . 6
⊢ (𝜑 → (seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥 ↔ seq(𝑀 + 𝐾)( + , ((𝑘 ∈ 𝑍 ↦ 𝐵) shift 𝐾)) ⇝ 𝑥)) |
65 | 62, 64 | bitr4d 281 |
. . . . 5
⊢ (𝜑 → (seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥 ↔ seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥)) |
66 | 65 | iotabidv 6402 |
. . . 4
⊢ (𝜑 → (℩𝑥seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥) = (℩𝑥seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥)) |
67 | | df-fv 6426 |
. . . 4
⊢ ( ⇝
‘seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴))) = (℩𝑥seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)) ⇝ 𝑥) |
68 | | df-fv 6426 |
. . . 4
⊢ ( ⇝
‘seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵))) = (℩𝑥seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)) ⇝ 𝑥) |
69 | 66, 67, 68 | 3eqtr4g 2804 |
. . 3
⊢ (𝜑 → ( ⇝ ‘seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴))) = ( ⇝ ‘seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)))) |
70 | | eqidd 2739 |
. . . 4
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚)) |
71 | | isumshft.6 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑗 ∈ 𝑊) → 𝐴 ∈ ℂ) |
72 | 71 | fmpttd 6971 |
. . . . 5
⊢ (𝜑 → (𝑗 ∈ 𝑊 ↦ 𝐴):𝑊⟶ℂ) |
73 | 72 | ffvelrnda 6943 |
. . . 4
⊢ ((𝜑 ∧ 𝑚 ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) ∈ ℂ) |
74 | 4, 3, 70, 73 | isum 15359 |
. . 3
⊢ (𝜑 → Σ𝑚 ∈ 𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = ( ⇝ ‘seq(𝑀 + 𝐾)( + , (𝑗 ∈ 𝑊 ↦ 𝐴)))) |
75 | | eqidd 2739 |
. . . 4
⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛)) |
76 | 27 | ralrimiva 3107 |
. . . . . . 7
⊢ (𝜑 → ∀𝑘 ∈ 𝑍 (𝐾 + 𝑘) ∈ 𝑊) |
77 | 37 | eleq1d 2823 |
. . . . . . . 8
⊢ (𝑘 = 𝑛 → ((𝐾 + 𝑘) ∈ 𝑊 ↔ (𝐾 + 𝑛) ∈ 𝑊)) |
78 | 77 | rspccva 3551 |
. . . . . . 7
⊢
((∀𝑘 ∈
𝑍 (𝐾 + 𝑘) ∈ 𝑊 ∧ 𝑛 ∈ 𝑍) → (𝐾 + 𝑛) ∈ 𝑊) |
79 | 76, 78 | sylan 579 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐾 + 𝑛) ∈ 𝑊) |
80 | | ffvelrn 6941 |
. . . . . 6
⊢ (((𝑗 ∈ 𝑊 ↦ 𝐴):𝑊⟶ℂ ∧ (𝐾 + 𝑛) ∈ 𝑊) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ∈ ℂ) |
81 | 72, 79, 80 | syl2an2r 681 |
. . . . 5
⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑗 ∈ 𝑊 ↦ 𝐴)‘(𝐾 + 𝑛)) ∈ ℂ) |
82 | 41, 81 | eqeltrd 2839 |
. . . 4
⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) ∈ ℂ) |
83 | 9, 1, 75, 82 | isum 15359 |
. . 3
⊢ (𝜑 → Σ𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = ( ⇝ ‘seq𝑀( + , (𝑘 ∈ 𝑍 ↦ 𝐵)))) |
84 | 69, 74, 83 | 3eqtr4d 2788 |
. 2
⊢ (𝜑 → Σ𝑚 ∈ 𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = Σ𝑛 ∈ 𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛)) |
85 | | sumfc 15349 |
. 2
⊢
Σ𝑚 ∈
𝑊 ((𝑗 ∈ 𝑊 ↦ 𝐴)‘𝑚) = Σ𝑗 ∈ 𝑊 𝐴 |
86 | | sumfc 15349 |
. 2
⊢
Σ𝑛 ∈
𝑍 ((𝑘 ∈ 𝑍 ↦ 𝐵)‘𝑛) = Σ𝑘 ∈ 𝑍 𝐵 |
87 | 84, 85, 86 | 3eqtr3g 2802 |
1
⊢ (𝜑 → Σ𝑗 ∈ 𝑊 𝐴 = Σ𝑘 ∈ 𝑍 𝐵) |