Step | Hyp | Ref
| Expression |
1 | | fourierdlem99.p |
. 2
⊢ 𝑃 = (𝑚 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m
(0...𝑚)) ∣ (((𝑝‘0) = 𝐴 ∧ (𝑝‘𝑚) = 𝐵) ∧ ∀𝑖 ∈ (0..^𝑚)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))}) |
2 | | fourierdlem99.t |
. 2
⊢ 𝑇 = (𝐵 − 𝐴) |
3 | | fourierdlem99.m |
. 2
⊢ (𝜑 → 𝑀 ∈ ℕ) |
4 | | fourierdlem99.q |
. 2
⊢ (𝜑 → 𝑄 ∈ (𝑃‘𝑀)) |
5 | | fourierdlem99.f |
. . 3
⊢ (𝜑 → 𝐹:ℝ⟶ℝ) |
6 | | ax-resscn 10617 |
. . . 4
⊢ ℝ
⊆ ℂ |
7 | 6 | a1i 11 |
. . 3
⊢ (𝜑 → ℝ ⊆
ℂ) |
8 | 5, 7 | fssd 6506 |
. 2
⊢ (𝜑 → 𝐹:ℝ⟶ℂ) |
9 | | fourierdlem99.fper |
. 2
⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (𝐹‘(𝑥 + 𝑇)) = (𝐹‘𝑥)) |
10 | | fourierdlem99.qcn |
. 2
⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → (𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) ∈ (((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))–cn→ℂ)) |
11 | | fourierdlem99.l |
. 2
⊢ ((𝜑 ∧ 𝑖 ∈ (0..^𝑀)) → 𝐿 ∈ ((𝐹 ↾ ((𝑄‘𝑖)(,)(𝑄‘(𝑖 + 1)))) limℂ (𝑄‘(𝑖 + 1)))) |
12 | | fourierdlem99.c |
. 2
⊢ (𝜑 → 𝐶 ∈ ℝ) |
13 | | fourierdlem99.d |
. 2
⊢ (𝜑 → 𝐷 ∈ (𝐶(,)+∞)) |
14 | | eqid 2759 |
. 2
⊢ (𝑚 ∈ ℕ ↦ {𝑝 ∈ (ℝ
↑m (0...𝑚))
∣ (((𝑝‘0) =
𝐶 ∧ (𝑝‘𝑚) = 𝐷) ∧ ∀𝑖 ∈ (0..^𝑚)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))}) = (𝑚 ∈ ℕ ↦ {𝑝 ∈ (ℝ ↑m
(0...𝑚)) ∣ (((𝑝‘0) = 𝐶 ∧ (𝑝‘𝑚) = 𝐷) ∧ ∀𝑖 ∈ (0..^𝑚)(𝑝‘𝑖) < (𝑝‘(𝑖 + 1)))}) |
15 | | oveq1 7150 |
. . . . . . 7
⊢ (𝑧 = 𝑦 → (𝑧 + (𝑙 · 𝑇)) = (𝑦 + (𝑙 · 𝑇))) |
16 | 15 | eleq1d 2835 |
. . . . . 6
⊢ (𝑧 = 𝑦 → ((𝑧 + (𝑙 · 𝑇)) ∈ ran 𝑄 ↔ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄)) |
17 | 16 | rexbidv 3219 |
. . . . 5
⊢ (𝑧 = 𝑦 → (∃𝑙 ∈ ℤ (𝑧 + (𝑙 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄)) |
18 | 17 | cbvrabv 3402 |
. . . 4
⊢ {𝑧 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑧 + (𝑙 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄} |
19 | 18 | uneq2i 4061 |
. . 3
⊢ ({𝐶, 𝐷} ∪ {𝑧 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑧 + (𝑙 · 𝑇)) ∈ ran 𝑄}) = ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}) |
20 | 19 | eqcomi 2768 |
. 2
⊢ ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}) = ({𝐶, 𝐷} ∪ {𝑧 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑧 + (𝑙 · 𝑇)) ∈ ran 𝑄}) |
21 | | oveq1 7150 |
. . . . . . . . . 10
⊢ (𝑘 = 𝑙 → (𝑘 · 𝑇) = (𝑙 · 𝑇)) |
22 | 21 | oveq2d 7159 |
. . . . . . . . 9
⊢ (𝑘 = 𝑙 → (𝑦 + (𝑘 · 𝑇)) = (𝑦 + (𝑙 · 𝑇))) |
23 | 22 | eleq1d 2835 |
. . . . . . . 8
⊢ (𝑘 = 𝑙 → ((𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄)) |
24 | 23 | cbvrexvw 3360 |
. . . . . . 7
⊢
(∃𝑘 ∈
ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄) |
25 | 24 | a1i 11 |
. . . . . 6
⊢ (𝑦 ∈ (𝐶[,]𝐷) → (∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄 ↔ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄)) |
26 | 25 | rabbiia 3382 |
. . . . 5
⊢ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄} |
27 | 26 | uneq2i 4061 |
. . . 4
⊢ ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄}) = ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}) |
28 | 27 | fveq2i 6654 |
. . 3
⊢
(♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) = (♯‘({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄})) |
29 | 28 | oveq1i 7153 |
. 2
⊢
((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1) = ((♯‘({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄})) − 1) |
30 | | oveq1 7150 |
. . . . . . . . . . 11
⊢ (𝑙 = ℎ → (𝑙 · 𝑇) = (ℎ · 𝑇)) |
31 | 30 | oveq2d 7159 |
. . . . . . . . . 10
⊢ (𝑙 = ℎ → (𝑦 + (𝑙 · 𝑇)) = (𝑦 + (ℎ · 𝑇))) |
32 | 31 | eleq1d 2835 |
. . . . . . . . 9
⊢ (𝑙 = ℎ → ((𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄 ↔ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄)) |
33 | 32 | cbvrexvw 3360 |
. . . . . . . 8
⊢
(∃𝑙 ∈
ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄 ↔ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄) |
34 | 33 | a1i 11 |
. . . . . . 7
⊢ (𝑦 ∈ (𝐶[,]𝐷) → (∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄 ↔ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄)) |
35 | 34 | rabbiia 3382 |
. . . . . 6
⊢ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄} = {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄} |
36 | 35 | uneq2i 4061 |
. . . . 5
⊢ ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}) = ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}) |
37 | | isoeq5 7061 |
. . . . 5
⊢ (({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}) = ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}) → (𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄})))) |
38 | 36, 37 | ax-mp 5 |
. . . 4
⊢ (𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}))) |
39 | 38 | iotabii 6313 |
. . 3
⊢
(℩𝑔𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}))) = (℩𝑔𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}))) |
40 | | isoeq1 7057 |
. . . 4
⊢ (𝑓 = 𝑔 → (𝑓 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄})) ↔ 𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄})))) |
41 | 40 | cbviotavw 6295 |
. . 3
⊢
(℩𝑓𝑓 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}))) = (℩𝑔𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}))) |
42 | | fourierdlem99.v |
. . 3
⊢ 𝑉 = (℩𝑔𝑔 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃ℎ ∈ ℤ (𝑦 + (ℎ · 𝑇)) ∈ ran 𝑄}))) |
43 | 39, 41, 42 | 3eqtr4ri 2793 |
. 2
⊢ 𝑉 = (℩𝑓𝑓 Isom < , <
((0...((♯‘({𝐶,
𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1)), ({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑙 ∈ ℤ (𝑦 + (𝑙 · 𝑇)) ∈ ran 𝑄}))) |
44 | | id 22 |
. . . 4
⊢ (𝑣 = 𝑥 → 𝑣 = 𝑥) |
45 | | oveq2 7151 |
. . . . . . 7
⊢ (𝑣 = 𝑥 → (𝐵 − 𝑣) = (𝐵 − 𝑥)) |
46 | 45 | oveq1d 7158 |
. . . . . 6
⊢ (𝑣 = 𝑥 → ((𝐵 − 𝑣) / 𝑇) = ((𝐵 − 𝑥) / 𝑇)) |
47 | 46 | fveq2d 6655 |
. . . . 5
⊢ (𝑣 = 𝑥 → (⌊‘((𝐵 − 𝑣) / 𝑇)) = (⌊‘((𝐵 − 𝑥) / 𝑇))) |
48 | 47 | oveq1d 7158 |
. . . 4
⊢ (𝑣 = 𝑥 → ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇) = ((⌊‘((𝐵 − 𝑥) / 𝑇)) · 𝑇)) |
49 | 44, 48 | oveq12d 7161 |
. . 3
⊢ (𝑣 = 𝑥 → (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)) = (𝑥 + ((⌊‘((𝐵 − 𝑥) / 𝑇)) · 𝑇))) |
50 | 49 | cbvmptv 5128 |
. 2
⊢ (𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇))) = (𝑥 ∈ ℝ ↦ (𝑥 + ((⌊‘((𝐵 − 𝑥) / 𝑇)) · 𝑇))) |
51 | | eqeq1 2763 |
. . . 4
⊢ (𝑢 = 𝑧 → (𝑢 = 𝐵 ↔ 𝑧 = 𝐵)) |
52 | | id 22 |
. . . 4
⊢ (𝑢 = 𝑧 → 𝑢 = 𝑧) |
53 | 51, 52 | ifbieq2d 4439 |
. . 3
⊢ (𝑢 = 𝑧 → if(𝑢 = 𝐵, 𝐴, 𝑢) = if(𝑧 = 𝐵, 𝐴, 𝑧)) |
54 | 53 | cbvmptv 5128 |
. 2
⊢ (𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢)) = (𝑧 ∈ (𝐴(,]𝐵) ↦ if(𝑧 = 𝐵, 𝐴, 𝑧)) |
55 | | fourierdlem99.j |
. 2
⊢ (𝜑 → 𝐽 ∈ (0..^((♯‘({𝐶, 𝐷} ∪ {𝑦 ∈ (𝐶[,]𝐷) ∣ ∃𝑘 ∈ ℤ (𝑦 + (𝑘 · 𝑇)) ∈ ran 𝑄})) − 1))) |
56 | | eqid 2759 |
. 2
⊢ ((𝑉‘(𝐽 + 1)) − ((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘(𝑉‘(𝐽 + 1)))) = ((𝑉‘(𝐽 + 1)) − ((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘(𝑉‘(𝐽 + 1)))) |
57 | | fveq2 6651 |
. . . . . . 7
⊢ (𝑗 = 𝑖 → (𝑄‘𝑗) = (𝑄‘𝑖)) |
58 | 57 | breq1d 5035 |
. . . . . 6
⊢ (𝑗 = 𝑖 → ((𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦)) ↔ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦)))) |
59 | 58 | cbvrabv 3402 |
. . . . 5
⊢ {𝑗 ∈ (0..^𝑀) ∣ (𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))} = {𝑖 ∈ (0..^𝑀) ∣ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))} |
60 | | fveq2 6651 |
. . . . . . . 8
⊢ (𝑦 = 𝑥 → ((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦) = ((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥)) |
61 | 60 | fveq2d 6655 |
. . . . . . 7
⊢ (𝑦 = 𝑥 → ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦)) = ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥))) |
62 | 61 | breq2d 5037 |
. . . . . 6
⊢ (𝑦 = 𝑥 → ((𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦)) ↔ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥)))) |
63 | 62 | rabbidv 3390 |
. . . . 5
⊢ (𝑦 = 𝑥 → {𝑖 ∈ (0..^𝑀) ∣ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))} = {𝑖 ∈ (0..^𝑀) ∣ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥))}) |
64 | 59, 63 | syl5eq 2806 |
. . . 4
⊢ (𝑦 = 𝑥 → {𝑗 ∈ (0..^𝑀) ∣ (𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))} = {𝑖 ∈ (0..^𝑀) ∣ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥))}) |
65 | 64 | supeq1d 8928 |
. . 3
⊢ (𝑦 = 𝑥 → sup({𝑗 ∈ (0..^𝑀) ∣ (𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ) = sup({𝑖 ∈ (0..^𝑀) ∣ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥))}, ℝ, < )) |
66 | 65 | cbvmptv 5128 |
. 2
⊢ (𝑦 ∈ ℝ ↦
sup({𝑗 ∈ (0..^𝑀) ∣ (𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < )) = (𝑥 ∈ ℝ ↦ sup({𝑖 ∈ (0..^𝑀) ∣ (𝑄‘𝑖) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑥))}, ℝ, < )) |
67 | | eqid 2759 |
. 2
⊢ (𝑖 ∈ (0..^𝑀) ↦ 𝐿) = (𝑖 ∈ (0..^𝑀) ↦ 𝐿) |
68 | 1, 2, 3, 4, 8, 9, 10, 11, 12, 13, 14, 20, 29, 43, 50, 54, 55, 56, 66, 67 | fourierdlem91 43190 |
1
⊢ (𝜑 → if(((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘(𝑉‘(𝐽 + 1))) = (𝑄‘(((𝑦 ∈ ℝ ↦ sup({𝑗 ∈ (0..^𝑀) ∣ (𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝐽)) + 1)), ((𝑖 ∈ (0..^𝑀) ↦ 𝐿)‘((𝑦 ∈ ℝ ↦ sup({𝑗 ∈ (0..^𝑀) ∣ (𝑄‘𝑗) ≤ ((𝑢 ∈ (𝐴(,]𝐵) ↦ if(𝑢 = 𝐵, 𝐴, 𝑢))‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘𝑦))}, ℝ, < ))‘(𝑉‘𝐽))), (𝐹‘((𝑣 ∈ ℝ ↦ (𝑣 + ((⌊‘((𝐵 − 𝑣) / 𝑇)) · 𝑇)))‘(𝑉‘(𝐽 + 1))))) ∈ ((𝐹 ↾ ((𝑉‘𝐽)(,)(𝑉‘(𝐽 + 1)))) limℂ (𝑉‘(𝐽 + 1)))) |