Proof of Theorem ibladd
Step | Hyp | Ref
| Expression |
1 | | itgadd.2 |
. . . . . . 7
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈
𝐿1) |
2 | | eqid 2738 |
. . . . . . . 8
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐵)), (ℜ‘𝐵), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐵)), (ℜ‘𝐵), 0))) |
3 | | eqid 2738 |
. . . . . . . 8
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐵)), -(ℜ‘𝐵), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐵)), -(ℜ‘𝐵), 0))) |
4 | | eqid 2738 |
. . . . . . . 8
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐵)), (ℑ‘𝐵), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐵)), (ℑ‘𝐵), 0))) |
5 | | eqid 2738 |
. . . . . . . 8
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐵)), -(ℑ‘𝐵), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐵)), -(ℑ‘𝐵), 0))) |
6 | | itgadd.1 |
. . . . . . . 8
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) |
7 | 2, 3, 4, 5, 6 | iblcnlem 24858 |
. . . . . . 7
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵) ∈ 𝐿1 ↔
((𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐵)), (ℜ‘𝐵), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐵)), -(ℜ‘𝐵), 0))) ∈ ℝ) ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐵)), (ℑ‘𝐵), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐵)), -(ℑ‘𝐵), 0))) ∈
ℝ)))) |
8 | 1, 7 | mpbid 231 |
. . . . . 6
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐵)), (ℜ‘𝐵), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐵)), -(ℜ‘𝐵), 0))) ∈ ℝ) ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐵)), (ℑ‘𝐵), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐵)), -(ℑ‘𝐵), 0))) ∈
ℝ))) |
9 | 8 | simp1d 1140 |
. . . . 5
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn) |
10 | 9, 6 | mbfdm2 24706 |
. . . 4
⊢ (𝜑 → 𝐴 ∈ dom vol) |
11 | | itgadd.3 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ 𝑉) |
12 | | eqidd 2739 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)) |
13 | | eqidd 2739 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐴 ↦ 𝐶)) |
14 | 10, 6, 11, 12, 13 | offval2 7531 |
. . 3
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵) ∘f + (𝑥 ∈ 𝐴 ↦ 𝐶)) = (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶))) |
15 | | itgadd.4 |
. . . . . 6
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) ∈
𝐿1) |
16 | | eqid 2738 |
. . . . . . 7
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐶)), (ℜ‘𝐶), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐶)), (ℜ‘𝐶), 0))) |
17 | | eqid 2738 |
. . . . . . 7
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐶)), -(ℜ‘𝐶), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐶)), -(ℜ‘𝐶), 0))) |
18 | | eqid 2738 |
. . . . . . 7
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐶)), (ℑ‘𝐶), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐶)), (ℑ‘𝐶), 0))) |
19 | | eqid 2738 |
. . . . . . 7
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐶)), -(ℑ‘𝐶), 0))) =
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐶)), -(ℑ‘𝐶), 0))) |
20 | 16, 17, 18, 19, 11 | iblcnlem 24858 |
. . . . . 6
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐶) ∈ 𝐿1 ↔
((𝑥 ∈ 𝐴 ↦ 𝐶) ∈ MblFn ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐶)), (ℜ‘𝐶), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐶)), -(ℜ‘𝐶), 0))) ∈ ℝ) ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐶)), (ℑ‘𝐶), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐶)), -(ℑ‘𝐶), 0))) ∈
ℝ)))) |
21 | 15, 20 | mpbid 231 |
. . . . 5
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐶) ∈ MblFn ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐶)), (ℜ‘𝐶), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐶)), -(ℜ‘𝐶), 0))) ∈ ℝ) ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐶)), (ℑ‘𝐶), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐶)), -(ℑ‘𝐶), 0))) ∈
ℝ))) |
22 | 21 | simp1d 1140 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) ∈ MblFn) |
23 | 9, 22 | mbfadd 24730 |
. . 3
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵) ∘f + (𝑥 ∈ 𝐴 ↦ 𝐶)) ∈ MblFn) |
24 | 14, 23 | eqeltrrd 2840 |
. 2
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ∈ MblFn) |
25 | 9, 6 | mbfmptcl 24705 |
. . . . 5
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℂ) |
26 | 25 | recld 14833 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℜ‘𝐵) ∈ ℝ) |
27 | 22, 11 | mbfmptcl 24705 |
. . . . 5
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ ℂ) |
28 | 27 | recld 14833 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℜ‘𝐶) ∈ ℝ) |
29 | 25, 27 | readdd 14853 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℜ‘(𝐵 + 𝐶)) = ((ℜ‘𝐵) + (ℜ‘𝐶))) |
30 | 25 | ismbfcn2 24707 |
. . . . . 6
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn ↔ ((𝑥 ∈ 𝐴 ↦ (ℜ‘𝐵)) ∈ MblFn ∧ (𝑥 ∈ 𝐴 ↦ (ℑ‘𝐵)) ∈ MblFn))) |
31 | 9, 30 | mpbid 231 |
. . . . 5
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ (ℜ‘𝐵)) ∈ MblFn ∧ (𝑥 ∈ 𝐴 ↦ (ℑ‘𝐵)) ∈ MblFn)) |
32 | 31 | simpld 494 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (ℜ‘𝐵)) ∈ MblFn) |
33 | 27 | ismbfcn2 24707 |
. . . . . 6
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐶) ∈ MblFn ↔ ((𝑥 ∈ 𝐴 ↦ (ℜ‘𝐶)) ∈ MblFn ∧ (𝑥 ∈ 𝐴 ↦ (ℑ‘𝐶)) ∈ MblFn))) |
34 | 22, 33 | mpbid 231 |
. . . . 5
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ (ℜ‘𝐶)) ∈ MblFn ∧ (𝑥 ∈ 𝐴 ↦ (ℑ‘𝐶)) ∈ MblFn)) |
35 | 34 | simpld 494 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (ℜ‘𝐶)) ∈ MblFn) |
36 | 8 | simp2d 1141 |
. . . . 5
⊢ (𝜑 →
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐵)), (ℜ‘𝐵), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐵)), -(ℜ‘𝐵), 0))) ∈
ℝ)) |
37 | 36 | simpld 494 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐵)), (ℜ‘𝐵), 0))) ∈
ℝ) |
38 | 21 | simp2d 1141 |
. . . . 5
⊢ (𝜑 →
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐶)), (ℜ‘𝐶), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐶)), -(ℜ‘𝐶), 0))) ∈
ℝ)) |
39 | 38 | simpld 494 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘𝐶)), (ℜ‘𝐶), 0))) ∈
ℝ) |
40 | 26, 28, 29, 32, 35, 37, 39 | ibladdlem 24889 |
. . 3
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘(𝐵 + 𝐶))), (ℜ‘(𝐵 + 𝐶)), 0))) ∈ ℝ) |
41 | 26 | renegcld 11332 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℜ‘𝐵) ∈ ℝ) |
42 | 28 | renegcld 11332 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℜ‘𝐶) ∈ ℝ) |
43 | 29 | negeqd 11145 |
. . . . 5
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℜ‘(𝐵 + 𝐶)) = -((ℜ‘𝐵) + (ℜ‘𝐶))) |
44 | 26 | recnd 10934 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℜ‘𝐵) ∈ ℂ) |
45 | 28 | recnd 10934 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℜ‘𝐶) ∈ ℂ) |
46 | 44, 45 | negdid 11275 |
. . . . 5
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -((ℜ‘𝐵) + (ℜ‘𝐶)) = (-(ℜ‘𝐵) + -(ℜ‘𝐶))) |
47 | 43, 46 | eqtrd 2778 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℜ‘(𝐵 + 𝐶)) = (-(ℜ‘𝐵) + -(ℜ‘𝐶))) |
48 | 26, 32 | mbfneg 24719 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ -(ℜ‘𝐵)) ∈ MblFn) |
49 | 28, 35 | mbfneg 24719 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ -(ℜ‘𝐶)) ∈ MblFn) |
50 | 36 | simprd 495 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐵)), -(ℜ‘𝐵), 0))) ∈
ℝ) |
51 | 38 | simprd 495 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘𝐶)), -(ℜ‘𝐶), 0))) ∈
ℝ) |
52 | 41, 42, 47, 48, 49, 50, 51 | ibladdlem 24889 |
. . 3
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘(𝐵 + 𝐶))), -(ℜ‘(𝐵 + 𝐶)), 0))) ∈ ℝ) |
53 | 40, 52 | jca 511 |
. 2
⊢ (𝜑 →
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘(𝐵 + 𝐶))), (ℜ‘(𝐵 + 𝐶)), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘(𝐵 + 𝐶))), -(ℜ‘(𝐵 + 𝐶)), 0))) ∈ ℝ)) |
54 | 25 | imcld 14834 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℑ‘𝐵) ∈ ℝ) |
55 | 27 | imcld 14834 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℑ‘𝐶) ∈ ℝ) |
56 | 25, 27 | imaddd 14854 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℑ‘(𝐵 + 𝐶)) = ((ℑ‘𝐵) + (ℑ‘𝐶))) |
57 | 31 | simprd 495 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (ℑ‘𝐵)) ∈ MblFn) |
58 | 34 | simprd 495 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (ℑ‘𝐶)) ∈ MblFn) |
59 | 8 | simp3d 1142 |
. . . . 5
⊢ (𝜑 →
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐵)), (ℑ‘𝐵), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐵)), -(ℑ‘𝐵), 0))) ∈
ℝ)) |
60 | 59 | simpld 494 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐵)), (ℑ‘𝐵), 0))) ∈
ℝ) |
61 | 21 | simp3d 1142 |
. . . . 5
⊢ (𝜑 →
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐶)), (ℑ‘𝐶), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐶)), -(ℑ‘𝐶), 0))) ∈
ℝ)) |
62 | 61 | simpld 494 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘𝐶)), (ℑ‘𝐶), 0))) ∈
ℝ) |
63 | 54, 55, 56, 57, 58, 60, 62 | ibladdlem 24889 |
. . 3
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘(𝐵 + 𝐶))), (ℑ‘(𝐵 + 𝐶)), 0))) ∈ ℝ) |
64 | 54 | renegcld 11332 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℑ‘𝐵) ∈ ℝ) |
65 | 55 | renegcld 11332 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℑ‘𝐶) ∈ ℝ) |
66 | 56 | negeqd 11145 |
. . . . 5
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℑ‘(𝐵 + 𝐶)) = -((ℑ‘𝐵) + (ℑ‘𝐶))) |
67 | 54 | recnd 10934 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℑ‘𝐵) ∈ ℂ) |
68 | 55 | recnd 10934 |
. . . . . 6
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (ℑ‘𝐶) ∈ ℂ) |
69 | 67, 68 | negdid 11275 |
. . . . 5
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -((ℑ‘𝐵) + (ℑ‘𝐶)) = (-(ℑ‘𝐵) + -(ℑ‘𝐶))) |
70 | 66, 69 | eqtrd 2778 |
. . . 4
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -(ℑ‘(𝐵 + 𝐶)) = (-(ℑ‘𝐵) + -(ℑ‘𝐶))) |
71 | 54, 57 | mbfneg 24719 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ -(ℑ‘𝐵)) ∈ MblFn) |
72 | 55, 58 | mbfneg 24719 |
. . . 4
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ -(ℑ‘𝐶)) ∈ MblFn) |
73 | 59 | simprd 495 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐵)), -(ℑ‘𝐵), 0))) ∈
ℝ) |
74 | 61 | simprd 495 |
. . . 4
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘𝐶)), -(ℑ‘𝐶), 0))) ∈
ℝ) |
75 | 64, 65, 70, 71, 72, 73, 74 | ibladdlem 24889 |
. . 3
⊢ (𝜑 →
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘(𝐵 + 𝐶))), -(ℑ‘(𝐵 + 𝐶)), 0))) ∈ ℝ) |
76 | 63, 75 | jca 511 |
. 2
⊢ (𝜑 →
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘(𝐵 + 𝐶))), (ℑ‘(𝐵 + 𝐶)), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘(𝐵 + 𝐶))), -(ℑ‘(𝐵 + 𝐶)), 0))) ∈ ℝ)) |
77 | | eqid 2738 |
. . 3
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘(𝐵 + 𝐶))), (ℜ‘(𝐵 + 𝐶)), 0))) = (∫2‘(𝑥 ∈ ℝ ↦
if((𝑥 ∈ 𝐴 ∧ 0 ≤
(ℜ‘(𝐵 + 𝐶))), (ℜ‘(𝐵 + 𝐶)), 0))) |
78 | | eqid 2738 |
. . 3
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘(𝐵 + 𝐶))), -(ℜ‘(𝐵 + 𝐶)), 0))) = (∫2‘(𝑥 ∈ ℝ ↦
if((𝑥 ∈ 𝐴 ∧ 0 ≤
-(ℜ‘(𝐵 + 𝐶))), -(ℜ‘(𝐵 + 𝐶)), 0))) |
79 | | eqid 2738 |
. . 3
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘(𝐵 + 𝐶))), (ℑ‘(𝐵 + 𝐶)), 0))) = (∫2‘(𝑥 ∈ ℝ ↦
if((𝑥 ∈ 𝐴 ∧ 0 ≤
(ℑ‘(𝐵 + 𝐶))), (ℑ‘(𝐵 + 𝐶)), 0))) |
80 | | eqid 2738 |
. . 3
⊢
(∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘(𝐵 + 𝐶))), -(ℑ‘(𝐵 + 𝐶)), 0))) = (∫2‘(𝑥 ∈ ℝ ↦
if((𝑥 ∈ 𝐴 ∧ 0 ≤
-(ℑ‘(𝐵 + 𝐶))), -(ℑ‘(𝐵 + 𝐶)), 0))) |
81 | | ovexd 7290 |
. . 3
⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐵 + 𝐶) ∈ V) |
82 | 77, 78, 79, 80, 81 | iblcnlem 24858 |
. 2
⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ∈ 𝐿1 ↔
((𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ∈ MblFn ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℜ‘(𝐵 + 𝐶))), (ℜ‘(𝐵 + 𝐶)), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℜ‘(𝐵 + 𝐶))), -(ℜ‘(𝐵 + 𝐶)), 0))) ∈ ℝ) ∧
((∫2‘(𝑥 ∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ (ℑ‘(𝐵 + 𝐶))), (ℑ‘(𝐵 + 𝐶)), 0))) ∈ ℝ ∧
(∫2‘(𝑥
∈ ℝ ↦ if((𝑥 ∈ 𝐴 ∧ 0 ≤ -(ℑ‘(𝐵 + 𝐶))), -(ℑ‘(𝐵 + 𝐶)), 0))) ∈ ℝ)))) |
83 | 24, 53, 76, 82 | mpbir3and 1340 |
1
⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (𝐵 + 𝐶)) ∈
𝐿1) |