ftc1anclem2 - Mathbox for Brendan Leahy

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Theorem ftc1anclem2 36562

Description: Lemma for ftc1anc 36569- restriction of an integrable function to the absolute value of its real or imaginary part. (Contributed by Brendan Leahy, 19-Jun-2018.) (Revised by Brendan Leahy, 8-Aug-2018.)

**Assertion**
Ref	Expression
ftc1anclem2	⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹ ∧ 𝐺 ∈ {ℜ, ℑ}) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)

Distinct variable groups: 𝑡,𝐹 𝑡,𝐴 𝑡,𝐺

Proof of Theorem ftc1anclem2 Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elpri 4651	. . 3 ⊢ (𝐺 ∈ {ℜ, ℑ} → (𝐺 = ℜ ∨ 𝐺 = ℑ))
2		fveq1 6891	. . . . . . . . . 10 ⊢ (𝐺 = ℜ → (𝐺‘(𝐹‘𝑡)) = (ℜ‘(𝐹‘𝑡)))
3	2	fveq2d 6896	. . . . . . . . 9 ⊢ (𝐺 = ℜ → (abs‘(𝐺‘(𝐹‘𝑡))) = (abs‘(ℜ‘(𝐹‘𝑡))))
4	3	ifeq1d 4548	. . . . . . . 8 ⊢ (𝐺 = ℜ → if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0) = if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))
5	4	mpteq2dv 5251	. . . . . . 7 ⊢ (𝐺 = ℜ → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0)))
6	5	fveq2d 6896	. . . . . 6 ⊢ (𝐺 = ℜ → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) = (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))))
7	6	adantl 483	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℜ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) = (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))))
8		ffvelcdm 7084	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (𝐹‘𝑡) ∈ ℂ)
9	8	recld 15141	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℜ‘(𝐹‘𝑡)) ∈ ℝ)
10	9	adantlr 714	. . . . . . . . 9 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝑡 ∈ 𝐴) → (ℜ‘(𝐹‘𝑡)) ∈ ℝ)
11		simpl 484	. . . . . . . . . . . . 13 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹:𝐴⟶ℂ)
12	11	feqmptd 6961	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹 = (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)))
13		simpr 486	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹 ∈ 𝐿¹)
14	12, 13	eqeltrrd 2835	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
15	8	iblcn 25316	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → ((𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ 𝐿¹ ↔ ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹ ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹)))
16	15	biimpa 478	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹ ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹))
17	14, 16	syldan 592	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹ ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹))
18	17	simpld 496	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹)
19	9	recnd 11242	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℜ‘(𝐹‘𝑡)) ∈ ℂ)
20		eqidd 2734	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) = (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))))
21		absf 15284	. . . . . . . . . . . . . 14 ⊢ abs:ℂ⟶ℝ
22	21	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝐹:𝐴⟶ℂ → abs:ℂ⟶ℝ)
23	22	feqmptd 6961	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → abs = (𝑥 ∈ ℂ ↦ (abs‘𝑥)))
24		fveq2 6892	. . . . . . . . . . . 12 ⊢ (𝑥 = (ℜ‘(𝐹‘𝑡)) → (abs‘𝑥) = (abs‘(ℜ‘(𝐹‘𝑡))))
25	19, 20, 23, 24	fmptco 7127	. . . . . . . . . . 11 ⊢ (𝐹:𝐴⟶ℂ → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))))
26	25	adantr 482	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))))
27	9	fmpttd 7115	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))):𝐴⟶ℝ)
28	27	adantr 482	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))):𝐴⟶ℝ)
29		iblmbf 25285	. . . . . . . . . . . . . . 15 ⊢ (𝐹 ∈ 𝐿¹ → 𝐹 ∈ MblFn)
30	29	adantl 483	. . . . . . . . . . . . . 14 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹 ∈ MblFn)
31	12, 30	eqeltrrd 2835	. . . . . . . . . . . . 13 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ MblFn)
32	8	ismbfcn2 25155	. . . . . . . . . . . . . 14 ⊢ (𝐹:𝐴⟶ℂ → ((𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ MblFn ↔ ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn)))
33	32	biimpa 478	. . . . . . . . . . . . 13 ⊢ ((𝐹:𝐴⟶ℂ ∧ (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ MblFn) → ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn))
34	31, 33	syldan 592	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn))
35	34	simpld 496	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn)
36		ftc1anclem1 36561	. . . . . . . . . . 11 ⊢ (((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))):𝐴⟶ℝ ∧ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) ∈ MblFn)
37	28, 35, 36	syl2anc 585	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) ∈ MblFn)
38	26, 37	eqeltrrd 2835	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ MblFn)
39	10, 18, 38	iblabsnc 36552	. . . . . . . 8 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ 𝐿¹)
40	19	abscld 15383	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (abs‘(ℜ‘(𝐹‘𝑡))) ∈ ℝ)
41	19	absge0d 15391	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → 0 ≤ (abs‘(ℜ‘(𝐹‘𝑡))))
42	40, 41	iblpos 25310	. . . . . . . . 9 ⊢ (𝐹:𝐴⟶ℂ → ((𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ 𝐿¹ ↔ ((𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ MblFn ∧ (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ)))
43	42	adantr 482	. . . . . . . 8 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ 𝐿¹ ↔ ((𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ MblFn ∧ (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ)))
44	39, 43	mpbid 231	. . . . . . 7 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ MblFn ∧ (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ))
45	44	simprd 497	. . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
46	45	adantr 482	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℜ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
47	7, 46	eqeltrd 2834	. . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℜ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
48		fveq1 6891	. . . . . . . . . 10 ⊢ (𝐺 = ℑ → (𝐺‘(𝐹‘𝑡)) = (ℑ‘(𝐹‘𝑡)))
49	48	fveq2d 6896	. . . . . . . . 9 ⊢ (𝐺 = ℑ → (abs‘(𝐺‘(𝐹‘𝑡))) = (abs‘(ℑ‘(𝐹‘𝑡))))
50	49	ifeq1d 4548	. . . . . . . 8 ⊢ (𝐺 = ℑ → if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0) = if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))
51	50	mpteq2dv 5251	. . . . . . 7 ⊢ (𝐺 = ℑ → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0)))
52	51	fveq2d 6896	. . . . . 6 ⊢ (𝐺 = ℑ → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) = (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))))
53	52	adantl 483	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℑ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) = (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))))
54	8	imcld 15142	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℑ‘(𝐹‘𝑡)) ∈ ℝ)
55	54	recnd 11242	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℑ‘(𝐹‘𝑡)) ∈ ℂ)
56	55	adantlr 714	. . . . . . . . 9 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝑡 ∈ 𝐴) → (ℑ‘(𝐹‘𝑡)) ∈ ℂ)
57	17	simprd 497	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹)
58		eqidd 2734	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) = (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))))
59		fveq2 6892	. . . . . . . . . . . 12 ⊢ (𝑥 = (ℑ‘(𝐹‘𝑡)) → (abs‘𝑥) = (abs‘(ℑ‘(𝐹‘𝑡))))
60	55, 58, 23, 59	fmptco 7127	. . . . . . . . . . 11 ⊢ (𝐹:𝐴⟶ℂ → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))))
61	60	adantr 482	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))))
62	54	fmpttd 7115	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))):𝐴⟶ℝ)
63	62	adantr 482	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))):𝐴⟶ℝ)
64	34	simprd 497	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn)
65		ftc1anclem1 36561	. . . . . . . . . . 11 ⊢ (((𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))):𝐴⟶ℝ ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) ∈ MblFn)
66	63, 64, 65	syl2anc 585	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) ∈ MblFn)
67	61, 66	eqeltrrd 2835	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ MblFn)
68	56, 57, 67	iblabsnc 36552	. . . . . . . 8 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ 𝐿¹)
69	55	abscld 15383	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (abs‘(ℑ‘(𝐹‘𝑡))) ∈ ℝ)
70	55	absge0d 15391	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → 0 ≤ (abs‘(ℑ‘(𝐹‘𝑡))))
71	69, 70	iblpos 25310	. . . . . . . . 9 ⊢ (𝐹:𝐴⟶ℂ → ((𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ 𝐿¹ ↔ ((𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ MblFn ∧ (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ)))
72	71	adantr 482	. . . . . . . 8 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ 𝐿¹ ↔ ((𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ MblFn ∧ (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ)))
73	68, 72	mpbid 231	. . . . . . 7 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ MblFn ∧ (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ))
74	73	simprd 497	. . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
75	74	adantr 482	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℑ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
76	53, 75	eqeltrd 2834	. . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℑ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
77	47, 76	jaodan 957	. . 3 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ (𝐺 = ℜ ∨ 𝐺 = ℑ)) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
78	1, 77	sylan2 594	. 2 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 ∈ {ℜ, ℑ}) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
79	78	3impa 1111	1 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹ ∧ 𝐺 ∈ {ℜ, ℑ}) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ifcif 4529 {cpr 4631 ↦ cmpt 5232 ∘ ccom 5681 ⟶wf 6540 ‘cfv 6544 ℂcc 11108 ℝcr 11109 0cc0 11110 ℜcre 15044 ℑcim 15045 abscabs 15181 MblFncmbf 25131 ∫₂citg2 25133 𝐿¹cibl 25134

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188 ax-addf 11189

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-disj 5115 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-of 7670 df-ofr 7671 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-2o 8467 df-er 8703 df-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fi 9406 df-sup 9437 df-inf 9438 df-oi 9505 df-dju 9896 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-ioo 13328 df-ico 13330 df-icc 13331 df-fz 13485 df-fzo 13628 df-fl 13757 df-seq 13967 df-exp 14028 df-hash 14291 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-sum 15633 df-rest 17368 df-topgen 17389 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-top 22396 df-topon 22413 df-bases 22449 df-cmp 22891 df-ovol 24981 df-vol 24982 df-mbf 25136 df-itg1 25137 df-itg2 25138 df-ibl 25139 df-0p 25187

This theorem is referenced by: ftc1anclem8 36568

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