ftc1anclem2 - Mathbox for Brendan Leahy

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Theorem ftc1anclem2 36550

Description: Lemma for ftc1anc 36557- 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 4649	. . 3 ⊢ (𝐺 ∈ {ℜ, ℑ} → (𝐺 = ℜ ∨ 𝐺 = ℑ))
2		fveq1 6887	. . . . . . . . . 10 ⊢ (𝐺 = ℜ → (𝐺‘(𝐹‘𝑡)) = (ℜ‘(𝐹‘𝑡)))
3	2	fveq2d 6892	. . . . . . . . 9 ⊢ (𝐺 = ℜ → (abs‘(𝐺‘(𝐹‘𝑡))) = (abs‘(ℜ‘(𝐹‘𝑡))))
4	3	ifeq1d 4546	. . . . . . . 8 ⊢ (𝐺 = ℜ → if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0) = if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))
5	4	mpteq2dv 5249	. . . . . . 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 6892	. . . . . 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 482	. . . . 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 7080	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (𝐹‘𝑡) ∈ ℂ)
9	8	recld 15137	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℜ‘(𝐹‘𝑡)) ∈ ℝ)
10	9	adantlr 713	. . . . . . . . 9 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝑡 ∈ 𝐴) → (ℜ‘(𝐹‘𝑡)) ∈ ℝ)
11		simpl 483	. . . . . . . . . . . . 13 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹:𝐴⟶ℂ)
12	11	feqmptd 6957	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹 = (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)))
13		simpr 485	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹 ∈ 𝐿¹)
14	12, 13	eqeltrrd 2834	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ 𝐿¹)
15	8	iblcn 25307	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → ((𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ 𝐿¹ ↔ ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹ ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹)))
16	15	biimpa 477	. . . . . . . . . . 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 591	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹ ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹))
18	17	simpld 495	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ 𝐿¹)
19	9	recnd 11238	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℜ‘(𝐹‘𝑡)) ∈ ℂ)
20		eqidd 2733	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) = (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))))
21		absf 15280	. . . . . . . . . . . . . 14 ⊢ abs:ℂ⟶ℝ
22	21	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝐹:𝐴⟶ℂ → abs:ℂ⟶ℝ)
23	22	feqmptd 6957	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → abs = (𝑥 ∈ ℂ ↦ (abs‘𝑥)))
24		fveq2 6888	. . . . . . . . . . . 12 ⊢ (𝑥 = (ℜ‘(𝐹‘𝑡)) → (abs‘𝑥) = (abs‘(ℜ‘(𝐹‘𝑡))))
25	19, 20, 23, 24	fmptco 7123	. . . . . . . . . . 11 ⊢ (𝐹:𝐴⟶ℂ → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))))
26	25	adantr 481	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))))
27	9	fmpttd 7111	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))):𝐴⟶ℝ)
28	27	adantr 481	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))):𝐴⟶ℝ)
29		iblmbf 25276	. . . . . . . . . . . . . . 15 ⊢ (𝐹 ∈ 𝐿¹ → 𝐹 ∈ MblFn)
30	29	adantl 482	. . . . . . . . . . . . . 14 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → 𝐹 ∈ MblFn)
31	12, 30	eqeltrrd 2834	. . . . . . . . . . . . 13 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ MblFn)
32	8	ismbfcn2 25146	. . . . . . . . . . . . . 14 ⊢ (𝐹:𝐴⟶ℂ → ((𝑡 ∈ 𝐴 ↦ (𝐹‘𝑡)) ∈ MblFn ↔ ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn)))
33	32	biimpa 477	. . . . . . . . . . . . 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 591	. . . . . . . . . . . 12 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → ((𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn ∧ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn))
35	34	simpld 495	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡))) ∈ MblFn)
36		ftc1anclem1 36549	. . . . . . . . . . 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 584	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℜ‘(𝐹‘𝑡)))) ∈ MblFn)
38	26, 37	eqeltrrd 2834	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ MblFn)
39	10, 18, 38	iblabsnc 36540	. . . . . . . 8 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℜ‘(𝐹‘𝑡)))) ∈ 𝐿¹)
40	19	abscld 15379	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (abs‘(ℜ‘(𝐹‘𝑡))) ∈ ℝ)
41	19	absge0d 15387	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → 0 ≤ (abs‘(ℜ‘(𝐹‘𝑡))))
42	40, 41	iblpos 25301	. . . . . . . . 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 481	. . . . . . . 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 496	. . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
46	45	adantr 481	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℜ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℜ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
47	7, 46	eqeltrd 2833	. . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℜ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
48		fveq1 6887	. . . . . . . . . 10 ⊢ (𝐺 = ℑ → (𝐺‘(𝐹‘𝑡)) = (ℑ‘(𝐹‘𝑡)))
49	48	fveq2d 6892	. . . . . . . . 9 ⊢ (𝐺 = ℑ → (abs‘(𝐺‘(𝐹‘𝑡))) = (abs‘(ℑ‘(𝐹‘𝑡))))
50	49	ifeq1d 4546	. . . . . . . 8 ⊢ (𝐺 = ℑ → if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0) = if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))
51	50	mpteq2dv 5249	. . . . . . 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 6892	. . . . . 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 482	. . . . 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 15138	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℑ‘(𝐹‘𝑡)) ∈ ℝ)
55	54	recnd 11238	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (ℑ‘(𝐹‘𝑡)) ∈ ℂ)
56	55	adantlr 713	. . . . . . . . 9 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝑡 ∈ 𝐴) → (ℑ‘(𝐹‘𝑡)) ∈ ℂ)
57	17	simprd 496	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ 𝐿¹)
58		eqidd 2733	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) = (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))))
59		fveq2 6888	. . . . . . . . . . . 12 ⊢ (𝑥 = (ℑ‘(𝐹‘𝑡)) → (abs‘𝑥) = (abs‘(ℑ‘(𝐹‘𝑡))))
60	55, 58, 23, 59	fmptco 7123	. . . . . . . . . . 11 ⊢ (𝐹:𝐴⟶ℂ → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))))
61	60	adantr 481	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) = (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))))
62	54	fmpttd 7111	. . . . . . . . . . . 12 ⊢ (𝐹:𝐴⟶ℂ → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))):𝐴⟶ℝ)
63	62	adantr 481	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))):𝐴⟶ℝ)
64	34	simprd 496	. . . . . . . . . . 11 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡))) ∈ MblFn)
65		ftc1anclem1 36549	. . . . . . . . . . 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 584	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (abs ∘ (𝑡 ∈ 𝐴 ↦ (ℑ‘(𝐹‘𝑡)))) ∈ MblFn)
67	61, 66	eqeltrrd 2834	. . . . . . . . 9 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ MblFn)
68	56, 57, 67	iblabsnc 36540	. . . . . . . 8 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (𝑡 ∈ 𝐴 ↦ (abs‘(ℑ‘(𝐹‘𝑡)))) ∈ 𝐿¹)
69	55	abscld 15379	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → (abs‘(ℑ‘(𝐹‘𝑡))) ∈ ℝ)
70	55	absge0d 15387	. . . . . . . . . 10 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝑡 ∈ 𝐴) → 0 ≤ (abs‘(ℑ‘(𝐹‘𝑡))))
71	69, 70	iblpos 25301	. . . . . . . . 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 481	. . . . . . . 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 496	. . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
75	74	adantr 481	. . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℑ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(ℑ‘(𝐹‘𝑡))), 0))) ∈ ℝ)
76	53, 75	eqeltrd 2833	. . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 = ℑ) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
77	47, 76	jaodan 956	. . 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 593	. 2 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐹 ∈ 𝐿¹) ∧ 𝐺 ∈ {ℜ, ℑ}) → (∫₂‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐴, (abs‘(𝐺‘(𝐹‘𝑡))), 0))) ∈ ℝ)
79	78	3impa 1110	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 396 ∨ wo 845 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ifcif 4527 {cpr 4629 ↦ cmpt 5230 ∘ ccom 5679 ⟶wf 6536 ‘cfv 6540 ℂcc 11104 ℝcr 11105 0cc0 11106 ℜcre 15040 ℑcim 15041 abscabs 15177 MblFncmbf 25122 ∫₂citg2 25124 𝐿¹cibl 25125

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-inf2 9632 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 ax-addf 11185

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-disj 5113 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-ofr 7667 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-er 8699 df-map 8818 df-pm 8819 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fi 9402 df-sup 9433 df-inf 9434 df-oi 9501 df-dju 9892 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-n0 12469 df-z 12555 df-uz 12819 df-q 12929 df-rp 12971 df-xneg 13088 df-xadd 13089 df-xmul 13090 df-ioo 13324 df-ico 13326 df-icc 13327 df-fz 13481 df-fzo 13624 df-fl 13753 df-seq 13963 df-exp 14024 df-hash 14287 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-clim 15428 df-sum 15629 df-rest 17364 df-topgen 17385 df-psmet 20928 df-xmet 20929 df-met 20930 df-bl 20931 df-mopn 20932 df-top 22387 df-topon 22404 df-bases 22440 df-cmp 22882 df-ovol 24972 df-vol 24973 df-mbf 25127 df-itg1 25128 df-itg2 25129 df-ibl 25130 df-0p 25178

This theorem is referenced by: ftc1anclem8 36556

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