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Theorem muinv 27124

Description: The Möbius inversion formula. If 𝐺(𝑛) = Σ𝑘 ∥ 𝑛𝐹(𝑘) for every 𝑛 ∈ ℕ, then 𝐹(𝑛) = Σ𝑘 ∥ 𝑛 μ(𝑘)𝐺(𝑛 / 𝑘) = Σ𝑘 ∥ 𝑛μ(𝑛 / 𝑘)𝐺(𝑘), i.e. the Möbius function is the Dirichlet convolution inverse of the constant function 1. Theorem 2.9 in [ApostolNT] p. 32. (Contributed by Mario Carneiro, 2-Jul-2015.)

**Hypotheses**
Ref	Expression
muinv.1	⊢ (𝜑 → 𝐹:ℕ⟶ℂ)
muinv.2	⊢ (𝜑 → 𝐺 = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘)))

**Assertion**
Ref	Expression
muinv	⊢ (𝜑 → 𝐹 = (𝑚 ∈ ℕ ↦ Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗)))))

Distinct variable groups: 𝑘,𝑚,𝑗,𝑛,𝐹 𝑥,𝑗,𝑘,𝑚,𝑛 𝜑,𝑗,𝑘,𝑚 Allowed substitution hints: 𝜑(𝑥,𝑛) 𝐹(𝑥) 𝐺(𝑥,𝑗,𝑘,𝑚,𝑛)

**Proof of Theorem muinv**
Step	Hyp	Ref	Expression
1		muinv.1	. . 3 ⊢ (𝜑 → 𝐹:ℕ⟶ℂ)
2	1	feqmptd 6967	. 2 ⊢ (𝜑 → 𝐹 = (𝑚 ∈ ℕ ↦ (𝐹‘𝑚)))
3		muinv.2	. . . . . . . . . 10 ⊢ (𝜑 → 𝐺 = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘)))
4	3	ad2antrr 725	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝐺 = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘)))
5	4	fveq1d 6899	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝐺‘(𝑚 / 𝑗)) = ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘))‘(𝑚 / 𝑗)))
6		breq1 5151	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑗 → (𝑥 ∥ 𝑚 ↔ 𝑗 ∥ 𝑚))
7	6	elrab 3682	. . . . . . . . . . . . 13 ⊢ (𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ↔ (𝑗 ∈ ℕ ∧ 𝑗 ∥ 𝑚))
8	7	simprbi 496	. . . . . . . . . . . 12 ⊢ (𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} → 𝑗 ∥ 𝑚)
9	8	adantl 481	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑗 ∥ 𝑚)
10		elrabi 3676	. . . . . . . . . . . . . 14 ⊢ (𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} → 𝑗 ∈ ℕ)
11	10	adantl 481	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑗 ∈ ℕ)
12	11	nnzd 12615	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑗 ∈ ℤ)
13	11	nnne0d 12292	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑗 ≠ 0)
14		nnz 12609	. . . . . . . . . . . . 13 ⊢ (𝑚 ∈ ℕ → 𝑚 ∈ ℤ)
15	14	ad2antlr 726	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑚 ∈ ℤ)
16		dvdsval2 16233	. . . . . . . . . . . 12 ⊢ ((𝑗 ∈ ℤ ∧ 𝑗 ≠ 0 ∧ 𝑚 ∈ ℤ) → (𝑗 ∥ 𝑚 ↔ (𝑚 / 𝑗) ∈ ℤ))
17	12, 13, 15, 16	syl3anc 1369	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑗 ∥ 𝑚 ↔ (𝑚 / 𝑗) ∈ ℤ))
18	9, 17	mpbid 231	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑚 / 𝑗) ∈ ℤ)
19		nnre 12249	. . . . . . . . . . . . 13 ⊢ (𝑚 ∈ ℕ → 𝑚 ∈ ℝ)
20		nngt0 12273	. . . . . . . . . . . . 13 ⊢ (𝑚 ∈ ℕ → 0 < 𝑚)
21	19, 20	jca 511	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ ℕ → (𝑚 ∈ ℝ ∧ 0 < 𝑚))
22	21	ad2antlr 726	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑚 ∈ ℝ ∧ 0 < 𝑚))
23		nnre 12249	. . . . . . . . . . . . 13 ⊢ (𝑗 ∈ ℕ → 𝑗 ∈ ℝ)
24		nngt0 12273	. . . . . . . . . . . . 13 ⊢ (𝑗 ∈ ℕ → 0 < 𝑗)
25	23, 24	jca 511	. . . . . . . . . . . 12 ⊢ (𝑗 ∈ ℕ → (𝑗 ∈ ℝ ∧ 0 < 𝑗))
26	11, 25	syl 17	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑗 ∈ ℝ ∧ 0 < 𝑗))
27		divgt0 12112	. . . . . . . . . . 11 ⊢ (((𝑚 ∈ ℝ ∧ 0 < 𝑚) ∧ (𝑗 ∈ ℝ ∧ 0 < 𝑗)) → 0 < (𝑚 / 𝑗))
28	22, 26, 27	syl2anc 583	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 0 < (𝑚 / 𝑗))
29		elnnz 12598	. . . . . . . . . 10 ⊢ ((𝑚 / 𝑗) ∈ ℕ ↔ ((𝑚 / 𝑗) ∈ ℤ ∧ 0 < (𝑚 / 𝑗)))
30	18, 28, 29	sylanbrc 582	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑚 / 𝑗) ∈ ℕ)
31		breq2 5152	. . . . . . . . . . . 12 ⊢ (𝑛 = (𝑚 / 𝑗) → (𝑥 ∥ 𝑛 ↔ 𝑥 ∥ (𝑚 / 𝑗)))
32	31	rabbidv 3437	. . . . . . . . . . 11 ⊢ (𝑛 = (𝑚 / 𝑗) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} = {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)})
33	32	sumeq1d 15679	. . . . . . . . . 10 ⊢ (𝑛 = (𝑚 / 𝑗) → Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘))
34		eqid 2728	. . . . . . . . . 10 ⊢ (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘)) = (𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘))
35		sumex 15666	. . . . . . . . . 10 ⊢ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘) ∈ V
36	33, 34, 35	fvmpt 7005	. . . . . . . . 9 ⊢ ((𝑚 / 𝑗) ∈ ℕ → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘))‘(𝑚 / 𝑗)) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘))
37	30, 36	syl 17	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((𝑛 ∈ ℕ ↦ Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑛} (𝐹‘𝑘))‘(𝑚 / 𝑗)) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘))
38	5, 37	eqtrd 2768	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝐺‘(𝑚 / 𝑗)) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘))
39	38	oveq2d 7436	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗))) = ((μ‘𝑗) · Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘)))
40		fzfid 13970	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (1...(𝑚 / 𝑗)) ∈ Fin)
41		dvdsssfz1 16294	. . . . . . . . 9 ⊢ ((𝑚 / 𝑗) ∈ ℕ → {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ⊆ (1...(𝑚 / 𝑗)))
42	30, 41	syl 17	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ⊆ (1...(𝑚 / 𝑗)))
43	40, 42	ssfid 9291	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ∈ Fin)
44		mucl 27072	. . . . . . . . 9 ⊢ (𝑗 ∈ ℕ → (μ‘𝑗) ∈ ℤ)
45	11, 44	syl 17	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (μ‘𝑗) ∈ ℤ)
46	45	zcnd 12697	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (μ‘𝑗) ∈ ℂ)
47	1	ad2antrr 725	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝐹:ℕ⟶ℂ)
48		elrabi 3676	. . . . . . . 8 ⊢ (𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} → 𝑘 ∈ ℕ)
49		ffvelcdm 7091	. . . . . . . 8 ⊢ ((𝐹:ℕ⟶ℂ ∧ 𝑘 ∈ ℕ) → (𝐹‘𝑘) ∈ ℂ)
50	47, 48, 49	syl2an 595	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)}) → (𝐹‘𝑘) ∈ ℂ)
51	43, 46, 50	fsummulc2 15762	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((μ‘𝑗) · Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} (𝐹‘𝑘)) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ((μ‘𝑗) · (𝐹‘𝑘)))
52	39, 51	eqtrd 2768	. . . . 5 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗))) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ((μ‘𝑗) · (𝐹‘𝑘)))
53	52	sumeq2dv 15681	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗))) = Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ((μ‘𝑗) · (𝐹‘𝑘)))
54		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → 𝑚 ∈ ℕ)
55	46	adantrr 716	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ (𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)})) → (μ‘𝑗) ∈ ℂ)
56	50	anasss 466	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ (𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)})) → (𝐹‘𝑘) ∈ ℂ)
57	55, 56	mulcld 11264	. . . . 5 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ (𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)})) → ((μ‘𝑗) · (𝐹‘𝑘)) ∈ ℂ)
58	54, 57	fsumdvdsdiag 27115	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑗)} ((μ‘𝑗) · (𝐹‘𝑘)) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ((μ‘𝑗) · (𝐹‘𝑘)))
59		ssrab2 4075	. . . . . . . . . 10 ⊢ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ⊆ ℕ
60		dvdsdivcl 16292	. . . . . . . . . . 11 ⊢ ((𝑚 ∈ ℕ ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑚 / 𝑘) ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚})
61	60	adantll 713	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑚 / 𝑘) ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚})
62	59, 61	sselid 3978	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑚 / 𝑘) ∈ ℕ)
63		musum 27122	. . . . . . . . 9 ⊢ ((𝑚 / 𝑘) ∈ ℕ → Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} (μ‘𝑗) = if((𝑚 / 𝑘) = 1, 1, 0))
64	62, 63	syl 17	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} (μ‘𝑗) = if((𝑚 / 𝑘) = 1, 1, 0))
65	64	oveq1d 7435	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} (μ‘𝑗) · (𝐹‘𝑘)) = (if((𝑚 / 𝑘) = 1, 1, 0) · (𝐹‘𝑘)))
66		fzfid 13970	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (1...(𝑚 / 𝑘)) ∈ Fin)
67		dvdsssfz1 16294	. . . . . . . . . 10 ⊢ ((𝑚 / 𝑘) ∈ ℕ → {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ⊆ (1...(𝑚 / 𝑘)))
68	62, 67	syl 17	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ⊆ (1...(𝑚 / 𝑘)))
69	66, 68	ssfid 9291	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ∈ Fin)
70	1	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → 𝐹:ℕ⟶ℂ)
71		elrabi 3676	. . . . . . . . 9 ⊢ (𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} → 𝑘 ∈ ℕ)
72	70, 71, 49	syl2an 595	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝐹‘𝑘) ∈ ℂ)
73		ssrab2 4075	. . . . . . . . . . 11 ⊢ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ⊆ ℕ
74		simpr 484	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)}) → 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)})
75	73, 74	sselid 3978	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)}) → 𝑗 ∈ ℕ)
76	75, 44	syl 17	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)}) → (μ‘𝑗) ∈ ℤ)
77	76	zcnd 12697	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) ∧ 𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)}) → (μ‘𝑗) ∈ ℂ)
78	69, 72, 77	fsummulc1 15763	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} (μ‘𝑗) · (𝐹‘𝑘)) = Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ((μ‘𝑗) · (𝐹‘𝑘)))
79		ovif 7518	. . . . . . . 8 ⊢ (if((𝑚 / 𝑘) = 1, 1, 0) · (𝐹‘𝑘)) = if((𝑚 / 𝑘) = 1, (1 · (𝐹‘𝑘)), (0 · (𝐹‘𝑘)))
80		nncn 12250	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ ℕ → 𝑚 ∈ ℂ)
81	80	ad2antlr 726	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑚 ∈ ℂ)
82	71	adantl 481	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑘 ∈ ℕ)
83	82	nncnd 12258	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑘 ∈ ℂ)
84		1cnd 11239	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 1 ∈ ℂ)
85	82	nnne0d 12292	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → 𝑘 ≠ 0)
86	81, 83, 84, 85	divmuld 12042	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((𝑚 / 𝑘) = 1 ↔ (𝑘 · 1) = 𝑚))
87	83	mulridd 11261	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (𝑘 · 1) = 𝑘)
88	87	eqeq1d 2730	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((𝑘 · 1) = 𝑚 ↔ 𝑘 = 𝑚))
89	86, 88	bitrd 279	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → ((𝑚 / 𝑘) = 1 ↔ 𝑘 = 𝑚))
90	72	mullidd 11262	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (1 · (𝐹‘𝑘)) = (𝐹‘𝑘))
91	72	mul02d 11442	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (0 · (𝐹‘𝑘)) = 0)
92	89, 90, 91	ifbieq12d 4557	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → if((𝑚 / 𝑘) = 1, (1 · (𝐹‘𝑘)), (0 · (𝐹‘𝑘))) = if(𝑘 = 𝑚, (𝐹‘𝑘), 0))
93	79, 92	eqtrid 2780	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → (if((𝑚 / 𝑘) = 1, 1, 0) · (𝐹‘𝑘)) = if(𝑘 = 𝑚, (𝐹‘𝑘), 0))
94	65, 78, 93	3eqtr3d 2776	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}) → Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ((μ‘𝑗) · (𝐹‘𝑘)) = if(𝑘 = 𝑚, (𝐹‘𝑘), 0))
95	94	sumeq2dv 15681	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ((μ‘𝑗) · (𝐹‘𝑘)) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}if(𝑘 = 𝑚, (𝐹‘𝑘), 0))
96		breq1 5151	. . . . . . . 8 ⊢ (𝑥 = 𝑚 → (𝑥 ∥ 𝑚 ↔ 𝑚 ∥ 𝑚))
97	54	nnzd 12615	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → 𝑚 ∈ ℤ)
98		iddvds 16246	. . . . . . . . 9 ⊢ (𝑚 ∈ ℤ → 𝑚 ∥ 𝑚)
99	97, 98	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → 𝑚 ∥ 𝑚)
100	96, 54, 99	elrabd 3684	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → 𝑚 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚})
101	100	snssd 4813	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → {𝑚} ⊆ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚})
102	101	sselda 3980	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑚}) → 𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚})
103	102, 72	syldan 590	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑚}) → (𝐹‘𝑘) ∈ ℂ)
104		0cn 11236	. . . . . . 7 ⊢ 0 ∈ ℂ
105		ifcl 4574	. . . . . . 7 ⊢ (((𝐹‘𝑘) ∈ ℂ ∧ 0 ∈ ℂ) → if(𝑘 = 𝑚, (𝐹‘𝑘), 0) ∈ ℂ)
106	103, 104, 105	sylancl 585	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ {𝑚}) → if(𝑘 = 𝑚, (𝐹‘𝑘), 0) ∈ ℂ)
107		eldifsni 4794	. . . . . . . . 9 ⊢ (𝑘 ∈ ({𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∖ {𝑚}) → 𝑘 ≠ 𝑚)
108	107	adantl 481	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ ({𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∖ {𝑚})) → 𝑘 ≠ 𝑚)
109	108	neneqd 2942	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ ({𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∖ {𝑚})) → ¬ 𝑘 = 𝑚)
110	109	iffalsed 4540	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ ℕ) ∧ 𝑘 ∈ ({𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∖ {𝑚})) → if(𝑘 = 𝑚, (𝐹‘𝑘), 0) = 0)
111		fzfid 13970	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (1...𝑚) ∈ Fin)
112		dvdsssfz1 16294	. . . . . . . 8 ⊢ (𝑚 ∈ ℕ → {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ⊆ (1...𝑚))
113	112	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ⊆ (1...𝑚))
114	111, 113	ssfid 9291	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ∈ Fin)
115	101, 106, 110, 114	fsumss 15703	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑘 ∈ {𝑚}if(𝑘 = 𝑚, (𝐹‘𝑘), 0) = Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}if(𝑘 = 𝑚, (𝐹‘𝑘), 0))
116	1	ffvelcdmda 7094	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → (𝐹‘𝑚) ∈ ℂ)
117		iftrue 4535	. . . . . . . 8 ⊢ (𝑘 = 𝑚 → if(𝑘 = 𝑚, (𝐹‘𝑘), 0) = (𝐹‘𝑘))
118		fveq2 6897	. . . . . . . 8 ⊢ (𝑘 = 𝑚 → (𝐹‘𝑘) = (𝐹‘𝑚))
119	117, 118	eqtrd 2768	. . . . . . 7 ⊢ (𝑘 = 𝑚 → if(𝑘 = 𝑚, (𝐹‘𝑘), 0) = (𝐹‘𝑚))
120	119	sumsn 15724	. . . . . 6 ⊢ ((𝑚 ∈ ℕ ∧ (𝐹‘𝑚) ∈ ℂ) → Σ𝑘 ∈ {𝑚}if(𝑘 = 𝑚, (𝐹‘𝑘), 0) = (𝐹‘𝑚))
121	54, 116, 120	syl2anc 583	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑘 ∈ {𝑚}if(𝑘 = 𝑚, (𝐹‘𝑘), 0) = (𝐹‘𝑚))
122	95, 115, 121	3eqtr2d 2774	. . . 4 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑘 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚}Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ (𝑚 / 𝑘)} ((μ‘𝑗) · (𝐹‘𝑘)) = (𝐹‘𝑚))
123	53, 58, 122	3eqtrd 2772	. . 3 ⊢ ((𝜑 ∧ 𝑚 ∈ ℕ) → Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗))) = (𝐹‘𝑚))
124	123	mpteq2dva 5248	. 2 ⊢ (𝜑 → (𝑚 ∈ ℕ ↦ Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗)))) = (𝑚 ∈ ℕ ↦ (𝐹‘𝑚)))
125	2, 124	eqtr4d 2771	1 ⊢ (𝜑 → 𝐹 = (𝑚 ∈ ℕ ↦ Σ𝑗 ∈ {𝑥 ∈ ℕ ∣ 𝑥 ∥ 𝑚} ((μ‘𝑗) · (𝐺‘(𝑚 / 𝑗)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ≠ wne 2937 {crab 3429 ∖ cdif 3944 ⊆ wss 3947 ifcif 4529 {csn 4629 class class class wbr 5148 ↦ cmpt 5231 ⟶wf 6544 ‘cfv 6548 (class class class)co 7420 ℂcc 11136 ℝcr 11137 0cc0 11138 1c1 11139 · cmul 11143 < clt 11278 / cdiv 11901 ℕcn 12242 ℤcz 12588 ...cfz 13516 Σcsu 15664 ∥ cdvds 16230 μcmu 27026

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-inf2 9664 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3373 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-int 4950 df-iun 4998 df-disj 5114 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-se 5634 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-isom 6557 df-riota 7376 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7871 df-1st 7993 df-2nd 7994 df-frecs 8286 df-wrecs 8317 df-recs 8391 df-rdg 8430 df-1o 8486 df-2o 8487 df-oadd 8490 df-er 8724 df-map 8846 df-en 8964 df-dom 8965 df-sdom 8966 df-fin 8967 df-sup 9465 df-inf 9466 df-oi 9533 df-dju 9924 df-card 9962 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-div 11902 df-nn 12243 df-2 12305 df-3 12306 df-n0 12503 df-xnn0 12575 df-z 12589 df-uz 12853 df-q 12963 df-rp 13007 df-fz 13517 df-fzo 13660 df-fl 13789 df-mod 13867 df-seq 13999 df-exp 14059 df-fac 14265 df-bc 14294 df-hash 14322 df-cj 15078 df-re 15079 df-im 15080 df-sqrt 15214 df-abs 15215 df-clim 15464 df-sum 15665 df-dvds 16231 df-gcd 16469 df-prm 16642 df-pc 16805 df-mu 27032

This theorem is referenced by: dchrvmasumlem1 27427 logsqvma2 27475

W3C validator