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Theorem mumul 26682

Description: The Möbius function is a multiplicative function. This is one of the primary interests of the Möbius function as an arithmetic function. (Contributed by Mario Carneiro, 3-Oct-2014.)

**Assertion**
Ref	Expression
mumul	⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))

Proof of Theorem mumul Dummy variable 𝑝 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpl2 1192	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → 𝐵 ∈ ℕ)
2		mucl 26642	. . . . . 6 ⊢ (𝐵 ∈ ℕ → (μ‘𝐵) ∈ ℤ)
3	1, 2	syl 17	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘𝐵) ∈ ℤ)
4	3	zcnd 12666	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘𝐵) ∈ ℂ)
5	4	mul02d 11411	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (0 · (μ‘𝐵)) = 0)
6		simpr 485	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘𝐴) = 0)
7	6	oveq1d 7423	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → ((μ‘𝐴) · (μ‘𝐵)) = (0 · (μ‘𝐵)))
8		mumullem1 26680	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐴) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
9	8	3adantl3 1168	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
10	5, 7, 9	3eqtr4rd 2783	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))
11		simpl1 1191	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → 𝐴 ∈ ℕ)
12		mucl 26642	. . . . . 6 ⊢ (𝐴 ∈ ℕ → (μ‘𝐴) ∈ ℤ)
13	11, 12	syl 17	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘𝐴) ∈ ℤ)
14	13	zcnd 12666	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘𝐴) ∈ ℂ)
15	14	mul01d 11412	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → ((μ‘𝐴) · 0) = 0)
16		simpr 485	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘𝐵) = 0)
17	16	oveq2d 7424	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → ((μ‘𝐴) · (μ‘𝐵)) = ((μ‘𝐴) · 0))
18		nncn 12219	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ)
19		nncn 12219	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℂ)
20		mulcom 11195	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴))
21	18, 19, 20	syl2an 596	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 · 𝐵) = (𝐵 · 𝐴))
22	21	fveq2d 6895	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (μ‘(𝐴 · 𝐵)) = (μ‘(𝐵 · 𝐴)))
23	22	adantr 481	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = (μ‘(𝐵 · 𝐴)))
24		mumullem1 26680	. . . . . 6 ⊢ (((𝐵 ∈ ℕ ∧ 𝐴 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐵 · 𝐴)) = 0)
25	24	ancom1s 651	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐵 · 𝐴)) = 0)
26	23, 25	eqtrd 2772	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
27	26	3adantl3 1168	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
28	15, 17, 27	3eqtr4rd 2783	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))
29		simpl1 1191	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → 𝐴 ∈ ℕ)
30		simpl2 1192	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → 𝐵 ∈ ℕ)
31	29, 30	nnmulcld 12264	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (𝐴 · 𝐵) ∈ ℕ)
32		mumullem2 26681	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘(𝐴 · 𝐵)) ≠ 0)
33		muval2 26635	. . . 4 ⊢ (((𝐴 · 𝐵) ∈ ℕ ∧ (μ‘(𝐴 · 𝐵)) ≠ 0) → (μ‘(𝐴 · 𝐵)) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)})))
34	31, 32, 33	syl2anc 584	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘(𝐴 · 𝐵)) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)})))
35		neg1cn 12325	. . . . . 6 ⊢ -1 ∈ ℂ
36	35	a1i 11	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → -1 ∈ ℂ)
37		fzfi 13936	. . . . . . 7 ⊢ (1...𝐵) ∈ Fin
38		prmssnn 16612	. . . . . . . . 9 ⊢ ℙ ⊆ ℕ
39		rabss2 4075	. . . . . . . . 9 ⊢ (ℙ ⊆ ℕ → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ⊆ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵})
40	38, 39	ax-mp 5	. . . . . . . 8 ⊢ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ⊆ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵}
41		dvdsssfz1 16260	. . . . . . . . 9 ⊢ (𝐵 ∈ ℕ → {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵} ⊆ (1...𝐵))
42	30, 41	syl 17	. . . . . . . 8 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐵} ⊆ (1...𝐵))
43	40, 42	sstrid 3993	. . . . . . 7 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ⊆ (1...𝐵))
44		ssfi 9172	. . . . . . 7 ⊢ (((1...𝐵) ∈ Fin ∧ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ⊆ (1...𝐵)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ∈ Fin)
45	37, 43, 44	sylancr 587	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ∈ Fin)
46		hashcl 14315	. . . . . 6 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ∈ Fin → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) ∈ ℕ₀)
47	45, 46	syl 17	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) ∈ ℕ₀)
48		fzfi 13936	. . . . . . 7 ⊢ (1...𝐴) ∈ Fin
49		rabss2 4075	. . . . . . . . 9 ⊢ (ℙ ⊆ ℕ → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ⊆ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐴})
50	38, 49	ax-mp 5	. . . . . . . 8 ⊢ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ⊆ {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐴}
51		dvdsssfz1 16260	. . . . . . . . 9 ⊢ (𝐴 ∈ ℕ → {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐴} ⊆ (1...𝐴))
52	29, 51	syl 17	. . . . . . . 8 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℕ ∣ 𝑝 ∥ 𝐴} ⊆ (1...𝐴))
53	50, 52	sstrid 3993	. . . . . . 7 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ⊆ (1...𝐴))
54		ssfi 9172	. . . . . . 7 ⊢ (((1...𝐴) ∈ Fin ∧ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ⊆ (1...𝐴)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin)
55	48, 53, 54	sylancr 587	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin)
56		hashcl 14315	. . . . . 6 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℕ₀)
57	55, 56	syl 17	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) ∈ ℕ₀)
58	36, 47, 57	expaddd 14112	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (-1↑((♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) + (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}))) = ((-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) · (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}))))
59		simpr 485	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → 𝑝 ∈ ℙ)
60		simpl1 1191	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℕ)
61	60	nnzd 12584	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℤ)
62	61	adantlr 713	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℤ)
63		simpl2 1192	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐵 ∈ ℕ)
64	63	nnzd 12584	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐵 ∈ ℤ)
65	64	adantlr 713	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → 𝐵 ∈ ℤ)
66		euclemma 16649	. . . . . . . . . 10 ⊢ ((𝑝 ∈ ℙ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → (𝑝 ∥ (𝐴 · 𝐵) ↔ (𝑝 ∥ 𝐴 ∨ 𝑝 ∥ 𝐵)))
67	59, 62, 65, 66	syl3anc 1371	. . . . . . . . 9 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → (𝑝 ∥ (𝐴 · 𝐵) ↔ (𝑝 ∥ 𝐴 ∨ 𝑝 ∥ 𝐵)))
68	67	rabbidva 3439	. . . . . . . 8 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)} = {𝑝 ∈ ℙ ∣ (𝑝 ∥ 𝐴 ∨ 𝑝 ∥ 𝐵)})
69		unrab 4305	. . . . . . . 8 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∪ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) = {𝑝 ∈ ℙ ∣ (𝑝 ∥ 𝐴 ∨ 𝑝 ∥ 𝐵)}
70	68, 69	eqtr4di 2790	. . . . . . 7 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)} = ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∪ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}))
71	70	fveq2d 6895	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)}) = (♯‘({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∪ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
72		inrab 4306	. . . . . . . 8 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∩ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) = {𝑝 ∈ ℙ ∣ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵)}
73		nprmdvds1 16642	. . . . . . . . . . . 12 ⊢ (𝑝 ∈ ℙ → ¬ 𝑝 ∥ 1)
74	73	adantl 482	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → ¬ 𝑝 ∥ 1)
75		prmz 16611	. . . . . . . . . . . . . 14 ⊢ (𝑝 ∈ ℙ → 𝑝 ∈ ℤ)
76	75	adantl 482	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → 𝑝 ∈ ℤ)
77		dvdsgcd 16485	. . . . . . . . . . . . 13 ⊢ ((𝑝 ∈ ℤ ∧ 𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → ((𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵) → 𝑝 ∥ (𝐴 gcd 𝐵)))
78	76, 62, 65, 77	syl3anc 1371	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → ((𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵) → 𝑝 ∥ (𝐴 gcd 𝐵)))
79		simpll3 1214	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → (𝐴 gcd 𝐵) = 1)
80	79	breq2d 5160	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → (𝑝 ∥ (𝐴 gcd 𝐵) ↔ 𝑝 ∥ 1))
81	78, 80	sylibd 238	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → ((𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵) → 𝑝 ∥ 1))
82	74, 81	mtod 197	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → ¬ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵))
83	82	ralrimiva 3146	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → ∀𝑝 ∈ ℙ ¬ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵))
84		rabeq0 4384	. . . . . . . . 9 ⊢ ({𝑝 ∈ ℙ ∣ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵)} = ∅ ↔ ∀𝑝 ∈ ℙ ¬ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵))
85	83, 84	sylibr 233	. . . . . . . 8 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵)} = ∅)
86	72, 85	eqtrid 2784	. . . . . . 7 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∩ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) = ∅)
87		hashun 14341	. . . . . . 7 ⊢ (({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin ∧ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ∈ Fin ∧ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∩ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) = ∅) → (♯‘({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∪ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})) = ((♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) + (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
88	55, 45, 86, 87	syl3anc 1371	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (♯‘({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∪ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})) = ((♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) + (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
89	71, 88	eqtrd 2772	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)}) = ((♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) + (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
90	89	oveq2d 7424	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)})) = (-1↑((♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴}) + (♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}))))
91		simprl 769	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐴) ≠ 0)
92		muval2 26635	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ (μ‘𝐴) ≠ 0) → (μ‘𝐴) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))
93	29, 91, 92	syl2anc 584	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐴) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))
94		simprr 771	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐵) ≠ 0)
95		muval2 26635	. . . . . 6 ⊢ ((𝐵 ∈ ℕ ∧ (μ‘𝐵) ≠ 0) → (μ‘𝐵) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
96	30, 94, 95	syl2anc 584	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐵) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
97	93, 96	oveq12d 7426	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → ((μ‘𝐴) · (μ‘𝐵)) = ((-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})) · (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}))))
98	58, 90, 97	3eqtr4rd 2783	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → ((μ‘𝐴) · (μ‘𝐵)) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)})))
99	34, 98	eqtr4d 2775	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))
100	10, 28, 99	pm2.61da2ne 3030	1 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∨ wo 845 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 {crab 3432 ∪ cun 3946 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 class class class wbr 5148 ‘cfv 6543 (class class class)co 7408 Fincfn 8938 ℂcc 11107 0cc0 11109 1c1 11110 + caddc 11112 · cmul 11114 -cneg 11444 ℕcn 12211 ℕ₀cn0 12471 ℤcz 12557 ...cfz 13483 ↑cexp 14026 ♯chash 14289 ∥ cdvds 16196 gcd cgcd 16434 ℙcprime 16607 μcmu 26596

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-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187

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 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7855 df-1st 7974 df-2nd 7975 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-2o 8466 df-oadd 8469 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-sup 9436 df-inf 9437 df-dju 9895 df-card 9933 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-div 11871 df-nn 12212 df-2 12274 df-3 12275 df-n0 12472 df-z 12558 df-uz 12822 df-q 12932 df-rp 12974 df-fz 13484 df-fl 13756 df-mod 13834 df-seq 13966 df-exp 14027 df-hash 14290 df-cj 15045 df-re 15046 df-im 15047 df-sqrt 15181 df-abs 15182 df-dvds 16197 df-gcd 16435 df-prm 16608 df-pc 16769 df-mu 26602

This theorem is referenced by: (None)

W3C validator