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Theorem mumul 27032

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 1189	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → 𝐵 ∈ ℕ)
2		mucl 26992	. . . . . 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 12665	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘𝐵) ∈ ℂ)
5	4	mul02d 11410	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (0 · (μ‘𝐵)) = 0)
6		simpr 484	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘𝐴) = 0)
7	6	oveq1d 7417	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → ((μ‘𝐴) · (μ‘𝐵)) = (0 · (μ‘𝐵)))
8		mumullem1 27030	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐴) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
9	8	3adantl3 1165	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
10	5, 7, 9	3eqtr4rd 2775	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐴) = 0) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))
11		simpl1 1188	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → 𝐴 ∈ ℕ)
12		mucl 26992	. . . . . 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 12665	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘𝐴) ∈ ℂ)
15	14	mul01d 11411	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → ((μ‘𝐴) · 0) = 0)
16		simpr 484	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘𝐵) = 0)
17	16	oveq2d 7418	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → ((μ‘𝐴) · (μ‘𝐵)) = ((μ‘𝐴) · 0))
18		nncn 12218	. . . . . . . 8 ⊢ (𝐴 ∈ ℕ → 𝐴 ∈ ℂ)
19		nncn 12218	. . . . . . . 8 ⊢ (𝐵 ∈ ℕ → 𝐵 ∈ ℂ)
20		mulcom 11193	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) = (𝐵 · 𝐴))
21	18, 19, 20	syl2an 595	. . . . . . 7 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (𝐴 · 𝐵) = (𝐵 · 𝐴))
22	21	fveq2d 6886	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) → (μ‘(𝐴 · 𝐵)) = (μ‘(𝐵 · 𝐴)))
23	22	adantr 480	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = (μ‘(𝐵 · 𝐴)))
24		mumullem1 27030	. . . . . 6 ⊢ (((𝐵 ∈ ℕ ∧ 𝐴 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐵 · 𝐴)) = 0)
25	24	ancom1s 650	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐵 · 𝐴)) = 0)
26	23, 25	eqtrd 2764	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
27	26	3adantl3 1165	. . 3 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = 0)
28	15, 17, 27	3eqtr4rd 2775	. 2 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ (μ‘𝐵) = 0) → (μ‘(𝐴 · 𝐵)) = ((μ‘𝐴) · (μ‘𝐵)))
29		simpl1 1188	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → 𝐴 ∈ ℕ)
30		simpl2 1189	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → 𝐵 ∈ ℕ)
31	29, 30	nnmulcld 12263	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (𝐴 · 𝐵) ∈ ℕ)
32		mumullem2 27031	. . . 4 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘(𝐴 · 𝐵)) ≠ 0)
33		muval2 26985	. . . 4 ⊢ (((𝐴 · 𝐵) ∈ ℕ ∧ (μ‘(𝐴 · 𝐵)) ≠ 0) → (μ‘(𝐴 · 𝐵)) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ (𝐴 · 𝐵)})))
34	31, 32, 33	syl2anc 583	. . 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 12324	. . . . . 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 13935	. . . . . . 7 ⊢ (1...𝐵) ∈ Fin
38		prmssnn 16612	. . . . . . . . 9 ⊢ ℙ ⊆ ℕ
39		rabss2 4068	. . . . . . . . 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 3986	. . . . . . 7 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ⊆ (1...𝐵))
44		ssfi 9170	. . . . . . 7 ⊢ (((1...𝐵) ∈ Fin ∧ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ⊆ (1...𝐵)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ∈ Fin)
45	37, 43, 44	sylancr 586	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵} ∈ Fin)
46		hashcl 14314	. . . . . 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 13935	. . . . . . 7 ⊢ (1...𝐴) ∈ Fin
49		rabss2 4068	. . . . . . . . 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 3986	. . . . . . 7 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ⊆ (1...𝐴))
54		ssfi 9170	. . . . . . 7 ⊢ (((1...𝐴) ∈ Fin ∧ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ⊆ (1...𝐴)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin)
55	48, 53, 54	sylancr 586	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∈ Fin)
56		hashcl 14314	. . . . . 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 14111	. . . 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 484	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → 𝑝 ∈ ℙ)
60		simpl1 1188	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℕ)
61	60	nnzd 12583	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℤ)
62	61	adantlr 712	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → 𝐴 ∈ ℤ)
63		simpl2 1189	. . . . . . . . . . . 12 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐵 ∈ ℕ)
64	63	nnzd 12583	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ 𝑝 ∈ ℙ) → 𝐵 ∈ ℤ)
65	64	adantlr 712	. . . . . . . . . 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 1368	. . . . . . . . 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 3431	. . . . . . . 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 4298	. . . . . . . 8 ⊢ ({𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴} ∪ {𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵}) = {𝑝 ∈ ℙ ∣ (𝑝 ∥ 𝐴 ∨ 𝑝 ∥ 𝐵)}
70	68, 69	eqtr4di 2782	. . . . . . 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 6886	. . . . . 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 4299	. . . . . . . 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 481	. . . . . . . . . . 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 481	. . . . . . . . . . . . 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 1368	. . . . . . . . . . . 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 1211	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) ∧ 𝑝 ∈ ℙ) → (𝐴 gcd 𝐵) = 1)
80	79	breq2d 5151	. . . . . . . . . . . 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 3138	. . . . . . . . 9 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → ∀𝑝 ∈ ℙ ¬ (𝑝 ∥ 𝐴 ∧ 𝑝 ∥ 𝐵))
84		rabeq0 4377	. . . . . . . . 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 2776	. . . . . . 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 14340	. . . . . . 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 1368	. . . . . 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 2764	. . . . 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 7418	. . . 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 768	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐴) ≠ 0)
92		muval2 26985	. . . . . 6 ⊢ ((𝐴 ∈ ℕ ∧ (μ‘𝐴) ≠ 0) → (μ‘𝐴) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))
93	29, 91, 92	syl2anc 583	. . . . 5 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐴) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐴})))
94		simprr 770	. . . . . 6 ⊢ (((𝐴 ∈ ℕ ∧ 𝐵 ∈ ℕ ∧ (𝐴 gcd 𝐵) = 1) ∧ ((μ‘𝐴) ≠ 0 ∧ (μ‘𝐵) ≠ 0)) → (μ‘𝐵) ≠ 0)
95		muval2 26985	. . . . . 6 ⊢ ((𝐵 ∈ ℕ ∧ (μ‘𝐵) ≠ 0) → (μ‘𝐵) = (-1↑(♯‘{𝑝 ∈ ℙ ∣ 𝑝 ∥ 𝐵})))
96	30, 94, 95	syl2anc 583	. . . . 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 7420	. . . 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 2775	. . 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 2767	. 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 3022	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 395 ∨ wo 844 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2932 ∀wral 3053 {crab 3424 ∪ cun 3939 ∩ cin 3940 ⊆ wss 3941 ∅c0 4315 class class class wbr 5139 ‘cfv 6534 (class class class)co 7402 Fincfn 8936 ℂcc 11105 0cc0 11107 1c1 11108 + caddc 11110 · cmul 11112 -cneg 11443 ℕcn 12210 ℕ₀cn0 12470 ℤcz 12556 ...cfz 13482 ↑cexp 14025 ♯chash 14288 ∥ cdvds 16196 gcd cgcd 16434 ℙcprime 16607 μcmu 26946

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2695 ax-sep 5290 ax-nul 5297 ax-pow 5354 ax-pr 5418 ax-un 7719 ax-cnex 11163 ax-resscn 11164 ax-1cn 11165 ax-icn 11166 ax-addcl 11167 ax-addrcl 11168 ax-mulcl 11169 ax-mulrcl 11170 ax-mulcom 11171 ax-addass 11172 ax-mulass 11173 ax-distr 11174 ax-i2m1 11175 ax-1ne0 11176 ax-1rid 11177 ax-rnegex 11178 ax-rrecex 11179 ax-cnre 11180 ax-pre-lttri 11181 ax-pre-lttrn 11182 ax-pre-ltadd 11183 ax-pre-mulgt0 11184 ax-pre-sup 11185

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2526 df-eu 2555 df-clab 2702 df-cleq 2716 df-clel 2802 df-nfc 2877 df-ne 2933 df-nel 3039 df-ral 3054 df-rex 3063 df-rmo 3368 df-reu 3369 df-rab 3425 df-v 3468 df-sbc 3771 df-csb 3887 df-dif 3944 df-un 3946 df-in 3948 df-ss 3958 df-pss 3960 df-nul 4316 df-if 4522 df-pw 4597 df-sn 4622 df-pr 4624 df-op 4628 df-uni 4901 df-int 4942 df-iun 4990 df-br 5140 df-opab 5202 df-mpt 5223 df-tr 5257 df-id 5565 df-eprel 5571 df-po 5579 df-so 5580 df-fr 5622 df-we 5624 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6291 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6486 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-riota 7358 df-ov 7405 df-oprab 7406 df-mpo 7407 df-om 7850 df-1st 7969 df-2nd 7970 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-oadd 8466 df-er 8700 df-en 8937 df-dom 8938 df-sdom 8939 df-fin 8940 df-sup 9434 df-inf 9435 df-dju 9893 df-card 9931 df-pnf 11248 df-mnf 11249 df-xr 11250 df-ltxr 11251 df-le 11252 df-sub 11444 df-neg 11445 df-div 11870 df-nn 12211 df-2 12273 df-3 12274 df-n0 12471 df-z 12557 df-uz 12821 df-q 12931 df-rp 12973 df-fz 13483 df-fl 13755 df-mod 13833 df-seq 13965 df-exp 14026 df-hash 14289 df-cj 15044 df-re 15045 df-im 15046 df-sqrt 15180 df-abs 15181 df-dvds 16197 df-gcd 16435 df-prm 16608 df-pc 16771 df-mu 26952

This theorem is referenced by: (None)

W3C validator