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Theorem odadd2 19677

Description: The order of a product in an abelian group is divisible by the LCM of the orders of the factors divided by the GCD. (Contributed by Mario Carneiro, 20-Oct-2015.)

**Hypotheses**
Ref	Expression
odadd1.1	⊢ 𝑂 = (od‘𝐺)
odadd1.2	⊢ 𝑋 = (Base‘𝐺)
odadd1.3	⊢ + = (+_g‘𝐺)

**Assertion**
Ref	Expression
odadd2	⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)))

**Proof of Theorem odadd2**
Step	Hyp	Ref	Expression
1		odadd1.2	. . . . . . . . 9 ⊢ 𝑋 = (Base‘𝐺)
2		odadd1.1	. . . . . . . . 9 ⊢ 𝑂 = (od‘𝐺)
3	1, 2	odcl 19368	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑋 → (𝑂‘𝐴) ∈ ℕ₀)
4	3	3ad2ant2 1134	. . . . . . 7 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑂‘𝐴) ∈ ℕ₀)
5	4	nn0zd 12566	. . . . . 6 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑂‘𝐴) ∈ ℤ)
6	1, 2	odcl 19368	. . . . . . . 8 ⊢ (𝐵 ∈ 𝑋 → (𝑂‘𝐵) ∈ ℕ₀)
7	6	3ad2ant3 1135	. . . . . . 7 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑂‘𝐵) ∈ ℕ₀)
8	7	nn0zd 12566	. . . . . 6 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑂‘𝐵) ∈ ℤ)
9	5, 8	zmulcld 12654	. . . . 5 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∈ ℤ)
10	9	adantr 481	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∈ ℤ)
11		dvds0 16197	. . . 4 ⊢ (((𝑂‘𝐴) · (𝑂‘𝐵)) ∈ ℤ → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∥ 0)
12	10, 11	syl 17	. . 3 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∥ 0)
13		simpr 485	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0)
14	13	sq0id 14140	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2) = 0)
15	14	oveq2d 7409	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) = ((𝑂‘(𝐴 + 𝐵)) · 0))
16		ablgrp 19617	. . . . . . . . . 10 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp)
17		odadd1.3	. . . . . . . . . . 11 ⊢ + = (+_g‘𝐺)
18	1, 17	grpcl 18802	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 + 𝐵) ∈ 𝑋)
19	16, 18	syl3an1 1163	. . . . . . . . 9 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 + 𝐵) ∈ 𝑋)
20	1, 2	odcl 19368	. . . . . . . . 9 ⊢ ((𝐴 + 𝐵) ∈ 𝑋 → (𝑂‘(𝐴 + 𝐵)) ∈ ℕ₀)
21	19, 20	syl 17	. . . . . . . 8 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑂‘(𝐴 + 𝐵)) ∈ ℕ₀)
22	21	nn0zd 12566	. . . . . . 7 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝑂‘(𝐴 + 𝐵)) ∈ ℤ)
23	22	adantr 481	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → (𝑂‘(𝐴 + 𝐵)) ∈ ℤ)
24	23	zcnd 12649	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → (𝑂‘(𝐴 + 𝐵)) ∈ ℂ)
25	24	mul01d 11395	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘(𝐴 + 𝐵)) · 0) = 0)
26	15, 25	eqtrd 2771	. . 3 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) = 0)
27	12, 26	breqtrrd 5169	. 2 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) = 0) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)))
28	5	adantr 481	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐴) ∈ ℤ)
29	8	adantr 481	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐵) ∈ ℤ)
30	28, 29	gcdcld 16431	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℕ₀)
31	30	nn0cnd 12516	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℂ)
32	31	sqvald 14090	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2) = (((𝑂‘𝐴) gcd (𝑂‘𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
33	32	oveq2d 7409	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) = ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))))
34		gcddvds 16426	. . . . . . . . 9 ⊢ (((𝑂‘𝐴) ∈ ℤ ∧ (𝑂‘𝐵) ∈ ℤ) → (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐴) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐵)))
35	28, 29, 34	syl2anc 584	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐴) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐵)))
36	35	simpld 495	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐴))
37	30	nn0zd 12566	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℤ)
38		simpr 485	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0)
39		dvdsval2 16182	. . . . . . . 8 ⊢ ((((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℤ ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0 ∧ (𝑂‘𝐴) ∈ ℤ) → (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐴) ↔ ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ))
40	37, 38, 28, 39	syl3anc 1371	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐴) ↔ ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ))
41	36, 40	mpbid 231	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ)
42	41	zcnd 12649	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℂ)
43	35	simprd 496	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐵))
44		dvdsval2 16182	. . . . . . . 8 ⊢ ((((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℤ ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0 ∧ (𝑂‘𝐵) ∈ ℤ) → (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐵) ↔ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ))
45	37, 38, 29, 44	syl3anc 1371	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∥ (𝑂‘𝐵) ↔ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ))
46	43, 45	mpbid 231	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ)
47	46	zcnd 12649	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℂ)
48	42, 31, 47, 31	mul4d 11408	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))))
49	28	zcnd 12649	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐴) ∈ ℂ)
50	49, 31, 38	divcan1d 11973	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) = (𝑂‘𝐴))
51	29	zcnd 12649	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐵) ∈ ℂ)
52	51, 31, 38	divcan1d 11973	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) = (𝑂‘𝐵))
53	50, 52	oveq12d 7411	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = ((𝑂‘𝐴) · (𝑂‘𝐵)))
54	33, 48, 53	3eqtr2d 2777	. . 3 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) = ((𝑂‘𝐴) · (𝑂‘𝐵)))
55	22	adantr 481	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘(𝐴 + 𝐵)) ∈ ℤ)
56		dvdsmul2 16204	. . . . . . . . . 10 ⊢ (((𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (𝑂‘𝐴) ∈ ℤ) → (𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)))
57	55, 28, 56	syl2anc 584	. . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)))
58		simpl1 1191	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → 𝐺 ∈ Abel)
59	55, 29	zmulcld 12654	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ)
60		simpl2 1192	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → 𝐴 ∈ 𝑋)
61		simpl3 1193	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → 𝐵 ∈ 𝑋)
62		eqid 2731	. . . . . . . . . . . . . 14 ⊢ (._g‘𝐺) = (._g‘𝐺)
63	1, 62, 17	mulgdi 19655	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ Abel ∧ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)(𝐴 + 𝐵)) = ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐵)))
64	58, 59, 60, 61, 63	syl13anc 1372	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)(𝐴 + 𝐵)) = ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐵)))
65		dvdsmul2 16204	. . . . . . . . . . . . . . 15 ⊢ (((𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (𝑂‘𝐵) ∈ ℤ) → (𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))
66	55, 29, 65	syl2anc 584	. . . . . . . . . . . . . 14 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))
67	58, 16	syl 17	. . . . . . . . . . . . . . 15 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → 𝐺 ∈ Grp)
68		eqid 2731	. . . . . . . . . . . . . . . 16 ⊢ (0_g‘𝐺) = (0_g‘𝐺)
69	1, 2, 62, 68	oddvds 19379	. . . . . . . . . . . . . . 15 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ∈ 𝑋 ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ) → ((𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐵) = (0_g‘𝐺)))
70	67, 61, 59, 69	syl3anc 1371	. . . . . . . . . . . . . 14 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐵) = (0_g‘𝐺)))
71	66, 70	mpbid 231	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐵) = (0_g‘𝐺))
72	71	oveq2d 7409	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐵)) = ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (0_g‘𝐺)))
73	64, 72	eqtrd 2771	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)(𝐴 + 𝐵)) = ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (0_g‘𝐺)))
74		dvdsmul1 16203	. . . . . . . . . . . . 13 ⊢ (((𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (𝑂‘𝐵) ∈ ℤ) → (𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))
75	55, 29, 74	syl2anc 584	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))
76	19	adantr 481	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝐴 + 𝐵) ∈ 𝑋)
77	1, 2, 62, 68	oddvds 19379	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ Grp ∧ (𝐴 + 𝐵) ∈ 𝑋 ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ) → ((𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)(𝐴 + 𝐵)) = (0_g‘𝐺)))
78	67, 76, 59, 77	syl3anc 1371	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)(𝐴 + 𝐵)) = (0_g‘𝐺)))
79	75, 78	mpbid 231	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)(𝐴 + 𝐵)) = (0_g‘𝐺))
80	1, 62	mulgcl 18943	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ Grp ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ ∧ 𝐴 ∈ 𝑋) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) ∈ 𝑋)
81	67, 59, 60, 80	syl3anc 1371	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) ∈ 𝑋)
82	1, 17, 68	grprid 18828	. . . . . . . . . . . 12 ⊢ ((𝐺 ∈ Grp ∧ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) ∈ 𝑋) → ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (0_g‘𝐺)) = (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴))
83	67, 81, 82	syl2anc 584	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) + (0_g‘𝐺)) = (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴))
84	73, 79, 83	3eqtr3rd 2780	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) = (0_g‘𝐺))
85	1, 2, 62, 68	oddvds 19379	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ) → ((𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) = (0_g‘𝐺)))
86	67, 60, 59, 85	syl3anc 1371	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))(._g‘𝐺)𝐴) = (0_g‘𝐺)))
87	84, 86	mpbird 256	. . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))
88	55, 28	zmulcld 12654	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ)
89		dvdsgcd 16468	. . . . . . . . . 10 ⊢ (((𝑂‘𝐴) ∈ ℤ ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ) → (((𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∧ (𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))) → (𝑂‘𝐴) ∥ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))))
90	28, 88, 59, 89	syl3anc 1371	. . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∧ (𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))) → (𝑂‘𝐴) ∥ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))))
91	57, 87, 90	mp2and 697	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐴) ∥ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))))
92	21	adantr 481	. . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘(𝐴 + 𝐵)) ∈ ℕ₀)
93		mulgcd 16472	. . . . . . . . 9 ⊢ (((𝑂‘(𝐴 + 𝐵)) ∈ ℕ₀ ∧ (𝑂‘𝐴) ∈ ℤ ∧ (𝑂‘𝐵) ∈ ℤ) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))) = ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
94	92, 28, 29, 93	syl3anc 1371	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))) = ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
95	91, 94	breqtrd 5167	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
96	50, 95	eqbrtrd 5163	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
97		dvdsmulcr 16211	. . . . . . 7 ⊢ ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ ∧ (𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℤ ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0)) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ↔ ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵))))
98	41, 55, 37, 38, 97	syl112anc 1374	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ↔ ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵))))
99	96, 98	mpbid 231	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵)))
100	1, 62, 17	mulgdi 19655	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ Abel ∧ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)(𝐴 + 𝐵)) = ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐴) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)))
101	58, 88, 60, 61, 100	syl13anc 1372	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)(𝐴 + 𝐵)) = ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐴) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)))
102	1, 2, 62, 68	oddvds 19379	. . . . . . . . . . . . . . 15 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ) → ((𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐴) = (0_g‘𝐺)))
103	67, 60, 88, 102	syl3anc 1371	. . . . . . . . . . . . . 14 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐴) = (0_g‘𝐺)))
104	57, 103	mpbid 231	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐴) = (0_g‘𝐺))
105	104	oveq1d 7408	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐴) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)) = ((0_g‘𝐺) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)))
106	101, 105	eqtrd 2771	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)(𝐴 + 𝐵)) = ((0_g‘𝐺) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)))
107		dvdsmul1 16203	. . . . . . . . . . . . 13 ⊢ (((𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (𝑂‘𝐴) ∈ ℤ) → (𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)))
108	55, 28, 107	syl2anc 584	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)))
109	1, 2, 62, 68	oddvds 19379	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ Grp ∧ (𝐴 + 𝐵) ∈ 𝑋 ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ) → ((𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)(𝐴 + 𝐵)) = (0_g‘𝐺)))
110	67, 76, 88, 109	syl3anc 1371	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘(𝐴 + 𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)(𝐴 + 𝐵)) = (0_g‘𝐺)))
111	108, 110	mpbid 231	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)(𝐴 + 𝐵)) = (0_g‘𝐺))
112	1, 62	mulgcl 18943	. . . . . . . . . . . . 13 ⊢ ((𝐺 ∈ Grp ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ ∧ 𝐵 ∈ 𝑋) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵) ∈ 𝑋)
113	67, 88, 61, 112	syl3anc 1371	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵) ∈ 𝑋)
114	1, 17, 68	grplid 18827	. . . . . . . . . . . 12 ⊢ ((𝐺 ∈ Grp ∧ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵) ∈ 𝑋) → ((0_g‘𝐺) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)) = (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵))
115	67, 113, 114	syl2anc 584	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((0_g‘𝐺) + (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵)) = (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵))
116	106, 111, 115	3eqtr3rd 2780	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵) = (0_g‘𝐺))
117	1, 2, 62, 68	oddvds 19379	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ Grp ∧ 𝐵 ∈ 𝑋 ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ) → ((𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵) = (0_g‘𝐺)))
118	67, 61, 88, 117	syl3anc 1371	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ↔ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴))(._g‘𝐺)𝐵) = (0_g‘𝐺)))
119	116, 118	mpbird 256	. . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)))
120		dvdsgcd 16468	. . . . . . . . . 10 ⊢ (((𝑂‘𝐵) ∈ ℤ ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∈ ℤ ∧ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)) ∈ ℤ) → (((𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∧ (𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))) → (𝑂‘𝐵) ∥ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))))
121	29, 88, 59, 120	syl3anc 1371	. . . . . . . . 9 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) ∧ (𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))) → (𝑂‘𝐵) ∥ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵)))))
122	119, 66, 121	mp2and 697	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐵) ∥ (((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐴)) gcd ((𝑂‘(𝐴 + 𝐵)) · (𝑂‘𝐵))))
123	122, 94	breqtrd 5167	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (𝑂‘𝐵) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
124	52, 123	eqbrtrd 5163	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
125		dvdsmulcr 16211	. . . . . . 7 ⊢ ((((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ ∧ (𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℤ ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0)) → ((((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ↔ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵))))
126	46, 55, 37, 38, 125	syl112anc 1374	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ ((𝑂‘(𝐴 + 𝐵)) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ↔ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵))))
127	124, 126	mpbid 231	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵)))
128	41, 46	gcdcld 16431	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∈ ℕ₀)
129	128	nn0cnd 12516	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∈ ℂ)
130		1cnd 11191	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → 1 ∈ ℂ)
131	31	mullidd 11214	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (1 · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) = ((𝑂‘𝐴) gcd (𝑂‘𝐵)))
132	50, 52	oveq12d 7411	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = ((𝑂‘𝐴) gcd (𝑂‘𝐵)))
133		mulgcdr 16474	. . . . . . . . 9 ⊢ ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ ∧ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℕ₀) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
134	41, 46, 30, 133	syl3anc 1371	. . . . . . . 8 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd (((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
135	131, 132, 134	3eqtr2rd 2778	. . . . . . 7 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · ((𝑂‘𝐴) gcd (𝑂‘𝐵))) = (1 · ((𝑂‘𝐴) gcd (𝑂‘𝐵))))
136	129, 130, 31, 38, 135	mulcan2ad 11832	. . . . . 6 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = 1)
137		coprmdvds2 16573	. . . . . 6 ⊢ (((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ ∧ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∈ ℤ ∧ (𝑂‘(𝐴 + 𝐵)) ∈ ℤ) ∧ (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) gcd ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) = 1) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵)) ∧ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵))) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∥ (𝑂‘(𝐴 + 𝐵))))
138	41, 46, 55, 136, 137	syl31anc 1373	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵)) ∧ ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) ∥ (𝑂‘(𝐴 + 𝐵))) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∥ (𝑂‘(𝐴 + 𝐵))))
139	99, 127, 138	mp2and 697	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∥ (𝑂‘(𝐴 + 𝐵)))
140	41, 46	zmulcld 12654	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∈ ℤ)
141		zsqcl 14076	. . . . . 6 ⊢ (((𝑂‘𝐴) gcd (𝑂‘𝐵)) ∈ ℤ → (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2) ∈ ℤ)
142	37, 141	syl 17	. . . . 5 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2) ∈ ℤ)
143		dvdsmulc 16209	. . . . 5 ⊢ (((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∈ ℤ ∧ (𝑂‘(𝐴 + 𝐵)) ∈ ℤ ∧ (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2) ∈ ℤ) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∥ (𝑂‘(𝐴 + 𝐵)) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2))))
144	140, 55, 142, 143	syl3anc 1371	. . . 4 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) ∥ (𝑂‘(𝐴 + 𝐵)) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2))))
145	139, 144	mpd 15	. . 3 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((((𝑂‘𝐴) / ((𝑂‘𝐴) gcd (𝑂‘𝐵))) · ((𝑂‘𝐵) / ((𝑂‘𝐴) gcd (𝑂‘𝐵)))) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)))
146	54, 145	eqbrtrrd 5165	. 2 ⊢ (((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) ∧ ((𝑂‘𝐴) gcd (𝑂‘𝐵)) ≠ 0) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)))
147	27, 146	pm2.61dane 3028	1 ⊢ ((𝐺 ∈ Abel ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ((𝑂‘𝐴) · (𝑂‘𝐵)) ∥ ((𝑂‘(𝐴 + 𝐵)) · (((𝑂‘𝐴) gcd (𝑂‘𝐵))↑2)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2939 class class class wbr 5141 ‘cfv 6532 (class class class)co 7393 0cc0 11092 1c1 11093 · cmul 11097 / cdiv 11853 2c2 12249 ℕ₀cn0 12454 ℤcz 12540 ↑cexp 14009 ∥ cdvds 16179 gcd cgcd 16417 Basecbs 17126 +_gcplusg 17179 0_gc0g 17367 Grpcgrp 18794 ._gcmg 18922 odcod 19356 Abelcabl 19613

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 2702 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7708 ax-cnex 11148 ax-resscn 11149 ax-1cn 11150 ax-icn 11151 ax-addcl 11152 ax-addrcl 11153 ax-mulcl 11154 ax-mulrcl 11155 ax-mulcom 11156 ax-addass 11157 ax-mulass 11158 ax-distr 11159 ax-i2m1 11160 ax-1ne0 11161 ax-1rid 11162 ax-rnegex 11163 ax-rrecex 11164 ax-cnre 11165 ax-pre-lttri 11166 ax-pre-lttrn 11167 ax-pre-ltadd 11168 ax-pre-mulgt0 11169 ax-pre-sup 11170

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 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3774 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4523 df-pw 4598 df-sn 4623 df-pr 4625 df-op 4629 df-uni 4902 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6289 df-ord 6356 df-on 6357 df-lim 6358 df-suc 6359 df-iota 6484 df-fun 6534 df-fn 6535 df-f 6536 df-f1 6537 df-fo 6538 df-f1o 6539 df-fv 6540 df-riota 7349 df-ov 7396 df-oprab 7397 df-mpo 7398 df-om 7839 df-1st 7957 df-2nd 7958 df-frecs 8248 df-wrecs 8279 df-recs 8353 df-rdg 8392 df-er 8686 df-en 8923 df-dom 8924 df-sdom 8925 df-sup 9419 df-inf 9420 df-pnf 11232 df-mnf 11233 df-xr 11234 df-ltxr 11235 df-le 11236 df-sub 11428 df-neg 11429 df-div 11854 df-nn 12195 df-2 12257 df-3 12258 df-n0 12455 df-z 12541 df-uz 12805 df-rp 12957 df-fz 13467 df-fzo 13610 df-fl 13739 df-mod 13817 df-seq 13949 df-exp 14010 df-cj 15028 df-re 15029 df-im 15030 df-sqrt 15164 df-abs 15165 df-dvds 16180 df-gcd 16418 df-0g 17369 df-mgm 18543 df-sgrp 18592 df-mnd 18603 df-grp 18797 df-minusg 18798 df-sbg 18799 df-mulg 18923 df-od 19360 df-cmn 19614 df-abl 19615

This theorem is referenced by: odadd 19678

W3C validator