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Theorem odmulg 19465

Description: Relationship between the order of an element and that of a multiple. (Contributed by Stefan O'Rear, 6-Sep-2015.)

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

**Assertion**
Ref	Expression
odmulg	⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘𝐴) = ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))))

Proof of Theorem odmulg Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		odmulgid.1	. . . . . . . . 9 ⊢ 𝑋 = (Base‘𝐺)
2		odmulgid.3	. . . . . . . . 9 ⊢ · = (._g‘𝐺)
3	1, 2	mulgcl 19007	. . . . . . . 8 ⊢ ((𝐺 ∈ Grp ∧ 𝑁 ∈ ℤ ∧ 𝐴 ∈ 𝑋) → (𝑁 · 𝐴) ∈ 𝑋)
4	3	3com23 1126	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑁 · 𝐴) ∈ 𝑋)
5		odmulgid.2	. . . . . . . 8 ⊢ 𝑂 = (od‘𝐺)
6	1, 5	odcl 19445	. . . . . . 7 ⊢ ((𝑁 · 𝐴) ∈ 𝑋 → (𝑂‘(𝑁 · 𝐴)) ∈ ℕ₀)
7	4, 6	syl 17	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘(𝑁 · 𝐴)) ∈ ℕ₀)
8	7	nn0cnd 12538	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘(𝑁 · 𝐴)) ∈ ℂ)
9	8	adantr 481	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) = 0) → (𝑂‘(𝑁 · 𝐴)) ∈ ℂ)
10	9	mul02d 11416	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) = 0) → (0 · (𝑂‘(𝑁 · 𝐴))) = 0)
11		simpr 485	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) = 0) → (𝑁 gcd (𝑂‘𝐴)) = 0)
12	11	oveq1d 7426	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) = 0) → ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) = (0 · (𝑂‘(𝑁 · 𝐴))))
13		simp3 1138	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → 𝑁 ∈ ℤ)
14	1, 5	odcl 19445	. . . . . . 7 ⊢ (𝐴 ∈ 𝑋 → (𝑂‘𝐴) ∈ ℕ₀)
15	14	3ad2ant2 1134	. . . . . 6 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘𝐴) ∈ ℕ₀)
16	15	nn0zd 12588	. . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘𝐴) ∈ ℤ)
17		gcdeq0 16462	. . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ (𝑂‘𝐴) ∈ ℤ) → ((𝑁 gcd (𝑂‘𝐴)) = 0 ↔ (𝑁 = 0 ∧ (𝑂‘𝐴) = 0)))
18	13, 16, 17	syl2anc 584	. . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → ((𝑁 gcd (𝑂‘𝐴)) = 0 ↔ (𝑁 = 0 ∧ (𝑂‘𝐴) = 0)))
19	18	simplbda 500	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) = 0) → (𝑂‘𝐴) = 0)
20	10, 12, 19	3eqtr4rd 2783	. 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) = 0) → (𝑂‘𝐴) = ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))))
21		simpll3 1214	. . . . . . . 8 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → 𝑁 ∈ ℤ)
22	16	ad2antrr 724	. . . . . . . 8 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → (𝑂‘𝐴) ∈ ℤ)
23		gcddvds 16448	. . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ (𝑂‘𝐴) ∈ ℤ) → ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑁 ∧ (𝑁 gcd (𝑂‘𝐴)) ∥ (𝑂‘𝐴)))
24	21, 22, 23	syl2anc 584	. . . . . . 7 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑁 ∧ (𝑁 gcd (𝑂‘𝐴)) ∥ (𝑂‘𝐴)))
25	24	simprd 496	. . . . . 6 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → (𝑁 gcd (𝑂‘𝐴)) ∥ (𝑂‘𝐴))
26	13, 16	gcdcld 16453	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑁 gcd (𝑂‘𝐴)) ∈ ℕ₀)
27	26	adantr 481	. . . . . . . . 9 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → (𝑁 gcd (𝑂‘𝐴)) ∈ ℕ₀)
28	27	nn0zd 12588	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → (𝑁 gcd (𝑂‘𝐴)) ∈ ℤ)
29	28	adantr 481	. . . . . . 7 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → (𝑁 gcd (𝑂‘𝐴)) ∈ ℤ)
30		nn0z 12587	. . . . . . . 8 ⊢ (𝑥 ∈ ℕ₀ → 𝑥 ∈ ℤ)
31	30	adantl 482	. . . . . . 7 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → 𝑥 ∈ ℤ)
32		dvdstr 16241	. . . . . . 7 ⊢ (((𝑁 gcd (𝑂‘𝐴)) ∈ ℤ ∧ (𝑂‘𝐴) ∈ ℤ ∧ 𝑥 ∈ ℤ) → (((𝑁 gcd (𝑂‘𝐴)) ∥ (𝑂‘𝐴) ∧ (𝑂‘𝐴) ∥ 𝑥) → (𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥))
33	29, 22, 31, 32	syl3anc 1371	. . . . . 6 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → (((𝑁 gcd (𝑂‘𝐴)) ∥ (𝑂‘𝐴) ∧ (𝑂‘𝐴) ∥ 𝑥) → (𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥))
34	25, 33	mpand 693	. . . . 5 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → ((𝑂‘𝐴) ∥ 𝑥 → (𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥))
35	7	nn0zd 12588	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘(𝑁 · 𝐴)) ∈ ℤ)
36	35	ad2antrr 724	. . . . . 6 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → (𝑂‘(𝑁 · 𝐴)) ∈ ℤ)
37		muldvds1 16228	. . . . . 6 ⊢ (((𝑁 gcd (𝑂‘𝐴)) ∈ ℤ ∧ (𝑂‘(𝑁 · 𝐴)) ∈ ℤ ∧ 𝑥 ∈ ℤ) → (((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥 → (𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥))
38	29, 36, 31, 37	syl3anc 1371	. . . . 5 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → (((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥 → (𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥))
39		dvdszrcl 16206	. . . . . . . . 9 ⊢ ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 → ((𝑁 gcd (𝑂‘𝐴)) ∈ ℤ ∧ 𝑥 ∈ ℤ))
40		divides 16203	. . . . . . . . 9 ⊢ (((𝑁 gcd (𝑂‘𝐴)) ∈ ℤ ∧ 𝑥 ∈ ℤ) → ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 ↔ ∃𝑦 ∈ ℤ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥))
41	39, 40	syl 17	. . . . . . . 8 ⊢ ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 → ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 ↔ ∃𝑦 ∈ ℤ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥))
42	41	ibi 266	. . . . . . 7 ⊢ ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 → ∃𝑦 ∈ ℤ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥)
43	35	adantr 481	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → (𝑂‘(𝑁 · 𝐴)) ∈ ℤ)
44		simprr 771	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → 𝑦 ∈ ℤ)
45	28	adantrr 715	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → (𝑁 gcd (𝑂‘𝐴)) ∈ ℤ)
46		simprl 769	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → (𝑁 gcd (𝑂‘𝐴)) ≠ 0)
47		dvdscmulr 16232	. . . . . . . . . . . . 13 ⊢ (((𝑂‘(𝑁 · 𝐴)) ∈ ℤ ∧ 𝑦 ∈ ℤ ∧ ((𝑁 gcd (𝑂‘𝐴)) ∈ ℤ ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0)) → (((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ ((𝑁 gcd (𝑂‘𝐴)) · 𝑦) ↔ (𝑂‘(𝑁 · 𝐴)) ∥ 𝑦))
48	43, 44, 45, 46, 47	syl112anc 1374	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → (((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ ((𝑁 gcd (𝑂‘𝐴)) · 𝑦) ↔ (𝑂‘(𝑁 · 𝐴)) ∥ 𝑦))
49	1, 5, 2	odmulgid 19463	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ 𝑦 ∈ ℤ) → ((𝑂‘(𝑁 · 𝐴)) ∥ 𝑦 ↔ (𝑂‘𝐴) ∥ (𝑦 · 𝑁)))
50	49	adantrl 714	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → ((𝑂‘(𝑁 · 𝐴)) ∥ 𝑦 ↔ (𝑂‘𝐴) ∥ (𝑦 · 𝑁)))
51		simpl3 1193	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → 𝑁 ∈ ℤ)
52		dvdsmulgcd 16501	. . . . . . . . . . . . 13 ⊢ ((𝑦 ∈ ℤ ∧ 𝑁 ∈ ℤ) → ((𝑂‘𝐴) ∥ (𝑦 · 𝑁) ↔ (𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴)))))
53	44, 51, 52	syl2anc 584	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → ((𝑂‘𝐴) ∥ (𝑦 · 𝑁) ↔ (𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴)))))
54	48, 50, 53	3bitrrd 305	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → ((𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ ((𝑁 gcd (𝑂‘𝐴)) · 𝑦)))
55	45	zcnd 12671	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → (𝑁 gcd (𝑂‘𝐴)) ∈ ℂ)
56	44	zcnd 12671	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → 𝑦 ∈ ℂ)
57	55, 56	mulcomd 11239	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → ((𝑁 gcd (𝑂‘𝐴)) · 𝑦) = (𝑦 · (𝑁 gcd (𝑂‘𝐴))))
58	57	breq2d 5160	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → (((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ ((𝑁 gcd (𝑂‘𝐴)) · 𝑦) ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴)))))
59	54, 58	bitrd 278	. . . . . . . . . 10 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ ((𝑁 gcd (𝑂‘𝐴)) ≠ 0 ∧ 𝑦 ∈ ℤ)) → ((𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴)))))
60	59	anassrs 468	. . . . . . . . 9 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑦 ∈ ℤ) → ((𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴)))))
61		breq2 5152	. . . . . . . . . 10 ⊢ ((𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥 → ((𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) ↔ (𝑂‘𝐴) ∥ 𝑥))
62		breq2 5152	. . . . . . . . . 10 ⊢ ((𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥 → (((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥))
63	61, 62	bibi12d 345	. . . . . . . . 9 ⊢ ((𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥 → (((𝑂‘𝐴) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ (𝑦 · (𝑁 gcd (𝑂‘𝐴)))) ↔ ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
64	60, 63	syl5ibcom 244	. . . . . . . 8 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑦 ∈ ℤ) → ((𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥 → ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
65	64	rexlimdva 3155	. . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → (∃𝑦 ∈ ℤ (𝑦 · (𝑁 gcd (𝑂‘𝐴))) = 𝑥 → ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
66	42, 65	syl5 34	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 → ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
67	66	adantr 481	. . . . 5 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → ((𝑁 gcd (𝑂‘𝐴)) ∥ 𝑥 → ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
68	34, 38, 67	pm5.21ndd 380	. . . 4 ⊢ ((((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) ∧ 𝑥 ∈ ℕ₀) → ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥))
69	68	ralrimiva 3146	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → ∀𝑥 ∈ ℕ₀ ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥))
70	15	adantr 481	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → (𝑂‘𝐴) ∈ ℕ₀)
71	7	adantr 481	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → (𝑂‘(𝑁 · 𝐴)) ∈ ℕ₀)
72	27, 71	nn0mulcld 12541	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∈ ℕ₀)
73		dvdsext 16268	. . . 4 ⊢ (((𝑂‘𝐴) ∈ ℕ₀ ∧ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∈ ℕ₀) → ((𝑂‘𝐴) = ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ↔ ∀𝑥 ∈ ℕ₀ ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
74	70, 72, 73	syl2anc 584	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → ((𝑂‘𝐴) = ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ↔ ∀𝑥 ∈ ℕ₀ ((𝑂‘𝐴) ∥ 𝑥 ↔ ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))) ∥ 𝑥)))
75	69, 74	mpbird 256	. 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 gcd (𝑂‘𝐴)) ≠ 0) → (𝑂‘𝐴) = ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))))
76	20, 75	pm2.61dane 3029	1 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘𝐴) = ((𝑁 gcd (𝑂‘𝐴)) · (𝑂‘(𝑁 · 𝐴))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∃wrex 3070 class class class wbr 5148 ‘cfv 6543 (class class class)co 7411 ℂcc 11110 0cc0 11112 · cmul 11117 ℕ₀cn0 12476 ℤcz 12562 ∥ cdvds 16201 gcd cgcd 16439 Basecbs 17148 Grpcgrp 18855 ._gcmg 18986 odcod 19433

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 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190

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-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 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-sup 9439 df-inf 9440 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-rp 12979 df-fz 13489 df-fl 13761 df-mod 13839 df-seq 13971 df-exp 14032 df-cj 15050 df-re 15051 df-im 15052 df-sqrt 15186 df-abs 15187 df-dvds 16202 df-gcd 16440 df-0g 17391 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-grp 18858 df-minusg 18859 df-sbg 18860 df-mulg 18987 df-od 19437

This theorem is referenced by: odmulgeq 19466 odinv 19470 gexexlem 19761 fincygsubgodd 20023

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