oddvds - Metamath Proof Explorer

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Theorem oddvds 19409

Description: The only multiples of 𝐴 that are equal to the identity are the multiples of the order of 𝐴. (Contributed by Mario Carneiro, 14-Jan-2015.) (Revised by Mario Carneiro, 23-Sep-2015.)

**Hypotheses**
Ref	Expression
odcl.1	⊢ 𝑋 = (Base‘𝐺)
odcl.2	⊢ 𝑂 = (od‘𝐺)
odid.3	⊢ · = (._g‘𝐺)
odid.4	⊢ 0 = (0_g‘𝐺)

**Assertion**
Ref	Expression
oddvds	⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 · 𝐴) = 0 ))

**Proof of Theorem oddvds**
Step	Hyp	Ref	Expression
1		simpr 485	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑂‘𝐴) ∈ ℕ)
2		simpl3 1193	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → 𝑁 ∈ ℤ)
3		dvdsval3 16197	. . . 4 ⊢ (((𝑂‘𝐴) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 mod (𝑂‘𝐴)) = 0))
4	1, 2, 3	syl2anc 584	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 mod (𝑂‘𝐴)) = 0))
5		simpl2 1192	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → 𝐴 ∈ 𝑋)
6		odcl.1	. . . . . . 7 ⊢ 𝑋 = (Base‘𝐺)
7		odid.4	. . . . . . 7 ⊢ 0 = (0_g‘𝐺)
8		odid.3	. . . . . . 7 ⊢ · = (._g‘𝐺)
9	6, 7, 8	mulg0 18951	. . . . . 6 ⊢ (𝐴 ∈ 𝑋 → (0 · 𝐴) = 0 )
10	5, 9	syl 17	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (0 · 𝐴) = 0 )
11		oveq1 7412	. . . . . 6 ⊢ ((𝑁 mod (𝑂‘𝐴)) = 0 → ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = (0 · 𝐴))
12	11	eqeq1d 2734	. . . . 5 ⊢ ((𝑁 mod (𝑂‘𝐴)) = 0 → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ↔ (0 · 𝐴) = 0 ))
13	10, 12	syl5ibrcom 246	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑁 mod (𝑂‘𝐴)) = 0 → ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ))
14	2	zred 12662	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → 𝑁 ∈ ℝ)
15	1	nnrpd 13010	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑂‘𝐴) ∈ ℝ⁺)
16		modlt 13841	. . . . . . . 8 ⊢ ((𝑁 ∈ ℝ ∧ (𝑂‘𝐴) ∈ ℝ⁺) → (𝑁 mod (𝑂‘𝐴)) < (𝑂‘𝐴))
17	14, 15, 16	syl2anc 584	. . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑁 mod (𝑂‘𝐴)) < (𝑂‘𝐴))
18	2, 1	zmodcld 13853	. . . . . . . . 9 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑁 mod (𝑂‘𝐴)) ∈ ℕ₀)
19	18	nn0red 12529	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑁 mod (𝑂‘𝐴)) ∈ ℝ)
20	1	nnred 12223	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑂‘𝐴) ∈ ℝ)
21	19, 20	ltnled 11357	. . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑁 mod (𝑂‘𝐴)) < (𝑂‘𝐴) ↔ ¬ (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴))))
22	17, 21	mpbid 231	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ¬ (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴)))
23		odcl.2	. . . . . . . . . . . 12 ⊢ 𝑂 = (od‘𝐺)
24	6, 23, 8, 7	odlem2 19401	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ) → (𝑂‘𝐴) ∈ (1...(𝑁 mod (𝑂‘𝐴))))
25		elfzle2 13501	. . . . . . . . . . 11 ⊢ ((𝑂‘𝐴) ∈ (1...(𝑁 mod (𝑂‘𝐴))) → (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴)))
26	24, 25	syl 17	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ) → (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴)))
27	26	3com23 1126	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑋 ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ∧ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ) → (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴)))
28	27	3expia 1121	. . . . . . . 8 ⊢ ((𝐴 ∈ 𝑋 ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ) → ((𝑁 mod (𝑂‘𝐴)) ∈ ℕ → (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴))))
29	28	con3d 152	. . . . . . 7 ⊢ ((𝐴 ∈ 𝑋 ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ) → (¬ (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴)) → ¬ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ))
30	29	impancom 452	. . . . . 6 ⊢ ((𝐴 ∈ 𝑋 ∧ ¬ (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴))) → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 → ¬ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ))
31	5, 22, 30	syl2anc 584	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 → ¬ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ))
32		elnn0 12470	. . . . . . 7 ⊢ ((𝑁 mod (𝑂‘𝐴)) ∈ ℕ₀ ↔ ((𝑁 mod (𝑂‘𝐴)) ∈ ℕ ∨ (𝑁 mod (𝑂‘𝐴)) = 0))
33	18, 32	sylib 217	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑁 mod (𝑂‘𝐴)) ∈ ℕ ∨ (𝑁 mod (𝑂‘𝐴)) = 0))
34	33	ord 862	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (¬ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ → (𝑁 mod (𝑂‘𝐴)) = 0))
35	31, 34	syld 47	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 → (𝑁 mod (𝑂‘𝐴)) = 0))
36	13, 35	impbid 211	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑁 mod (𝑂‘𝐴)) = 0 ↔ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ))
37	6, 23, 8, 7	odmod 19408	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = (𝑁 · 𝐴))
38	37	eqeq1d 2734	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ↔ (𝑁 · 𝐴) = 0 ))
39	4, 36, 38	3bitrd 304	. 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 · 𝐴) = 0 ))
40		simpr 485	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → (𝑂‘𝐴) = 0)
41	40	breq1d 5157	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → ((𝑂‘𝐴) ∥ 𝑁 ↔ 0 ∥ 𝑁))
42		simpl3 1193	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → 𝑁 ∈ ℤ)
43		0dvds 16216	. . . 4 ⊢ (𝑁 ∈ ℤ → (0 ∥ 𝑁 ↔ 𝑁 = 0))
44	42, 43	syl 17	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → (0 ∥ 𝑁 ↔ 𝑁 = 0))
45		simpl2 1192	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → 𝐴 ∈ 𝑋)
46	45, 9	syl 17	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → (0 · 𝐴) = 0 )
47		oveq1 7412	. . . . . 6 ⊢ (𝑁 = 0 → (𝑁 · 𝐴) = (0 · 𝐴))
48	47	eqeq1d 2734	. . . . 5 ⊢ (𝑁 = 0 → ((𝑁 · 𝐴) = 0 ↔ (0 · 𝐴) = 0 ))
49	46, 48	syl5ibrcom 246	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → (𝑁 = 0 → (𝑁 · 𝐴) = 0 ))
50	6, 23, 8, 7	odnncl 19407	. . . . . . . . 9 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 ≠ 0 ∧ (𝑁 · 𝐴) = 0 )) → (𝑂‘𝐴) ∈ ℕ)
51	50	nnne0d 12258	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 ≠ 0 ∧ (𝑁 · 𝐴) = 0 )) → (𝑂‘𝐴) ≠ 0)
52	51	expr 457	. . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 ≠ 0) → ((𝑁 · 𝐴) = 0 → (𝑂‘𝐴) ≠ 0))
53	52	impancom 452	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 · 𝐴) = 0 ) → (𝑁 ≠ 0 → (𝑂‘𝐴) ≠ 0))
54	53	necon4d 2964	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 · 𝐴) = 0 ) → ((𝑂‘𝐴) = 0 → 𝑁 = 0))
55	54	impancom 452	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → ((𝑁 · 𝐴) = 0 → 𝑁 = 0))
56	49, 55	impbid 211	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → (𝑁 = 0 ↔ (𝑁 · 𝐴) = 0 ))
57	41, 44, 56	3bitrd 304	. 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 · 𝐴) = 0 ))
58	6, 23	odcl 19398	. . . 4 ⊢ (𝐴 ∈ 𝑋 → (𝑂‘𝐴) ∈ ℕ₀)
59	58	3ad2ant2 1134	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘𝐴) ∈ ℕ₀)
60		elnn0 12470	. . 3 ⊢ ((𝑂‘𝐴) ∈ ℕ₀ ↔ ((𝑂‘𝐴) ∈ ℕ ∨ (𝑂‘𝐴) = 0))
61	59, 60	sylib 217	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → ((𝑂‘𝐴) ∈ ℕ ∨ (𝑂‘𝐴) = 0))
62	39, 57, 61	mpjaodan 957	1 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 · 𝐴) = 0 ))

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 class class class wbr 5147 ‘cfv 6540 (class class class)co 7405 ℝcr 11105 0cc0 11106 1c1 11107 < clt 11244 ≤ cle 11245 ℕcn 12208 ℕ₀cn0 12468 ℤcz 12554 ℝ⁺crp 12970 ...cfz 13480 mod cmo 13830 ∥ cdvds 16193 Basecbs 17140 0_gc0g 17381 Grpcgrp 18815 ._gcmg 18944 odcod 19386

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 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184

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 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-sup 9433 df-inf 9434 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-n0 12469 df-z 12555 df-uz 12819 df-rp 12971 df-fz 13481 df-fl 13753 df-mod 13831 df-seq 13963 df-exp 14024 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-dvds 16194 df-0g 17383 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-grp 18818 df-minusg 18819 df-sbg 18820 df-mulg 18945 df-od 19390

This theorem is referenced by: oddvdsi 19410 odcong 19411 odeq 19412 odmulgid 19416 odbezout 19420 gexdvds2 19447 gexod 19448 gexcl3 19449 odadd1 19710 odadd2 19711 oddvdssubg 19717 pgpfac1lem3a 19940 ablsimpgfindlem2 19972 chrdvds 21071 dchrfi 26747 dchrabs 26752 dchrptlem2 26757 idomodle 41923

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