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Theorem oddvds 19415

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 486	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑂‘𝐴) ∈ ℕ)
2		simpl3 1194	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → 𝑁 ∈ ℤ)
3		dvdsval3 16201	. . . 4 ⊢ (((𝑂‘𝐴) ∈ ℕ ∧ 𝑁 ∈ ℤ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 mod (𝑂‘𝐴)) = 0))
4	1, 2, 3	syl2anc 585	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 mod (𝑂‘𝐴)) = 0))
5		simpl2 1193	. . . . . 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 18957	. . . . . 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 7416	. . . . . 6 ⊢ ((𝑁 mod (𝑂‘𝐴)) = 0 → ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = (0 · 𝐴))
12	11	eqeq1d 2735	. . . . 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 12666	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → 𝑁 ∈ ℝ)
15	1	nnrpd 13014	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑂‘𝐴) ∈ ℝ⁺)
16		modlt 13845	. . . . . . . 8 ⊢ ((𝑁 ∈ ℝ ∧ (𝑂‘𝐴) ∈ ℝ⁺) → (𝑁 mod (𝑂‘𝐴)) < (𝑂‘𝐴))
17	14, 15, 16	syl2anc 585	. . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑁 mod (𝑂‘𝐴)) < (𝑂‘𝐴))
18	2, 1	zmodcld 13857	. . . . . . . . 9 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑁 mod (𝑂‘𝐴)) ∈ ℕ₀)
19	18	nn0red 12533	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑁 mod (𝑂‘𝐴)) ∈ ℝ)
20	1	nnred 12227	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (𝑂‘𝐴) ∈ ℝ)
21	19, 20	ltnled 11361	. . . . . . 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 19407	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑋 ∧ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ) → (𝑂‘𝐴) ∈ (1...(𝑁 mod (𝑂‘𝐴))))
25		elfzle2 13505	. . . . . . . . . . 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 1127	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑋 ∧ ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ∧ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ) → (𝑂‘𝐴) ≤ (𝑁 mod (𝑂‘𝐴)))
28	27	3expia 1122	. . . . . . . 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 453	. . . . . 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 585	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 → ¬ (𝑁 mod (𝑂‘𝐴)) ∈ ℕ))
32		elnn0 12474	. . . . . . 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 863	. . . . 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 19414	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑁 mod (𝑂‘𝐴)) · 𝐴) = (𝑁 · 𝐴))
38	37	eqeq1d 2735	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → (((𝑁 mod (𝑂‘𝐴)) · 𝐴) = 0 ↔ (𝑁 · 𝐴) = 0 ))
39	4, 36, 38	3bitrd 305	. 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) ∈ ℕ) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 · 𝐴) = 0 ))
40		simpr 486	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → (𝑂‘𝐴) = 0)
41	40	breq1d 5159	. . 3 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → ((𝑂‘𝐴) ∥ 𝑁 ↔ 0 ∥ 𝑁))
42		simpl3 1194	. . . 4 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → 𝑁 ∈ ℤ)
43		0dvds 16220	. . . 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 1193	. . . . . 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 7416	. . . . . 6 ⊢ (𝑁 = 0 → (𝑁 · 𝐴) = (0 · 𝐴))
48	47	eqeq1d 2735	. . . . 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 19413	. . . . . . . . 9 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 ≠ 0 ∧ (𝑁 · 𝐴) = 0 )) → (𝑂‘𝐴) ∈ ℕ)
51	50	nnne0d 12262	. . . . . . . 8 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 ≠ 0 ∧ (𝑁 · 𝐴) = 0 )) → (𝑂‘𝐴) ≠ 0)
52	51	expr 458	. . . . . . 7 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ 𝑁 ≠ 0) → ((𝑁 · 𝐴) = 0 → (𝑂‘𝐴) ≠ 0))
53	52	impancom 453	. . . . . 6 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 · 𝐴) = 0 ) → (𝑁 ≠ 0 → (𝑂‘𝐴) ≠ 0))
54	53	necon4d 2965	. . . . 5 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑁 · 𝐴) = 0 ) → ((𝑂‘𝐴) = 0 → 𝑁 = 0))
55	54	impancom 453	. . . 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 305	. 2 ⊢ (((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) ∧ (𝑂‘𝐴) = 0) → ((𝑂‘𝐴) ∥ 𝑁 ↔ (𝑁 · 𝐴) = 0 ))
58	6, 23	odcl 19404	. . . 4 ⊢ (𝐴 ∈ 𝑋 → (𝑂‘𝐴) ∈ ℕ₀)
59	58	3ad2ant2 1135	. . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝐴 ∈ 𝑋 ∧ 𝑁 ∈ ℤ) → (𝑂‘𝐴) ∈ ℕ₀)
60		elnn0 12474	. . 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 958	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 397 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 class class class wbr 5149 ‘cfv 6544 (class class class)co 7409 ℝcr 11109 0cc0 11110 1c1 11111 < clt 11248 ≤ cle 11249 ℕcn 12212 ℕ₀cn0 12472 ℤcz 12558 ℝ⁺crp 12974 ...cfz 13484 mod cmo 13834 ∥ cdvds 16197 Basecbs 17144 0_gc0g 17385 Grpcgrp 18819 ._gcmg 18950 odcod 19392

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-en 8940 df-dom 8941 df-sdom 8942 df-sup 9437 df-inf 9438 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-rp 12975 df-fz 13485 df-fl 13757 df-mod 13835 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-dvds 16198 df-0g 17387 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-grp 18822 df-minusg 18823 df-sbg 18824 df-mulg 18951 df-od 19396

This theorem is referenced by: oddvdsi 19416 odcong 19417 odeq 19418 odmulgid 19422 odbezout 19426 gexdvds2 19453 gexod 19454 gexcl3 19455 odadd1 19716 odadd2 19717 oddvdssubg 19723 pgpfac1lem3a 19946 ablsimpgfindlem2 19978 chrdvds 21080 dchrfi 26758 dchrabs 26763 dchrptlem2 26768 idomodle 41938

W3C validator