sylow3lem4 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > sylow3lem4		Structured version Visualization version GIF version

Theorem sylow3lem4 19498

Description: Lemma for sylow3 19501, first part. The number of Sylow subgroups is a divisor of the size of 𝐺 reduced by the size of a Sylow subgroup of 𝐺. (Contributed by Mario Carneiro, 19-Jan-2015.)

**Hypotheses**
Ref	Expression
sylow3.x	⊢ 𝑋 = (Base‘𝐺)
sylow3.g	⊢ (𝜑 → 𝐺 ∈ Grp)
sylow3.xf	⊢ (𝜑 → 𝑋 ∈ Fin)
sylow3.p	⊢ (𝜑 → 𝑃 ∈ ℙ)
sylow3lem1.a	⊢ + = (+_g‘𝐺)
sylow3lem1.d	⊢ − = (-_g‘𝐺)
sylow3lem1.m	⊢ ⊕ = (𝑥 ∈ 𝑋, 𝑦 ∈ (𝑃 pSyl 𝐺) ↦ ran (𝑧 ∈ 𝑦 ↦ ((𝑥 + 𝑧) − 𝑥)))
sylow3lem2.k	⊢ (𝜑 → 𝐾 ∈ (𝑃 pSyl 𝐺))
sylow3lem2.h	⊢ 𝐻 = {𝑢 ∈ 𝑋 ∣ (𝑢 ⊕ 𝐾) = 𝐾}
sylow3lem2.n	⊢ 𝑁 = {𝑥 ∈ 𝑋 ∣ ∀𝑦 ∈ 𝑋 ((𝑥 + 𝑦) ∈ 𝐾 ↔ (𝑦 + 𝑥) ∈ 𝐾)}

**Assertion**
Ref	Expression
sylow3lem4	⊢ (𝜑 → (♯‘(𝑃 pSyl 𝐺)) ∥ ((♯‘𝑋) / (𝑃↑(𝑃 pCnt (♯‘𝑋)))))

Distinct variable groups: 𝑥,𝑢,𝑦,𝑧, − 𝑢, ⊕ ,𝑥,𝑦,𝑧 𝑥,𝐻,𝑦 𝑢,𝐾,𝑥,𝑦,𝑧 𝑢,𝑁,𝑧 𝑢,𝑋,𝑥,𝑦,𝑧 𝑢,𝐺,𝑥,𝑦,𝑧 𝜑,𝑢,𝑥,𝑦,𝑧 𝑢, + ,𝑥,𝑦,𝑧 𝑢,𝑃,𝑥,𝑦,𝑧 Allowed substitution hints: 𝐻(𝑧,𝑢) 𝑁(𝑥,𝑦)

**Proof of Theorem sylow3lem4**
Step	Hyp	Ref	Expression
1		sylow3.x	. . 3 ⊢ 𝑋 = (Base‘𝐺)
2		sylow3.g	. . 3 ⊢ (𝜑 → 𝐺 ∈ Grp)
3		sylow3.xf	. . 3 ⊢ (𝜑 → 𝑋 ∈ Fin)
4		sylow3.p	. . 3 ⊢ (𝜑 → 𝑃 ∈ ℙ)
5		sylow3lem1.a	. . 3 ⊢ + = (+_g‘𝐺)
6		sylow3lem1.d	. . 3 ⊢ − = (-_g‘𝐺)
7		sylow3lem1.m	. . 3 ⊢ ⊕ = (𝑥 ∈ 𝑋, 𝑦 ∈ (𝑃 pSyl 𝐺) ↦ ran (𝑧 ∈ 𝑦 ↦ ((𝑥 + 𝑧) − 𝑥)))
8		sylow3lem2.k	. . 3 ⊢ (𝜑 → 𝐾 ∈ (𝑃 pSyl 𝐺))
9		sylow3lem2.h	. . 3 ⊢ 𝐻 = {𝑢 ∈ 𝑋 ∣ (𝑢 ⊕ 𝐾) = 𝐾}
10		sylow3lem2.n	. . 3 ⊢ 𝑁 = {𝑥 ∈ 𝑋 ∣ ∀𝑦 ∈ 𝑋 ((𝑥 + 𝑦) ∈ 𝐾 ↔ (𝑦 + 𝑥) ∈ 𝐾)}
11	1, 2, 3, 4, 5, 6, 7, 8, 9, 10	sylow3lem3 19497	. 2 ⊢ (𝜑 → (♯‘(𝑃 pSyl 𝐺)) = (♯‘(𝑋 / (𝐺 ~_QG 𝑁))))
12		slwsubg 19478	. . . . . . . . . 10 ⊢ (𝐾 ∈ (𝑃 pSyl 𝐺) → 𝐾 ∈ (SubGrp‘𝐺))
13	8, 12	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝐾 ∈ (SubGrp‘𝐺))
14		eqid 2733	. . . . . . . . . . 11 ⊢ (𝐺 ↾_s 𝑁) = (𝐺 ↾_s 𝑁)
15	10, 1, 5, 14	nmznsg 19048	. . . . . . . . . 10 ⊢ (𝐾 ∈ (SubGrp‘𝐺) → 𝐾 ∈ (NrmSGrp‘(𝐺 ↾_s 𝑁)))
16		nsgsubg 19038	. . . . . . . . . 10 ⊢ (𝐾 ∈ (NrmSGrp‘(𝐺 ↾_s 𝑁)) → 𝐾 ∈ (SubGrp‘(𝐺 ↾_s 𝑁)))
17	15, 16	syl 17	. . . . . . . . 9 ⊢ (𝐾 ∈ (SubGrp‘𝐺) → 𝐾 ∈ (SubGrp‘(𝐺 ↾_s 𝑁)))
18	13, 17	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝐾 ∈ (SubGrp‘(𝐺 ↾_s 𝑁)))
19	10, 1, 5	nmzsubg 19045	. . . . . . . . . . 11 ⊢ (𝐺 ∈ Grp → 𝑁 ∈ (SubGrp‘𝐺))
20	2, 19	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ∈ (SubGrp‘𝐺))
21	14	subgbas 19010	. . . . . . . . . 10 ⊢ (𝑁 ∈ (SubGrp‘𝐺) → 𝑁 = (Base‘(𝐺 ↾_s 𝑁)))
22	20, 21	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑁 = (Base‘(𝐺 ↾_s 𝑁)))
23	1	subgss 19007	. . . . . . . . . . 11 ⊢ (𝑁 ∈ (SubGrp‘𝐺) → 𝑁 ⊆ 𝑋)
24	20, 23	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ⊆ 𝑋)
25	3, 24	ssfid 9267	. . . . . . . . 9 ⊢ (𝜑 → 𝑁 ∈ Fin)
26	22, 25	eqeltrrd 2835	. . . . . . . 8 ⊢ (𝜑 → (Base‘(𝐺 ↾_s 𝑁)) ∈ Fin)
27		eqid 2733	. . . . . . . . 9 ⊢ (Base‘(𝐺 ↾_s 𝑁)) = (Base‘(𝐺 ↾_s 𝑁))
28	27	lagsubg 19072	. . . . . . . 8 ⊢ ((𝐾 ∈ (SubGrp‘(𝐺 ↾_s 𝑁)) ∧ (Base‘(𝐺 ↾_s 𝑁)) ∈ Fin) → (♯‘𝐾) ∥ (♯‘(Base‘(𝐺 ↾_s 𝑁))))
29	18, 26, 28	syl2anc 585	. . . . . . 7 ⊢ (𝜑 → (♯‘𝐾) ∥ (♯‘(Base‘(𝐺 ↾_s 𝑁))))
30	22	fveq2d 6896	. . . . . . 7 ⊢ (𝜑 → (♯‘𝑁) = (♯‘(Base‘(𝐺 ↾_s 𝑁))))
31	29, 30	breqtrrd 5177	. . . . . 6 ⊢ (𝜑 → (♯‘𝐾) ∥ (♯‘𝑁))
32		eqid 2733	. . . . . . . . . . . 12 ⊢ (0_g‘𝐺) = (0_g‘𝐺)
33	32	subg0cl 19014	. . . . . . . . . . 11 ⊢ (𝐾 ∈ (SubGrp‘𝐺) → (0_g‘𝐺) ∈ 𝐾)
34	13, 33	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → (0_g‘𝐺) ∈ 𝐾)
35	34	ne0d 4336	. . . . . . . . 9 ⊢ (𝜑 → 𝐾 ≠ ∅)
36	1	subgss 19007	. . . . . . . . . . . 12 ⊢ (𝐾 ∈ (SubGrp‘𝐺) → 𝐾 ⊆ 𝑋)
37	13, 36	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐾 ⊆ 𝑋)
38	3, 37	ssfid 9267	. . . . . . . . . 10 ⊢ (𝜑 → 𝐾 ∈ Fin)
39		hashnncl 14326	. . . . . . . . . 10 ⊢ (𝐾 ∈ Fin → ((♯‘𝐾) ∈ ℕ ↔ 𝐾 ≠ ∅))
40	38, 39	syl 17	. . . . . . . . 9 ⊢ (𝜑 → ((♯‘𝐾) ∈ ℕ ↔ 𝐾 ≠ ∅))
41	35, 40	mpbird 257	. . . . . . . 8 ⊢ (𝜑 → (♯‘𝐾) ∈ ℕ)
42	41	nnzd 12585	. . . . . . 7 ⊢ (𝜑 → (♯‘𝐾) ∈ ℤ)
43		hashcl 14316	. . . . . . . . 9 ⊢ (𝑁 ∈ Fin → (♯‘𝑁) ∈ ℕ₀)
44	25, 43	syl 17	. . . . . . . 8 ⊢ (𝜑 → (♯‘𝑁) ∈ ℕ₀)
45	44	nn0zd 12584	. . . . . . 7 ⊢ (𝜑 → (♯‘𝑁) ∈ ℤ)
46		pwfi 9178	. . . . . . . . . . 11 ⊢ (𝑋 ∈ Fin ↔ 𝒫 𝑋 ∈ Fin)
47	3, 46	sylib 217	. . . . . . . . . 10 ⊢ (𝜑 → 𝒫 𝑋 ∈ Fin)
48		eqid 2733	. . . . . . . . . . . . 13 ⊢ (𝐺 ~_QG 𝑁) = (𝐺 ~_QG 𝑁)
49	1, 48	eqger 19058	. . . . . . . . . . . 12 ⊢ (𝑁 ∈ (SubGrp‘𝐺) → (𝐺 ~_QG 𝑁) Er 𝑋)
50	20, 49	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐺 ~_QG 𝑁) Er 𝑋)
51	50	qsss 8772	. . . . . . . . . 10 ⊢ (𝜑 → (𝑋 / (𝐺 ~_QG 𝑁)) ⊆ 𝒫 𝑋)
52	47, 51	ssfid 9267	. . . . . . . . 9 ⊢ (𝜑 → (𝑋 / (𝐺 ~_QG 𝑁)) ∈ Fin)
53		hashcl 14316	. . . . . . . . 9 ⊢ ((𝑋 / (𝐺 ~_QG 𝑁)) ∈ Fin → (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∈ ℕ₀)
54	52, 53	syl 17	. . . . . . . 8 ⊢ (𝜑 → (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∈ ℕ₀)
55	54	nn0zd 12584	. . . . . . 7 ⊢ (𝜑 → (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∈ ℤ)
56		dvdscmul 16226	. . . . . . 7 ⊢ (((♯‘𝐾) ∈ ℤ ∧ (♯‘𝑁) ∈ ℤ ∧ (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∈ ℤ) → ((♯‘𝐾) ∥ (♯‘𝑁) → ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝐾)) ∥ ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝑁))))
57	42, 45, 55, 56	syl3anc 1372	. . . . . 6 ⊢ (𝜑 → ((♯‘𝐾) ∥ (♯‘𝑁) → ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝐾)) ∥ ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝑁))))
58	31, 57	mpd 15	. . . . 5 ⊢ (𝜑 → ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝐾)) ∥ ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝑁)))
59		hashcl 14316	. . . . . . . . 9 ⊢ (𝑋 ∈ Fin → (♯‘𝑋) ∈ ℕ₀)
60	3, 59	syl 17	. . . . . . . 8 ⊢ (𝜑 → (♯‘𝑋) ∈ ℕ₀)
61	60	nn0cnd 12534	. . . . . . 7 ⊢ (𝜑 → (♯‘𝑋) ∈ ℂ)
62	41	nncnd 12228	. . . . . . 7 ⊢ (𝜑 → (♯‘𝐾) ∈ ℂ)
63	41	nnne0d 12262	. . . . . . 7 ⊢ (𝜑 → (♯‘𝐾) ≠ 0)
64	61, 62, 63	divcan1d 11991	. . . . . 6 ⊢ (𝜑 → (((♯‘𝑋) / (♯‘𝐾)) · (♯‘𝐾)) = (♯‘𝑋))
65	1, 48, 20, 3	lagsubg2 19071	. . . . . 6 ⊢ (𝜑 → (♯‘𝑋) = ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝑁)))
66	64, 65	eqtrd 2773	. . . . 5 ⊢ (𝜑 → (((♯‘𝑋) / (♯‘𝐾)) · (♯‘𝐾)) = ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝑁)))
67	58, 66	breqtrrd 5177	. . . 4 ⊢ (𝜑 → ((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝐾)) ∥ (((♯‘𝑋) / (♯‘𝐾)) · (♯‘𝐾)))
68	1	lagsubg 19072	. . . . . . 7 ⊢ ((𝐾 ∈ (SubGrp‘𝐺) ∧ 𝑋 ∈ Fin) → (♯‘𝐾) ∥ (♯‘𝑋))
69	13, 3, 68	syl2anc 585	. . . . . 6 ⊢ (𝜑 → (♯‘𝐾) ∥ (♯‘𝑋))
70	60	nn0zd 12584	. . . . . . 7 ⊢ (𝜑 → (♯‘𝑋) ∈ ℤ)
71		dvdsval2 16200	. . . . . . 7 ⊢ (((♯‘𝐾) ∈ ℤ ∧ (♯‘𝐾) ≠ 0 ∧ (♯‘𝑋) ∈ ℤ) → ((♯‘𝐾) ∥ (♯‘𝑋) ↔ ((♯‘𝑋) / (♯‘𝐾)) ∈ ℤ))
72	42, 63, 70, 71	syl3anc 1372	. . . . . 6 ⊢ (𝜑 → ((♯‘𝐾) ∥ (♯‘𝑋) ↔ ((♯‘𝑋) / (♯‘𝐾)) ∈ ℤ))
73	69, 72	mpbid 231	. . . . 5 ⊢ (𝜑 → ((♯‘𝑋) / (♯‘𝐾)) ∈ ℤ)
74		dvdsmulcr 16229	. . . . 5 ⊢ (((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∈ ℤ ∧ ((♯‘𝑋) / (♯‘𝐾)) ∈ ℤ ∧ ((♯‘𝐾) ∈ ℤ ∧ (♯‘𝐾) ≠ 0)) → (((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝐾)) ∥ (((♯‘𝑋) / (♯‘𝐾)) · (♯‘𝐾)) ↔ (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∥ ((♯‘𝑋) / (♯‘𝐾))))
75	55, 73, 42, 63, 74	syl112anc 1375	. . . 4 ⊢ (𝜑 → (((♯‘(𝑋 / (𝐺 ~_QG 𝑁))) · (♯‘𝐾)) ∥ (((♯‘𝑋) / (♯‘𝐾)) · (♯‘𝐾)) ↔ (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∥ ((♯‘𝑋) / (♯‘𝐾))))
76	67, 75	mpbid 231	. . 3 ⊢ (𝜑 → (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∥ ((♯‘𝑋) / (♯‘𝐾)))
77	1, 3, 8	slwhash 19492	. . . 4 ⊢ (𝜑 → (♯‘𝐾) = (𝑃↑(𝑃 pCnt (♯‘𝑋))))
78	77	oveq2d 7425	. . 3 ⊢ (𝜑 → ((♯‘𝑋) / (♯‘𝐾)) = ((♯‘𝑋) / (𝑃↑(𝑃 pCnt (♯‘𝑋)))))
79	76, 78	breqtrd 5175	. 2 ⊢ (𝜑 → (♯‘(𝑋 / (𝐺 ~_QG 𝑁))) ∥ ((♯‘𝑋) / (𝑃↑(𝑃 pCnt (♯‘𝑋)))))
80	11, 79	eqbrtrd 5171	1 ⊢ (𝜑 → (♯‘(𝑃 pSyl 𝐺)) ∥ ((♯‘𝑋) / (𝑃↑(𝑃 pCnt (♯‘𝑋)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 {crab 3433 ⊆ wss 3949 ∅c0 4323 𝒫 cpw 4603 class class class wbr 5149 ↦ cmpt 5232 ran crn 5678 ‘cfv 6544 (class class class)co 7409 ∈ cmpo 7411 Er wer 8700 / cqs 8702 Fincfn 8939 0cc0 11110 · cmul 11115 / cdiv 11871 ℕcn 12212 ℕ₀cn0 12472 ℤcz 12558 ↑cexp 14027 ♯chash 14290 ∥ cdvds 16197 ℙcprime 16608 pCnt cpc 16769 Basecbs 17144 ↾_s cress 17173 +_gcplusg 17197 0_gc0g 17385 Grpcgrp 18819 -_gcsg 18821 SubGrpcsubg 19000 NrmSGrpcnsg 19001 ~_QG cqg 19002 pSyl cslw 19395

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-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 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-int 4952 df-iun 5000 df-disj 5115 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-se 5633 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-isom 6553 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-1o 8466 df-2o 8467 df-oadd 8470 df-omul 8471 df-er 8703 df-ec 8705 df-qs 8709 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9437 df-inf 9438 df-oi 9505 df-dju 9896 df-card 9934 df-acn 9937 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-xnn0 12545 df-z 12559 df-uz 12823 df-q 12933 df-rp 12975 df-fz 13485 df-fzo 13628 df-fl 13757 df-mod 13835 df-seq 13967 df-exp 14028 df-fac 14234 df-bc 14263 df-hash 14291 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-clim 15432 df-sum 15633 df-dvds 16198 df-gcd 16436 df-prm 16609 df-pc 16770 df-sets 17097 df-slot 17115 df-ndx 17127 df-base 17145 df-ress 17174 df-plusg 17210 df-0g 17387 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-submnd 18672 df-grp 18822 df-minusg 18823 df-sbg 18824 df-mulg 18951 df-subg 19003 df-nsg 19004 df-eqg 19005 df-ghm 19090 df-ga 19154 df-od 19396 df-pgp 19398 df-slw 19399

This theorem is referenced by: sylow3 19501

W3C validator