Theorem subgslw 19522

Description: A Sylow subgroup that is contained in a larger subgroup is also Sylow with respect to the subgroup. (The converse need not be true.) (Contributed by Mario Carneiro, 19-Jan-2015.)

Hypothesis

Ref	Expression
subgslw.1	⊢ 𝐻 = (𝐺 ↾s 𝑆)

Assertion

Ref	Expression
subgslw	⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → 𝐾 ∈ (𝑃 pSyl 𝐻))

Proof of Theorem subgslw

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		slwprm 19515	. . 3 ⊢ (𝐾 ∈ (𝑃 pSyl 𝐺) → 𝑃 ∈ ℙ)
2	1	3ad2ant2 1134	. 2 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → 𝑃 ∈ ℙ)
3		slwsubg 19516	. . . 4 ⊢ (𝐾 ∈ (𝑃 pSyl 𝐺) → 𝐾 ∈ (SubGrp‘𝐺))
4	3	3ad2ant2 1134	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → 𝐾 ∈ (SubGrp‘𝐺))
5		simp3 1138	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → 𝐾 ⊆ 𝑆)
6		subgslw.1	. . . . 5 ⊢ 𝐻 = (𝐺 ↾s 𝑆)
7	6	subsubg 19057	. . . 4 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (𝐾 ∈ (SubGrp‘𝐻) ↔ (𝐾 ∈ (SubGrp‘𝐺) ∧ 𝐾 ⊆ 𝑆)))
8	7	3ad2ant1 1133	. . 3 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → (𝐾 ∈ (SubGrp‘𝐻) ↔ (𝐾 ∈ (SubGrp‘𝐺) ∧ 𝐾 ⊆ 𝑆)))
9	4, 5, 8	mpbir2and 713	. 2 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → 𝐾 ∈ (SubGrp‘𝐻))
10	6	oveq1i 7379	. . . . . . 7 ⊢ (𝐻 ↾s 𝑥) = ((𝐺 ↾s 𝑆) ↾s 𝑥)
11		simpl1 1192	. . . . . . . 8 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → 𝑆 ∈ (SubGrp‘𝐺))
12	6	subsubg 19057	. . . . . . . . . 10 ⊢ (𝑆 ∈ (SubGrp‘𝐺) → (𝑥 ∈ (SubGrp‘𝐻) ↔ (𝑥 ∈ (SubGrp‘𝐺) ∧ 𝑥 ⊆ 𝑆)))
13	12	3ad2ant1 1133	. . . . . . . . 9 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → (𝑥 ∈ (SubGrp‘𝐻) ↔ (𝑥 ∈ (SubGrp‘𝐺) ∧ 𝑥 ⊆ 𝑆)))
14	13	simplbda 499	. . . . . . . 8 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → 𝑥 ⊆ 𝑆)
15		ressabs 17194	. . . . . . . 8 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝑥 ⊆ 𝑆) → ((𝐺 ↾s 𝑆) ↾s 𝑥) = (𝐺 ↾s 𝑥))
16	11, 14, 15	syl2anc 584	. . . . . . 7 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → ((𝐺 ↾s 𝑆) ↾s 𝑥) = (𝐺 ↾s 𝑥))
17	10, 16	eqtrid 2776	. . . . . 6 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → (𝐻 ↾s 𝑥) = (𝐺 ↾s 𝑥))
18	17	breq2d 5114	. . . . 5 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → (𝑃 pGrp (𝐻 ↾s 𝑥) ↔ 𝑃 pGrp (𝐺 ↾s 𝑥)))
19	18	anbi2d 630	. . . 4 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → ((𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐻 ↾s 𝑥)) ↔ (𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐺 ↾s 𝑥))))
20		simpl2 1193	. . . . 5 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → 𝐾 ∈ (𝑃 pSyl 𝐺))
21	13	simprbda 498	. . . . 5 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → 𝑥 ∈ (SubGrp‘𝐺))
22		eqid 2729	. . . . . 6 ⊢ (𝐺 ↾s 𝑥) = (𝐺 ↾s 𝑥)
23	22	slwispgp 19517	. . . . 5 ⊢ ((𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝑥 ∈ (SubGrp‘𝐺)) → ((𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐺 ↾s 𝑥)) ↔ 𝐾 = 𝑥))
24	20, 21, 23	syl2anc 584	. . . 4 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → ((𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐺 ↾s 𝑥)) ↔ 𝐾 = 𝑥))
25	19, 24	bitrd 279	. . 3 ⊢ (((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) ∧ 𝑥 ∈ (SubGrp‘𝐻)) → ((𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐻 ↾s 𝑥)) ↔ 𝐾 = 𝑥))
26	25	ralrimiva 3125	. 2 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → ∀𝑥 ∈ (SubGrp‘𝐻)((𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐻 ↾s 𝑥)) ↔ 𝐾 = 𝑥))
27		isslw 19514	. 2 ⊢ (𝐾 ∈ (𝑃 pSyl 𝐻) ↔ (𝑃 ∈ ℙ ∧ 𝐾 ∈ (SubGrp‘𝐻) ∧ ∀𝑥 ∈ (SubGrp‘𝐻)((𝐾 ⊆ 𝑥 ∧ 𝑃 pGrp (𝐻 ↾s 𝑥)) ↔ 𝐾 = 𝑥)))
28	2, 9, 26, 27	syl3anbrc 1344	1 ⊢ ((𝑆 ∈ (SubGrp‘𝐺) ∧ 𝐾 ∈ (𝑃 pSyl 𝐺) ∧ 𝐾 ⊆ 𝑆) → 𝐾 ∈ (𝑃 pSyl 𝐻))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109  ∀wral 3044   ⊆ wss 3911   class class class wbr 5102  ‘cfv 6499  (class class class)co 7369  ℙcprime 16617   ↾_s cress 17176  SubGrpcsubg 19028   pGrp cpgp 19432   pSyl cslw 19433

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382  ax-un 7691  ax-cnex 11100  ax-1cn 11102  ax-addcl 11104

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3352  df-rab 3403  df-v 3446  df-sbc 3751  df-csb 3860  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-pss 3931  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-iun 4953  df-br 5103  df-opab 5165  df-mpt 5184  df-tr 5210  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6262  df-ord 6323  df-on 6324  df-lim 6325  df-suc 6326  df-iota 6452  df-fun 6501  df-fn 6502  df-f 6503  df-f1 6504  df-fo 6505  df-f1o 6506  df-fv 6507  df-ov 7372  df-oprab 7373  df-mpo 7374  df-om 7823  df-2nd 7948  df-frecs 8237  df-wrecs 8268  df-recs 8317  df-rdg 8355  df-nn 12163  df-sets 17110  df-slot 17128  df-ndx 17140  df-base 17156  df-ress 17177  df-subg 19031  df-slw 19437

This theorem is referenced by:  sylow3lem6  19538