Theorem mgpress 14232

Description: Subgroup commutes with the multiplicative group operator. (Contributed by Mario Carneiro, 10-Jan-2015.) (Proof shortened by AV, 18-Oct-2024.)

Hypotheses

Ref	Expression
mgpress.1	⊢ 𝑆 = (𝑅 ↾s 𝐴)
mgpress.2	⊢ 𝑀 = (mulGrp‘𝑅)

Assertion

Ref	Expression
mgpress	⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑀 ↾s 𝐴) = (mulGrp‘𝑆))

Proof of Theorem mgpress

Step	Hyp	Ref	Expression
1		mgpress.2	. . . . 5 ⊢ 𝑀 = (mulGrp‘𝑅)
2		eqid 2238	. . . . 5 ⊢ (.r‘𝑅) = (.r‘𝑅)
3	1, 2	mgpvalg 14222	. . . 4 ⊢ (𝑅 ∈ 𝑉 → 𝑀 = (𝑅 sSet ⟨(+g‘ndx), (.r‘𝑅)⟩))
4	3	adantr 276	. . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → 𝑀 = (𝑅 sSet ⟨(+g‘ndx), (.r‘𝑅)⟩))
5	4	oveq1d 6100	. 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑀 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩) = ((𝑅 sSet ⟨(+g‘ndx), (.r‘𝑅)⟩) sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩))
6	1	mgpex 14225	. . . 4 ⊢ (𝑅 ∈ 𝑉 → 𝑀 ∈ V)
7		ressvalsets 13420	. . . 4 ⊢ ((𝑀 ∈ V ∧ 𝐴 ∈ 𝑊) → (𝑀 ↾s 𝐴) = (𝑀 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑀))⟩))
8	6, 7	sylan 283	. . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑀 ↾s 𝐴) = (𝑀 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑀))⟩))
9		eqid 2238	. . . . . . . 8 ⊢ (Base‘𝑅) = (Base‘𝑅)
10	1, 9	mgpbasg 14226	. . . . . . 7 ⊢ (𝑅 ∈ 𝑉 → (Base‘𝑅) = (Base‘𝑀))
11	10	adantr 276	. . . . . 6 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (Base‘𝑅) = (Base‘𝑀))
12	11	ineq2d 3432	. . . . 5 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝐴 ∩ (Base‘𝑅)) = (𝐴 ∩ (Base‘𝑀)))
13	12	opeq2d 3911	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩ = ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑀))⟩)
14	13	oveq2d 6101	. . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑀 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩) = (𝑀 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑀))⟩))
15	8, 14	eqtr4d 2274	. 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑀 ↾s 𝐴) = (𝑀 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩))
16		mgpress.1	. . . . 5 ⊢ 𝑆 = (𝑅 ↾s 𝐴)
17		ressvalsets 13420	. . . . 5 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑅 ↾s 𝐴) = (𝑅 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩))
18	16, 17	eqtrid 2283	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → 𝑆 = (𝑅 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩))
19	16, 2	ressmulrg 13501	. . . . . . 7 ⊢ ((𝐴 ∈ 𝑊 ∧ 𝑅 ∈ 𝑉) → (.r‘𝑅) = (.r‘𝑆))
20	19	ancoms 268	. . . . . 6 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (.r‘𝑅) = (.r‘𝑆))
21	20	eqcomd 2244	. . . . 5 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (.r‘𝑆) = (.r‘𝑅))
22	21	opeq2d 3911	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → ⟨(+g‘ndx), (.r‘𝑆)⟩ = ⟨(+g‘ndx), (.r‘𝑅)⟩)
23	18, 22	oveq12d 6103	. . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑆 sSet ⟨(+g‘ndx), (.r‘𝑆)⟩) = ((𝑅 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩) sSet ⟨(+g‘ndx), (.r‘𝑅)⟩))
24		ressex 13421	. . . . 5 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑅 ↾s 𝐴) ∈ V)
25	16, 24	eqeltrid 2325	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → 𝑆 ∈ V)
26		eqid 2238	. . . . 5 ⊢ (mulGrp‘𝑆) = (mulGrp‘𝑆)
27		eqid 2238	. . . . 5 ⊢ (.r‘𝑆) = (.r‘𝑆)
28	26, 27	mgpvalg 14222	. . . 4 ⊢ (𝑆 ∈ V → (mulGrp‘𝑆) = (𝑆 sSet ⟨(+g‘ndx), (.r‘𝑆)⟩))
29	25, 28	syl 14	. . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (mulGrp‘𝑆) = (𝑆 sSet ⟨(+g‘ndx), (.r‘𝑆)⟩))
30		plusgslid 13468	. . . . . 6 ⊢ (+g = Slot (+g‘ndx) ∧ (+g‘ndx) ∈ ℕ)
31	30	simpri 113	. . . . 5 ⊢ (+g‘ndx) ∈ ℕ
32	31	a1i 9	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (+g‘ndx) ∈ ℕ)
33		basendxnn 13410	. . . . 5 ⊢ (Base‘ndx) ∈ ℕ
34	33	a1i 9	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (Base‘ndx) ∈ ℕ)
35		simpl 109	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → 𝑅 ∈ 𝑉)
36		basendxnplusgndx 13481	. . . . . 6 ⊢ (Base‘ndx) ≠ (+g‘ndx)
37	36	necomi 2505	. . . . 5 ⊢ (+g‘ndx) ≠ (Base‘ndx)
38	37	a1i 9	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (+g‘ndx) ≠ (Base‘ndx))
39		mulrslid 13488	. . . . . 6 ⊢ (.r = Slot (.r‘ndx) ∧ (.r‘ndx) ∈ ℕ)
40	39	slotex 13381	. . . . 5 ⊢ (𝑅 ∈ 𝑉 → (.r‘𝑅) ∈ V)
41	40	adantr 276	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (.r‘𝑅) ∈ V)
42		inex1g 4269	. . . . 5 ⊢ (𝐴 ∈ 𝑊 → (𝐴 ∩ (Base‘𝑅)) ∈ V)
43	42	adantl 277	. . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝐴 ∩ (Base‘𝑅)) ∈ V)
44	32, 34, 35, 38, 41, 43	setscomd 13395	. . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → ((𝑅 sSet ⟨(+g‘ndx), (.r‘𝑅)⟩) sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩) = ((𝑅 sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩) sSet ⟨(+g‘ndx), (.r‘𝑅)⟩))
45	23, 29, 44	3eqtr4d 2281	. 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (mulGrp‘𝑆) = ((𝑅 sSet ⟨(+g‘ndx), (.r‘𝑅)⟩) sSet ⟨(Base‘ndx), (𝐴 ∩ (Base‘𝑅))⟩))
46	5, 15, 45	3eqtr4d 2281	1 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑀 ↾s 𝐴) = (mulGrp‘𝑆))

This proof depends on syntax axioms:   → wi 4   ∧ wa 104   = wceq 1402   ∈ wcel 2209   ≠ wne 2420  Vcvv 2821   ∩ cin 3219  ⟨cop 3712  ‘cfv 5377  (class class class)co 6085  ℕcn 9305  ndxcnx 13351   sSet csts 13352  Slot cslot 13353  Basecbs 13354   ↾_s cress 13355  +_gcplusg 13433  ._rcmulr 13434  mulGrpcmgp 14219

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1cn 8272  ax-1re 8273  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-addcom 8279  ax-addass 8281  ax-i2m1 8284  ax-0lt1 8285  ax-0id 8287  ax-rnegex 8288  ax-pre-ltirr 8291  ax-pre-lttrn 8293  ax-pre-ltadd 8295

This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-iota 5337  df-fun 5379  df-fn 5380  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-pnf 8362  df-mnf 8363  df-ltxr 8365  df-inn 9306  df-2 9364  df-3 9365  df-ndx 13357  df-slot 13358  df-base 13360  df-sets 13361  df-iress 13362  df-plusg 13446  df-mulr 13447  df-mgp 14220

This theorem is used by:  rdivmuldivd  14453  subrgcrng  14535  subrgsubm  14544  resrhm  14558  resrhm2b  14559  zringmpg  14943