Theorem mulgpropdg 13237

Description: Two structures with the same group-nature have the same group multiple function. 𝐾 is expected to either be V (when strong equality is available) or 𝐵 (when closure is available). (Contributed by Stefan O'Rear, 21-Mar-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)

Hypotheses

Ref	Expression
mulgpropdg.m	⊢ (𝜑 → · = (.g‘𝐺))
mulgpropdg.n	⊢ (𝜑 → × = (.g‘𝐻))
mulgpropdg.g	⊢ (𝜑 → 𝐺 ∈ 𝑉)
mulgpropdg.h	⊢ (𝜑 → 𝐻 ∈ 𝑊)
mulgpropd.b1	⊢ (𝜑 → 𝐵 = (Base‘𝐺))
mulgpropd.b2	⊢ (𝜑 → 𝐵 = (Base‘𝐻))
mulgpropd.i	⊢ (𝜑 → 𝐵 ⊆ 𝐾)
mulgpropd.k	⊢ ((𝜑 ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐾)
mulgpropd.e	⊢ ((𝜑 ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))

Assertion

Ref	Expression
mulgpropdg	⊢ (𝜑 → · = × )

Distinct variable groups:   𝜑,𝑥,𝑦   𝑥,𝐵,𝑦   𝑥,𝐺,𝑦   𝑥,𝐻,𝑦   𝑥,𝐾,𝑦

Allowed substitution hints:   · (𝑥,𝑦)   × (𝑥,𝑦)   𝑉(𝑥,𝑦)   𝑊(𝑥,𝑦)

Proof of Theorem mulgpropdg

Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mulgpropd.b1	. . . . . . 7 ⊢ (𝜑 → 𝐵 = (Base‘𝐺))
2		mulgpropd.b2	. . . . . . 7 ⊢ (𝜑 → 𝐵 = (Base‘𝐻))
3		mulgpropdg.g	. . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ 𝑉)
4		mulgpropdg.h	. . . . . . 7 ⊢ (𝜑 → 𝐻 ∈ 𝑊)
5		mulgpropd.i	. . . . . . . . . 10 ⊢ (𝜑 → 𝐵 ⊆ 𝐾)
6		ssel 3174	. . . . . . . . . . 11 ⊢ (𝐵 ⊆ 𝐾 → (𝑥 ∈ 𝐵 → 𝑥 ∈ 𝐾))
7		ssel 3174	. . . . . . . . . . 11 ⊢ (𝐵 ⊆ 𝐾 → (𝑦 ∈ 𝐵 → 𝑦 ∈ 𝐾))
8	6, 7	anim12d 335	. . . . . . . . . 10 ⊢ (𝐵 ⊆ 𝐾 → ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)))
9	5, 8	syl 14	. . . . . . . . 9 ⊢ (𝜑 → ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)))
10	9	imp 124	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾))
11		mulgpropd.e	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
12	10, 11	syldan 282	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
13	1, 2, 3, 4, 12	grpidpropdg 12960	. . . . . 6 ⊢ (𝜑 → (0g‘𝐺) = (0g‘𝐻))
14	13	3ad2ant1 1020	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (0g‘𝐺) = (0g‘𝐻))
15		1zzd 9347	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 1 ∈ ℤ)
16		nnuz 9631	. . . . . . . . 9 ⊢ ℕ = (ℤ≥‘1)
17	5	3ad2ant1 1020	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 𝐵 ⊆ 𝐾)
18		simp3 1001	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 𝑏 ∈ 𝐵)
19	17, 18	sseldd 3181	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 𝑏 ∈ 𝐾)
20	16, 19	ialgrlemconst 12184	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) ∧ 𝑥 ∈ (ℤ≥‘1)) → ((ℕ × {𝑏})‘𝑥) ∈ 𝐾)
21		mulgpropd.k	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐾)
22	21	3ad2antl1 1161	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐾)
23	11	3ad2antl1 1161	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
24	15, 20, 22, 23	seqfeq3 10603	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → seq1((+g‘𝐺), (ℕ × {𝑏})) = seq1((+g‘𝐻), (ℕ × {𝑏})))
25	24	fveq1d 5557	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎) = (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎))
26	1, 2, 3, 4, 12	grpinvpropdg 13150	. . . . . . . 8 ⊢ (𝜑 → (invg‘𝐺) = (invg‘𝐻))
27	26	3ad2ant1 1020	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (invg‘𝐺) = (invg‘𝐻))
28	24	fveq1d 5557	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎) = (seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))
29	27, 28	fveq12d 5562	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎)) = ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎)))
30	25, 29	ifeq12d 3577	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))) = if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))
31	14, 30	ifeq12d 3577	. . . 4 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎)))) = if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎)))))
32	31	mpoeq3dva 5983	. . 3 ⊢ (𝜑 → (𝑎 ∈ ℤ, 𝑏 ∈ 𝐵 ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))) = (𝑎 ∈ ℤ, 𝑏 ∈ 𝐵 ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))))
33		eqidd 2194	. . . 4 ⊢ (𝜑 → ℤ = ℤ)
34		eqidd 2194	. . . 4 ⊢ (𝜑 → if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎)))) = if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎)))))
35	33, 1, 34	mpoeq123dv 5981	. . 3 ⊢ (𝜑 → (𝑎 ∈ ℤ, 𝑏 ∈ 𝐵 ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐺) ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))))
36		eqidd 2194	. . . 4 ⊢ (𝜑 → if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎)))) = if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎)))))
37	33, 2, 36	mpoeq123dv 5981	. . 3 ⊢ (𝜑 → (𝑎 ∈ ℤ, 𝑏 ∈ 𝐵 ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐻) ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))))
38	32, 35, 37	3eqtr3d 2234	. 2 ⊢ (𝜑 → (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐺) ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐻) ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))))
39		mulgpropdg.m	. . 3 ⊢ (𝜑 → · = (.g‘𝐺))
40		eqid 2193	. . . . 5 ⊢ (Base‘𝐺) = (Base‘𝐺)
41		eqid 2193	. . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺)
42		eqid 2193	. . . . 5 ⊢ (0g‘𝐺) = (0g‘𝐺)
43		eqid 2193	. . . . 5 ⊢ (invg‘𝐺) = (invg‘𝐺)
44		eqid 2193	. . . . 5 ⊢ (.g‘𝐺) = (.g‘𝐺)
45	40, 41, 42, 43, 44	mulgfvalg 13194	. . . 4 ⊢ (𝐺 ∈ 𝑉 → (.g‘𝐺) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐺) ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))))
46	3, 45	syl 14	. . 3 ⊢ (𝜑 → (.g‘𝐺) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐺) ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))))
47	39, 46	eqtrd 2226	. 2 ⊢ (𝜑 → · = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐺) ↦ if(𝑎 = 0, (0g‘𝐺), if(0 < 𝑎, (seq1((+g‘𝐺), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎))))))
48		mulgpropdg.n	. . 3 ⊢ (𝜑 → × = (.g‘𝐻))
49		eqid 2193	. . . . 5 ⊢ (Base‘𝐻) = (Base‘𝐻)
50		eqid 2193	. . . . 5 ⊢ (+g‘𝐻) = (+g‘𝐻)
51		eqid 2193	. . . . 5 ⊢ (0g‘𝐻) = (0g‘𝐻)
52		eqid 2193	. . . . 5 ⊢ (invg‘𝐻) = (invg‘𝐻)
53		eqid 2193	. . . . 5 ⊢ (.g‘𝐻) = (.g‘𝐻)
54	49, 50, 51, 52, 53	mulgfvalg 13194	. . . 4 ⊢ (𝐻 ∈ 𝑊 → (.g‘𝐻) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐻) ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))))
55	4, 54	syl 14	. . 3 ⊢ (𝜑 → (.g‘𝐻) = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐻) ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))))
56	48, 55	eqtrd 2226	. 2 ⊢ (𝜑 → × = (𝑎 ∈ ℤ, 𝑏 ∈ (Base‘𝐻) ↦ if(𝑎 = 0, (0g‘𝐻), if(0 < 𝑎, (seq1((+g‘𝐻), (ℕ × {𝑏}))‘𝑎), ((invg‘𝐻)‘(seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))))))
57	38, 47, 56	3eqtr4d 2236	1 ⊢ (𝜑 → · = × )

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 980   = wceq 1364   ∈ wcel 2164   ⊆ wss 3154  ifcif 3558  {csn 3619   class class class wbr 4030   × cxp 4658  ‘cfv 5255  (class class class)co 5919   ∈ cmpo 5921  0cc0 7874  1c1 7875   < clt 8056  -cneg 8193  ℕcn 8984  ℤcz 9320  seqcseq 10521  Basecbs 12621  +_gcplusg 12698  0_gc0g 12870  inv_gcminusg 13076  ._gcmg 13192

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-coll 4145  ax-sep 4148  ax-nul 4156  ax-pow 4204  ax-pr 4239  ax-un 4465  ax-setind 4570  ax-iinf 4621  ax-cnex 7965  ax-resscn 7966  ax-1cn 7967  ax-1re 7968  ax-icn 7969  ax-addcl 7970  ax-addrcl 7971  ax-mulcl 7972  ax-addcom 7974  ax-addass 7976  ax-distr 7978  ax-i2m1 7979  ax-0lt1 7980  ax-0id 7982  ax-rnegex 7983  ax-cnre 7985  ax-pre-ltirr 7986  ax-pre-ltwlin 7987  ax-pre-lttrn 7988  ax-pre-ltadd 7990

This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-reu 2479  df-rab 2481  df-v 2762  df-sbc 2987  df-csb 3082  df-dif 3156  df-un 3158  df-in 3160  df-ss 3167  df-nul 3448  df-if 3559  df-pw 3604  df-sn 3625  df-pr 3626  df-op 3628  df-uni 3837  df-int 3872  df-iun 3915  df-br 4031  df-opab 4092  df-mpt 4093  df-tr 4129  df-id 4325  df-iord 4398  df-on 4400  df-ilim 4401  df-suc 4403  df-iom 4624  df-xp 4666  df-rel 4667  df-cnv 4668  df-co 4669  df-dm 4670  df-rn 4671  df-res 4672  df-ima 4673  df-iota 5216  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-riota 5874  df-ov 5922  df-oprab 5923  df-mpo 5924  df-1st 6195  df-2nd 6196  df-recs 6360  df-frec 6446  df-pnf 8058  df-mnf 8059  df-xr 8060  df-ltxr 8061  df-le 8062  df-sub 8194  df-neg 8195  df-inn 8985  df-n0 9244  df-z 9321  df-uz 9596  df-seqfrec 10522  df-ndx 12624  df-slot 12625  df-base 12627  df-0g 12872  df-minusg 13079  df-mulg 13193

This theorem is referenced by:  mulgass3  13584