Theorem mulgpropdg 13814

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 3222	. . . . . . . . . . 11 ⊢ (𝐵 ⊆ 𝐾 → (𝑥 ∈ 𝐵 → 𝑥 ∈ 𝐾))
7		ssel 3222	. . . . . . . . . . 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 13520	. . . . . 6 ⊢ (𝜑 → (0g‘𝐺) = (0g‘𝐻))
14	13	3ad2ant1 1045	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (0g‘𝐺) = (0g‘𝐻))
15		1zzd 9550	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 1 ∈ ℤ)
16		nnuz 9836	. . . . . . . . 9 ⊢ ℕ = (ℤ≥‘1)
17	5	3ad2ant1 1045	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 𝐵 ⊆ 𝐾)
18		simp3 1026	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 𝑏 ∈ 𝐵)
19	17, 18	sseldd 3229	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → 𝑏 ∈ 𝐾)
20	16, 19	ialgrlemconst 12678	. . . . . . . 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 1186	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) ∈ 𝐾)
23	11	3ad2antl1 1186	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) ∧ (𝑥 ∈ 𝐾 ∧ 𝑦 ∈ 𝐾)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
24	15, 20, 22, 23	seqfeq3 10837	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → seq1((+g‘𝐺), (ℕ × {𝑏})) = seq1((+g‘𝐻), (ℕ × {𝑏})))
25	24	fveq1d 5650	. . . . . 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 13721	. . . . . . . 8 ⊢ (𝜑 → (invg‘𝐺) = (invg‘𝐻))
27	26	3ad2ant1 1045	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (invg‘𝐺) = (invg‘𝐻))
28	24	fveq1d 5650	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑎 ∈ ℤ ∧ 𝑏 ∈ 𝐵) → (seq1((+g‘𝐺), (ℕ × {𝑏}))‘-𝑎) = (seq1((+g‘𝐻), (ℕ × {𝑏}))‘-𝑎))
29	27, 28	fveq12d 5655	. . . . . 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 3629	. . . . 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 3629	. . . 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 6095	. . 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 2232	. . . 4 ⊢ (𝜑 → ℤ = ℤ)
34		eqidd 2232	. . . 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 6093	. . 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 2232	. . . 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 6093	. . 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 2272	. 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 2231	. . . . 5 ⊢ (Base‘𝐺) = (Base‘𝐺)
41		eqid 2231	. . . . 5 ⊢ (+g‘𝐺) = (+g‘𝐺)
42		eqid 2231	. . . . 5 ⊢ (0g‘𝐺) = (0g‘𝐺)
43		eqid 2231	. . . . 5 ⊢ (invg‘𝐺) = (invg‘𝐺)
44		eqid 2231	. . . . 5 ⊢ (.g‘𝐺) = (.g‘𝐺)
45	40, 41, 42, 43, 44	mulgfvalg 13771	. . . 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 2264	. 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 2231	. . . . 5 ⊢ (Base‘𝐻) = (Base‘𝐻)
50		eqid 2231	. . . . 5 ⊢ (+g‘𝐻) = (+g‘𝐻)
51		eqid 2231	. . . . 5 ⊢ (0g‘𝐻) = (0g‘𝐻)
52		eqid 2231	. . . . 5 ⊢ (invg‘𝐻) = (invg‘𝐻)
53		eqid 2231	. . . . 5 ⊢ (.g‘𝐻) = (.g‘𝐻)
54	49, 50, 51, 52, 53	mulgfvalg 13771	. . . 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 2264	. 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 2274	1 ⊢ (𝜑 → · = × )

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 1005   = wceq 1398   ∈ wcel 2202   ⊆ wss 3201  ifcif 3607  {csn 3673   class class class wbr 4093   × cxp 4729  ‘cfv 5333  (class class class)co 6028   ∈ cmpo 6030  0cc0 8075  1c1 8076   < clt 8256  -cneg 8393  ℕcn 9185  ℤcz 9523  seqcseq 10755  Basecbs 13145  +_gcplusg 13223  0_gc0g 13402  inv_gcminusg 13647  ._gcmg 13769

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4209  ax-sep 4212  ax-nul 4220  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-iinf 4692  ax-cnex 8166  ax-resscn 8167  ax-1cn 8168  ax-1re 8169  ax-icn 8170  ax-addcl 8171  ax-addrcl 8172  ax-mulcl 8173  ax-addcom 8175  ax-addass 8177  ax-distr 8179  ax-i2m1 8180  ax-0lt1 8181  ax-0id 8183  ax-rnegex 8184  ax-cnre 8186  ax-pre-ltirr 8187  ax-pre-ltwlin 8188  ax-pre-lttrn 8189  ax-pre-ltadd 8191

This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-nel 2499  df-ral 2516  df-rex 2517  df-reu 2518  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-nul 3497  df-if 3608  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-tr 4193  df-id 4396  df-iord 4469  df-on 4471  df-ilim 4472  df-suc 4474  df-iom 4695  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-f1 5338  df-fo 5339  df-f1o 5340  df-fv 5341  df-riota 5981  df-ov 6031  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313  df-recs 6514  df-frec 6600  df-pnf 8258  df-mnf 8259  df-xr 8260  df-ltxr 8261  df-le 8262  df-sub 8394  df-neg 8395  df-inn 9186  df-n0 9445  df-z 9524  df-uz 9800  df-seqfrec 10756  df-ndx 13148  df-slot 13149  df-base 13151  df-0g 13404  df-minusg 13650  df-mulg 13770

This theorem is referenced by:  mulgass3  14162