Theorem dprd2d2 19247

Description: The direct product of a collection of direct products. (Contributed by Mario Carneiro, 26-Apr-2016.)

Hypotheses

Ref	Expression
dprd2d2.1	⊢ ((𝜑 ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) → 𝑆 ∈ (SubGrp‘𝐺))
dprd2d2.2	⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → 𝐺dom DProd (𝑗 ∈ 𝐽 ↦ 𝑆))
dprd2d2.3	⊢ (𝜑 → 𝐺dom DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆))))

Assertion

Ref	Expression
dprd2d2	⊢ (𝜑 → (𝐺dom DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆) ∧ (𝐺 DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)) = (𝐺 DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆))))))

Distinct variable groups:   𝑖,𝑗,𝐺   𝑖,𝐼,𝑗   𝑗,𝐽   𝜑,𝑖,𝑗

Allowed substitution hints:   𝑆(𝑖,𝑗)   𝐽(𝑖)

Proof of Theorem dprd2d2

Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		relxp 5546	. . . . . 6 ⊢ Rel ({𝑖} × 𝐽)
2	1	rgenw 3082	. . . . 5 ⊢ ∀𝑖 ∈ 𝐼 Rel ({𝑖} × 𝐽)
3		reliun 5663	. . . . 5 ⊢ (Rel ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) ↔ ∀𝑖 ∈ 𝐼 Rel ({𝑖} × 𝐽))
4	2, 3	mpbir 234	. . . 4 ⊢ Rel ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽)
5	4	a1i 11	. . 3 ⊢ (𝜑 → Rel ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽))
6		dprd2d2.1	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) → 𝑆 ∈ (SubGrp‘𝐺))
7	6	ralrimivva 3120	. . . 4 ⊢ (𝜑 → ∀𝑖 ∈ 𝐼 ∀𝑗 ∈ 𝐽 𝑆 ∈ (SubGrp‘𝐺))
8		eqid 2758	. . . . 5 ⊢ (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆) = (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)
9	8	fmpox 7775	. . . 4 ⊢ (∀𝑖 ∈ 𝐼 ∀𝑗 ∈ 𝐽 𝑆 ∈ (SubGrp‘𝐺) ↔ (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆):∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽)⟶(SubGrp‘𝐺))
10	7, 9	sylib 221	. . 3 ⊢ (𝜑 → (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆):∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽)⟶(SubGrp‘𝐺))
11		dmiun 5759	. . . 4 ⊢ dom ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) = ∪ 𝑖 ∈ 𝐼 dom ({𝑖} × 𝐽)
12		dmxpss 6005	. . . . . . 7 ⊢ dom ({𝑖} × 𝐽) ⊆ {𝑖}
13		simpr 488	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → 𝑖 ∈ 𝐼)
14	13	snssd 4702	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → {𝑖} ⊆ 𝐼)
15	12, 14	sstrid 3905	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → dom ({𝑖} × 𝐽) ⊆ 𝐼)
16	15	ralrimiva 3113	. . . . 5 ⊢ (𝜑 → ∀𝑖 ∈ 𝐼 dom ({𝑖} × 𝐽) ⊆ 𝐼)
17		iunss 4937	. . . . 5 ⊢ (∪ 𝑖 ∈ 𝐼 dom ({𝑖} × 𝐽) ⊆ 𝐼 ↔ ∀𝑖 ∈ 𝐼 dom ({𝑖} × 𝐽) ⊆ 𝐼)
18	16, 17	sylibr 237	. . . 4 ⊢ (𝜑 → ∪ 𝑖 ∈ 𝐼 dom ({𝑖} × 𝐽) ⊆ 𝐼)
19	11, 18	eqsstrid 3942	. . 3 ⊢ (𝜑 → dom ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) ⊆ 𝐼)
20		dprd2d2.2	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → 𝐺dom DProd (𝑗 ∈ 𝐽 ↦ 𝑆))
21		simprl 770	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) → 𝑖 ∈ 𝐼)
22		simprr 772	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) → 𝑗 ∈ 𝐽)
23	8	ovmpt4g 7298	. . . . . . . . . 10 ⊢ ((𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽 ∧ 𝑆 ∈ (SubGrp‘𝐺)) → (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗) = 𝑆)
24	21, 22, 6, 23	syl3anc 1368	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) → (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗) = 𝑆)
25	24	anassrs 471	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝐼) ∧ 𝑗 ∈ 𝐽) → (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗) = 𝑆)
26	25	mpteq2dva 5131	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)) = (𝑗 ∈ 𝐽 ↦ 𝑆))
27	20, 26	breqtrrd 5064	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → 𝐺dom DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))
28	27	ralrimiva 3113	. . . . 5 ⊢ (𝜑 → ∀𝑖 ∈ 𝐼 𝐺dom DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))
29		nfcv 2919	. . . . . . 7 ⊢ Ⅎ𝑖𝐺
30		nfcv 2919	. . . . . . 7 ⊢ Ⅎ𝑖dom DProd
31		nfcsb1v 3831	. . . . . . . 8 ⊢ Ⅎ𝑖⦋𝑥 / 𝑖⦌𝐽
32		nfcv 2919	. . . . . . . . 9 ⊢ Ⅎ𝑖𝑥
33		nfmpo1 7234	. . . . . . . . 9 ⊢ Ⅎ𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)
34		nfcv 2919	. . . . . . . . 9 ⊢ Ⅎ𝑖𝑗
35	32, 33, 34	nfov 7186	. . . . . . . 8 ⊢ Ⅎ𝑖(𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)
36	31, 35	nfmpt 5133	. . . . . . 7 ⊢ Ⅎ𝑖(𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))
37	29, 30, 36	nfbr 5083	. . . . . 6 ⊢ Ⅎ𝑖 𝐺dom DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))
38		csbeq1a 3821	. . . . . . . 8 ⊢ (𝑖 = 𝑥 → 𝐽 = ⦋𝑥 / 𝑖⦌𝐽)
39		oveq1 7163	. . . . . . . 8 ⊢ (𝑖 = 𝑥 → (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗) = (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))
40	38, 39	mpteq12dv 5121	. . . . . . 7 ⊢ (𝑖 = 𝑥 → (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)) = (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))
41	40	breq2d 5048	. . . . . 6 ⊢ (𝑖 = 𝑥 → (𝐺dom DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)) ↔ 𝐺dom DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))))
42	37, 41	rspc 3531	. . . . 5 ⊢ (𝑥 ∈ 𝐼 → (∀𝑖 ∈ 𝐼 𝐺dom DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)) → 𝐺dom DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))))
43	28, 42	mpan9 510	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → 𝐺dom DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))
44		nfcv 2919	. . . . . 6 ⊢ Ⅎ𝑦(𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)
45		nfcv 2919	. . . . . . 7 ⊢ Ⅎ𝑗𝑥
46		nfmpo2 7235	. . . . . . 7 ⊢ Ⅎ𝑗(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)
47		nfcv 2919	. . . . . . 7 ⊢ Ⅎ𝑗𝑦
48	45, 46, 47	nfov 7186	. . . . . 6 ⊢ Ⅎ𝑗(𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)
49		oveq2 7164	. . . . . 6 ⊢ (𝑗 = 𝑦 → (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗) = (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦))
50	44, 48, 49	cbvmpt 5137	. . . . 5 ⊢ (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)) = (𝑦 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦))
51		nfv 1915	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑖 𝑗 = 𝑧
52	31	nfcri 2906	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑖 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽
53	51, 52	nfan 1900	. . . . . . . . . . . 12 ⊢ Ⅎ𝑖(𝑗 = 𝑧 ∧ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽)
54	38	eleq2d 2837	. . . . . . . . . . . . 13 ⊢ (𝑖 = 𝑥 → (𝑗 ∈ 𝐽 ↔ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽))
55	54	anbi2d 631	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑥 → ((𝑗 = 𝑧 ∧ 𝑗 ∈ 𝐽) ↔ (𝑗 = 𝑧 ∧ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽)))
56	53, 55	equsexv 2266	. . . . . . . . . . 11 ⊢ (∃𝑖(𝑖 = 𝑥 ∧ (𝑗 = 𝑧 ∧ 𝑗 ∈ 𝐽)) ↔ (𝑗 = 𝑧 ∧ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽))
57		simprl 770	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐼) ∧ (𝑖 = 𝑥 ∧ 𝑗 = 𝑧)) → 𝑖 = 𝑥)
58		simplr 768	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐼) ∧ (𝑖 = 𝑥 ∧ 𝑗 = 𝑧)) → 𝑥 ∈ 𝐼)
59	57, 58	eqeltrd 2852	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐼) ∧ (𝑖 = 𝑥 ∧ 𝑗 = 𝑧)) → 𝑖 ∈ 𝐼)
60	59	biantrurd 536	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐼) ∧ (𝑖 = 𝑥 ∧ 𝑗 = 𝑧)) → (𝑗 ∈ 𝐽 ↔ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)))
61	60	pm5.32da 582	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (((𝑖 = 𝑥 ∧ 𝑗 = 𝑧) ∧ 𝑗 ∈ 𝐽) ↔ ((𝑖 = 𝑥 ∧ 𝑗 = 𝑧) ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽))))
62		anass 472	. . . . . . . . . . . . 13 ⊢ (((𝑖 = 𝑥 ∧ 𝑗 = 𝑧) ∧ 𝑗 ∈ 𝐽) ↔ (𝑖 = 𝑥 ∧ (𝑗 = 𝑧 ∧ 𝑗 ∈ 𝐽)))
63		eqcom 2765	. . . . . . . . . . . . . . 15 ⊢ (⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ↔ ⟨𝑖, 𝑗⟩ = ⟨𝑥, 𝑧⟩)
64		vex 3413	. . . . . . . . . . . . . . . 16 ⊢ 𝑖 ∈ V
65		vex 3413	. . . . . . . . . . . . . . . 16 ⊢ 𝑗 ∈ V
66	64, 65	opth 5340	. . . . . . . . . . . . . . 15 ⊢ (⟨𝑖, 𝑗⟩ = ⟨𝑥, 𝑧⟩ ↔ (𝑖 = 𝑥 ∧ 𝑗 = 𝑧))
67	63, 66	bitr2i 279	. . . . . . . . . . . . . 14 ⊢ ((𝑖 = 𝑥 ∧ 𝑗 = 𝑧) ↔ ⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩)
68	67	anbi1i 626	. . . . . . . . . . . . 13 ⊢ (((𝑖 = 𝑥 ∧ 𝑗 = 𝑧) ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) ↔ (⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)))
69	61, 62, 68	3bitr3g 316	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → ((𝑖 = 𝑥 ∧ (𝑗 = 𝑧 ∧ 𝑗 ∈ 𝐽)) ↔ (⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽))))
70	69	exbidv 1922	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (∃𝑖(𝑖 = 𝑥 ∧ (𝑗 = 𝑧 ∧ 𝑗 ∈ 𝐽)) ↔ ∃𝑖(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽))))
71	56, 70	bitr3id 288	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → ((𝑗 = 𝑧 ∧ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽) ↔ ∃𝑖(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽))))
72	71	exbidv 1922	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (∃𝑗(𝑗 = 𝑧 ∧ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽) ↔ ∃𝑗∃𝑖(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽))))
73		vex 3413	. . . . . . . . . 10 ⊢ 𝑧 ∈ V
74		eleq1w 2834	. . . . . . . . . 10 ⊢ (𝑗 = 𝑧 → (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↔ 𝑧 ∈ ⦋𝑥 / 𝑖⦌𝐽))
75	73, 74	ceqsexv 3460	. . . . . . . . 9 ⊢ (∃𝑗(𝑗 = 𝑧 ∧ 𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽) ↔ 𝑧 ∈ ⦋𝑥 / 𝑖⦌𝐽)
76		excom 2166	. . . . . . . . 9 ⊢ (∃𝑗∃𝑖(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)) ↔ ∃𝑖∃𝑗(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)))
77	72, 75, 76	3bitr3g 316	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (𝑧 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↔ ∃𝑖∃𝑗(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽))))
78		elrelimasn 5930	. . . . . . . . . 10 ⊢ (Rel ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) → (𝑧 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↔ 𝑥∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽)𝑧))
79	4, 78	ax-mp 5	. . . . . . . . 9 ⊢ (𝑧 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↔ 𝑥∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽)𝑧)
80		df-br 5037	. . . . . . . . 9 ⊢ (𝑥∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽)𝑧 ↔ ⟨𝑥, 𝑧⟩ ∈ ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽))
81		eliunxp 5683	. . . . . . . . 9 ⊢ (⟨𝑥, 𝑧⟩ ∈ ∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) ↔ ∃𝑖∃𝑗(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)))
82	79, 80, 81	3bitri 300	. . . . . . . 8 ⊢ (𝑧 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↔ ∃𝑖∃𝑗(⟨𝑥, 𝑧⟩ = ⟨𝑖, 𝑗⟩ ∧ (𝑖 ∈ 𝐼 ∧ 𝑗 ∈ 𝐽)))
83	77, 82	bitr4di 292	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (𝑧 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↔ 𝑧 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥})))
84	83	eqrdv 2756	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → ⦋𝑥 / 𝑖⦌𝐽 = (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}))
85	84	mpteq1d 5125	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (𝑦 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)) = (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))
86	50, 85	syl5eq 2805	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)) = (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))
87	43, 86	breqtrd 5062	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → 𝐺dom DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))
88		dprd2d2.3	. . . . 5 ⊢ (𝜑 → 𝐺dom DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆))))
89	26	oveq2d 7172	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝐼) → (𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))) = (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆)))
90	89	mpteq2dva 5131	. . . . 5 ⊢ (𝜑 → (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))) = (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆))))
91	88, 90	breqtrrd 5064	. . . 4 ⊢ (𝜑 → 𝐺dom DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))))
92		nfcv 2919	. . . . . 6 ⊢ Ⅎ𝑥(𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))
93		nfcv 2919	. . . . . . 7 ⊢ Ⅎ𝑖 DProd
94	29, 93, 36	nfov 7186	. . . . . 6 ⊢ Ⅎ𝑖(𝐺 DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))
95	40	oveq2d 7172	. . . . . 6 ⊢ (𝑖 = 𝑥 → (𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))) = (𝐺 DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))))
96	92, 94, 95	cbvmpt 5137	. . . . 5 ⊢ (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))) = (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))))
97	86	oveq2d 7172	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐼) → (𝐺 DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗))) = (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦))))
98	97	mpteq2dva 5131	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ ⦋𝑥 / 𝑖⦌𝐽 ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))) = (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))))
99	96, 98	syl5eq 2805	. . . 4 ⊢ (𝜑 → (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ (𝑖(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑗)))) = (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))))
100	91, 99	breqtrd 5062	. . 3 ⊢ (𝜑 → 𝐺dom DProd (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))))
101		eqid 2758	. . 3 ⊢ (mrCls‘(SubGrp‘𝐺)) = (mrCls‘(SubGrp‘𝐺))
102	5, 10, 19, 87, 100, 101	dprd2da 19245	. 2 ⊢ (𝜑 → 𝐺dom DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆))
103	5, 10, 19, 87, 100, 101	dprd2db 19246	. . 3 ⊢ (𝜑 → (𝐺 DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)) = (𝐺 DProd (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦))))))
104	99, 90	eqtr3d 2795	. . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦)))) = (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆))))
105	104	oveq2d 7172	. . 3 ⊢ (𝜑 → (𝐺 DProd (𝑥 ∈ 𝐼 ↦ (𝐺 DProd (𝑦 ∈ (∪ 𝑖 ∈ 𝐼 ({𝑖} × 𝐽) “ {𝑥}) ↦ (𝑥(𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)𝑦))))) = (𝐺 DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆)))))
106	103, 105	eqtrd 2793	. 2 ⊢ (𝜑 → (𝐺 DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)) = (𝐺 DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆)))))
107	102, 106	jca 515	1 ⊢ (𝜑 → (𝐺dom DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆) ∧ (𝐺 DProd (𝑖 ∈ 𝐼, 𝑗 ∈ 𝐽 ↦ 𝑆)) = (𝐺 DProd (𝑖 ∈ 𝐼 ↦ (𝐺 DProd (𝑗 ∈ 𝐽 ↦ 𝑆))))))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1538  ∃wex 1781   ∈ wcel 2111  ∀wral 3070  ⦋csb 3807   ⊆ wss 3860  {csn 4525  ⟨cop 4531  ∪ ciun 4886   class class class wbr 5036   ↦ cmpt 5116   × cxp 5526  dom cdm 5528   “ cima 5531  Rel wrel 5533  ⟶wf 6336  ‘cfv 6340  (class class class)co 7156   ∈ cmpo 7158  mrClscmrc 16925  SubGrpcsubg 18353   DProd cdprd 19196

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-rep 5160  ax-sep 5173  ax-nul 5180  ax-pow 5238  ax-pr 5302  ax-un 7465  ax-cnex 10644  ax-resscn 10645  ax-1cn 10646  ax-icn 10647  ax-addcl 10648  ax-addrcl 10649  ax-mulcl 10650  ax-mulrcl 10651  ax-mulcom 10652  ax-addass 10653  ax-mulass 10654  ax-distr 10655  ax-i2m1 10656  ax-1ne0 10657  ax-1rid 10658  ax-rnegex 10659  ax-rrecex 10660  ax-cnre 10661  ax-pre-lttri 10662  ax-pre-lttrn 10663  ax-pre-ltadd 10664  ax-pre-mulgt0 10665

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ne 2952  df-nel 3056  df-ral 3075  df-rex 3076  df-reu 3077  df-rmo 3078  df-rab 3079  df-v 3411  df-sbc 3699  df-csb 3808  df-dif 3863  df-un 3865  df-in 3867  df-ss 3877  df-pss 3879  df-nul 4228  df-if 4424  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4802  df-int 4842  df-iun 4888  df-iin 4889  df-br 5037  df-opab 5099  df-mpt 5117  df-tr 5143  df-id 5434  df-eprel 5439  df-po 5447  df-so 5448  df-fr 5487  df-se 5488  df-we 5489  df-xp 5534  df-rel 5535  df-cnv 5536  df-co 5537  df-dm 5538  df-rn 5539  df-res 5540  df-ima 5541  df-pred 6131  df-ord 6177  df-on 6178  df-lim 6179  df-suc 6180  df-iota 6299  df-fun 6342  df-fn 6343  df-f 6344  df-f1 6345  df-fo 6346  df-f1o 6347  df-fv 6348  df-isom 6349  df-riota 7114  df-ov 7159  df-oprab 7160  df-mpo 7161  df-of 7411  df-om 7586  df-1st 7699  df-2nd 7700  df-supp 7842  df-tpos 7908  df-wrecs 7963  df-recs 8024  df-rdg 8062  df-1o 8118  df-er 8305  df-map 8424  df-ixp 8493  df-en 8541  df-dom 8542  df-sdom 8543  df-fin 8544  df-fsupp 8880  df-oi 9020  df-card 9414  df-pnf 10728  df-mnf 10729  df-xr 10730  df-ltxr 10731  df-le 10732  df-sub 10923  df-neg 10924  df-nn 11688  df-2 11750  df-n0 11948  df-z 12034  df-uz 12296  df-fz 12953  df-fzo 13096  df-seq 13432  df-hash 13754  df-ndx 16557  df-slot 16558  df-base 16560  df-sets 16561  df-ress 16562  df-plusg 16649  df-0g 16786  df-gsum 16787  df-mre 16928  df-mrc 16929  df-acs 16931  df-mgm 17931  df-sgrp 17980  df-mnd 17991  df-mhm 18035  df-submnd 18036  df-grp 18185  df-minusg 18186  df-sbg 18187  df-mulg 18305  df-subg 18356  df-ghm 18436  df-gim 18479  df-cntz 18527  df-oppg 18554  df-lsm 18841  df-cmn 18988  df-dprd 19198

This theorem is referenced by:  ablfaclem2  19289