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Theorem mdetunilem6 20242

Description: Lemma for mdetuni 20247. (Contributed by SO, 15-Jul-2018.)

**Hypotheses**
Ref	Expression
mdetuni.a	⊢ 𝐴 = (𝑁 Mat 𝑅)
mdetuni.b	⊢ 𝐵 = (Base‘𝐴)
mdetuni.k	⊢ 𝐾 = (Base‘𝑅)
mdetuni.0g	⊢ 0 = (0_g‘𝑅)
mdetuni.1r	⊢ 1 = (1_r‘𝑅)
mdetuni.pg	⊢ + = (+_g‘𝑅)
mdetuni.tg	⊢ · = (._r‘𝑅)
mdetuni.n	⊢ (𝜑 → 𝑁 ∈ Fin)
mdetuni.r	⊢ (𝜑 → 𝑅 ∈ Ring)
mdetuni.ff	⊢ (𝜑 → 𝐷:𝐵⟶𝐾)
mdetuni.al	⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝑁 ∀𝑧 ∈ 𝑁 ((𝑦 ≠ 𝑧 ∧ ∀𝑤 ∈ 𝑁 (𝑦𝑥𝑤) = (𝑧𝑥𝑤)) → (𝐷‘𝑥) = 0 ))
mdetuni.li	⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑤 ∈ 𝑁 (((𝑥 ↾ ({𝑤} × 𝑁)) = ((𝑦 ↾ ({𝑤} × 𝑁)) ∘_𝑓 + (𝑧 ↾ ({𝑤} × 𝑁))) ∧ (𝑥 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) = (𝑦 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) ∧ (𝑥 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) = (𝑧 ↾ ((𝑁 ∖ {𝑤}) × 𝑁))) → (𝐷‘𝑥) = ((𝐷‘𝑦) + (𝐷‘𝑧))))
mdetuni.sc	⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐾 ∀𝑧 ∈ 𝐵 ∀𝑤 ∈ 𝑁 (((𝑥 ↾ ({𝑤} × 𝑁)) = ((({𝑤} × 𝑁) × {𝑦}) ∘_𝑓 · (𝑧 ↾ ({𝑤} × 𝑁))) ∧ (𝑥 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) = (𝑧 ↾ ((𝑁 ∖ {𝑤}) × 𝑁))) → (𝐷‘𝑥) = (𝑦 · (𝐷‘𝑧))))
mdetunilem6.ph	⊢ (𝜓 → 𝜑)
mdetunilem6.ef	⊢ (𝜓 → (𝐸 ∈ 𝑁 ∧ 𝐹 ∈ 𝑁 ∧ 𝐸 ≠ 𝐹))
mdetunilem6.gh	⊢ ((𝜓 ∧ 𝑏 ∈ 𝑁) → (𝐺 ∈ 𝐾 ∧ 𝐻 ∈ 𝐾))
mdetunilem6.i	⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → 𝐼 ∈ 𝐾)

**Assertion**
Ref	Expression
mdetunilem6	⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) = ((inv_g‘𝑅)‘(𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))))))

Distinct variable groups: 𝜑,𝑥,𝑦,𝑧,𝑤,𝑎,𝑏 𝑥,𝐵,𝑦,𝑧,𝑤,𝑎,𝑏 𝑥,𝐾,𝑦,𝑧,𝑤,𝑎,𝑏 𝑥,𝑁,𝑦,𝑧,𝑤,𝑎,𝑏 𝑥,𝐷,𝑦,𝑧,𝑤,𝑎,𝑏 𝑥, · ,𝑦,𝑧,𝑤 + ,𝑎,𝑏,𝑥,𝑦,𝑧,𝑤 0 ,𝑎,𝑏,𝑥,𝑦,𝑧,𝑤 1 ,𝑎,𝑏,𝑥,𝑦,𝑧,𝑤 𝑥,𝑅,𝑦,𝑧,𝑤 𝐴,𝑎,𝑏,𝑥,𝑦,𝑧,𝑤 𝑥,𝐸,𝑦,𝑧,𝑤 𝑥,𝐹,𝑦,𝑧,𝑤 𝑥,𝐺,𝑦,𝑧,𝑤 𝑥,𝐻,𝑦,𝑧,𝑤 𝜓,𝑎,𝑏,𝑥,𝑦,𝑧,𝑤 𝐸,𝑎,𝑏 𝐹,𝑎,𝑏 𝐺,𝑎 𝐻,𝑎 𝑥,𝐼,𝑦,𝑧,𝑤 Allowed substitution hints: 𝑅(𝑎,𝑏) · (𝑎,𝑏) 𝐺(𝑏) 𝐻(𝑏) 𝐼(𝑎,𝑏)

**Proof of Theorem mdetunilem6**
Step	Hyp	Ref	Expression
1		mdetuni.a	. . . . 5 ⊢ 𝐴 = (𝑁 Mat 𝑅)
2		mdetuni.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐴)
3		mdetuni.k	. . . . 5 ⊢ 𝐾 = (Base‘𝑅)
4		mdetuni.0g	. . . . 5 ⊢ 0 = (0_g‘𝑅)
5		mdetuni.1r	. . . . 5 ⊢ 1 = (1_r‘𝑅)
6		mdetuni.pg	. . . . 5 ⊢ + = (+_g‘𝑅)
7		mdetuni.tg	. . . . 5 ⊢ · = (._r‘𝑅)
8		mdetuni.n	. . . . 5 ⊢ (𝜑 → 𝑁 ∈ Fin)
9		mdetuni.r	. . . . 5 ⊢ (𝜑 → 𝑅 ∈ Ring)
10		mdetuni.ff	. . . . 5 ⊢ (𝜑 → 𝐷:𝐵⟶𝐾)
11		mdetuni.al	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝑁 ∀𝑧 ∈ 𝑁 ((𝑦 ≠ 𝑧 ∧ ∀𝑤 ∈ 𝑁 (𝑦𝑥𝑤) = (𝑧𝑥𝑤)) → (𝐷‘𝑥) = 0 ))
12		mdetuni.li	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑤 ∈ 𝑁 (((𝑥 ↾ ({𝑤} × 𝑁)) = ((𝑦 ↾ ({𝑤} × 𝑁)) ∘_𝑓 + (𝑧 ↾ ({𝑤} × 𝑁))) ∧ (𝑥 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) = (𝑦 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) ∧ (𝑥 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) = (𝑧 ↾ ((𝑁 ∖ {𝑤}) × 𝑁))) → (𝐷‘𝑥) = ((𝐷‘𝑦) + (𝐷‘𝑧))))
13		mdetuni.sc	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐾 ∀𝑧 ∈ 𝐵 ∀𝑤 ∈ 𝑁 (((𝑥 ↾ ({𝑤} × 𝑁)) = ((({𝑤} × 𝑁) × {𝑦}) ∘_𝑓 · (𝑧 ↾ ({𝑤} × 𝑁))) ∧ (𝑥 ↾ ((𝑁 ∖ {𝑤}) × 𝑁)) = (𝑧 ↾ ((𝑁 ∖ {𝑤}) × 𝑁))) → (𝐷‘𝑥) = (𝑦 · (𝐷‘𝑧))))
14		mdetunilem6.ph	. . . . 5 ⊢ (𝜓 → 𝜑)
15		mdetunilem6.ef	. . . . . 6 ⊢ (𝜓 → (𝐸 ∈ 𝑁 ∧ 𝐹 ∈ 𝑁 ∧ 𝐸 ≠ 𝐹))
16	15	simp1d 1066	. . . . 5 ⊢ (𝜓 → 𝐸 ∈ 𝑁)
17		mdetunilem6.gh	. . . . . . . 8 ⊢ ((𝜓 ∧ 𝑏 ∈ 𝑁) → (𝐺 ∈ 𝐾 ∧ 𝐻 ∈ 𝐾))
18	17	simprd 478	. . . . . . 7 ⊢ ((𝜓 ∧ 𝑏 ∈ 𝑁) → 𝐻 ∈ 𝐾)
19	18	3adant2 1073	. . . . . 6 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → 𝐻 ∈ 𝐾)
20	17	simpld 474	. . . . . . 7 ⊢ ((𝜓 ∧ 𝑏 ∈ 𝑁) → 𝐺 ∈ 𝐾)
21	20	3adant2 1073	. . . . . 6 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → 𝐺 ∈ 𝐾)
22		ringgrp 18375	. . . . . . . . . . 11 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ Grp)
23	14, 9, 22	3syl 18	. . . . . . . . . 10 ⊢ (𝜓 → 𝑅 ∈ Grp)
24	23	adantr 480	. . . . . . . . 9 ⊢ ((𝜓 ∧ 𝑏 ∈ 𝑁) → 𝑅 ∈ Grp)
25	3, 6	grpcl 17253	. . . . . . . . 9 ⊢ ((𝑅 ∈ Grp ∧ 𝐻 ∈ 𝐾 ∧ 𝐺 ∈ 𝐾) → (𝐻 + 𝐺) ∈ 𝐾)
26	24, 18, 20, 25	syl3anc 1318	. . . . . . . 8 ⊢ ((𝜓 ∧ 𝑏 ∈ 𝑁) → (𝐻 + 𝐺) ∈ 𝐾)
27	26	3adant2 1073	. . . . . . 7 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → (𝐻 + 𝐺) ∈ 𝐾)
28		mdetunilem6.i	. . . . . . 7 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → 𝐼 ∈ 𝐾)
29	27, 28	ifcld 4081	. . . . . 6 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼) ∈ 𝐾)
30	19, 21, 29	3jca 1235	. . . . 5 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → (𝐻 ∈ 𝐾 ∧ 𝐺 ∈ 𝐾 ∧ if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼) ∈ 𝐾))
31	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 30	mdetunilem5 20241	. . . 4 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, (𝐻 + 𝐺), if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) = ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼))))))
32	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 26, 28	mdetunilem2 20238	. . . 4 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, (𝐻 + 𝐺), if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) = 0 )
33	15	simp2d 1067	. . . . . . . 8 ⊢ (𝜓 → 𝐹 ∈ 𝑁)
34	19, 28	ifcld 4081	. . . . . . . . 9 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐻, 𝐼) ∈ 𝐾)
35	19, 21, 34	3jca 1235	. . . . . . . 8 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → (𝐻 ∈ 𝐾 ∧ 𝐺 ∈ 𝐾 ∧ if(𝑎 = 𝐸, 𝐻, 𝐼) ∈ 𝐾))
36	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 33, 35	mdetunilem5 20241	. . . . . . 7 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐻, 𝐼)))) = ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐻, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼))))))
37	15	simp3d 1068	. . . . . . . . . . 11 ⊢ (𝜓 → 𝐸 ≠ 𝐹)
38	37	necomd 2837	. . . . . . . . . 10 ⊢ (𝜓 → 𝐹 ≠ 𝐸)
39	33, 16, 38	3jca 1235	. . . . . . . . 9 ⊢ (𝜓 → (𝐹 ∈ 𝑁 ∧ 𝐸 ∈ 𝑁 ∧ 𝐹 ≠ 𝐸))
40	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 39, 18, 28	mdetunilem2 20238	. . . . . . . 8 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐻, 𝐼)))) = 0 )
41	40	oveq1d 6564	. . . . . . 7 ⊢ (𝜓 → ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐻, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼))))) = ( 0 + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼))))))
42	37	neneqd 2787	. . . . . . . . . . . . . 14 ⊢ (𝜓 → ¬ 𝐸 = 𝐹)
43		eqtr2 2630	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝐸 ∧ 𝑎 = 𝐹) → 𝐸 = 𝐹)
44	42, 43	nsyl 134	. . . . . . . . . . . . 13 ⊢ (𝜓 → ¬ (𝑎 = 𝐸 ∧ 𝑎 = 𝐹))
45	44	3ad2ant1 1075	. . . . . . . . . . . 12 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → ¬ (𝑎 = 𝐸 ∧ 𝑎 = 𝐹))
46		ifcomnan 4087	. . . . . . . . . . . 12 ⊢ (¬ (𝑎 = 𝐸 ∧ 𝑎 = 𝐹) → if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)) = if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))
47	45, 46	syl 17	. . . . . . . . . . 11 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)) = if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))
48	47	mpt2eq3dva 6617	. . . . . . . . . 10 ⊢ (𝜓 → (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))) = (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼))))
49	48	fveq2d 6107	. . . . . . . . 9 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))))
50	14, 10	syl 17	. . . . . . . . . 10 ⊢ (𝜓 → 𝐷:𝐵⟶𝐾)
51	14, 8	syl 17	. . . . . . . . . . 11 ⊢ (𝜓 → 𝑁 ∈ Fin)
52	21, 28	ifcld 4081	. . . . . . . . . . . 12 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐹, 𝐺, 𝐼) ∈ 𝐾)
53	19, 52	ifcld 4081	. . . . . . . . . . 11 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)) ∈ 𝐾)
54	1, 3, 2, 51, 23, 53	matbas2d 20048	. . . . . . . . . 10 ⊢ (𝜓 → (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))) ∈ 𝐵)
55	50, 54	ffvelrnd 6268	. . . . . . . . 9 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) ∈ 𝐾)
56	49, 55	eqeltrrd 2689	. . . . . . . 8 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))) ∈ 𝐾)
57	3, 6, 4	grplid 17275	. . . . . . . 8 ⊢ ((𝑅 ∈ Grp ∧ (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))) ∈ 𝐾) → ( 0 + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼))))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))))
58	23, 56, 57	syl2anc 691	. . . . . . 7 ⊢ (𝜓 → ( 0 + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼))))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))))
59	36, 41, 58	3eqtrd 2648	. . . . . 6 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐻, 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐻, 𝐼)))))
60		ifcomnan 4087	. . . . . . . . 9 ⊢ (¬ (𝑎 = 𝐸 ∧ 𝑎 = 𝐹) → if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)) = if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐻, 𝐼)))
61	45, 60	syl 17	. . . . . . . 8 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)) = if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐻, 𝐼)))
62	61	mpt2eq3dva 6617	. . . . . . 7 ⊢ (𝜓 → (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼))) = (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐻, 𝐼))))
63	62	fveq2d 6107	. . . . . 6 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐻, 𝐼)))))
64	59, 63, 49	3eqtr4d 2654	. . . . 5 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))))
65	21, 28	ifcld 4081	. . . . . . . . 9 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐺, 𝐼) ∈ 𝐾)
66	19, 21, 65	3jca 1235	. . . . . . . 8 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → (𝐻 ∈ 𝐾 ∧ 𝐺 ∈ 𝐾 ∧ if(𝑎 = 𝐸, 𝐺, 𝐼) ∈ 𝐾))
67	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 33, 66	mdetunilem5 20241	. . . . . . 7 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐺, 𝐼)))) = ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐺, 𝐼))))))
68	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 39, 20, 28	mdetunilem2 20238	. . . . . . . 8 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐺, 𝐼)))) = 0 )
69	68	oveq2d 6565	. . . . . . 7 ⊢ (𝜓 → ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐺, if(𝑎 = 𝐸, 𝐺, 𝐼))))) = ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) + 0 ))
70		ifcomnan 4087	. . . . . . . . . . . 12 ⊢ (¬ (𝑎 = 𝐸 ∧ 𝑎 = 𝐹) → if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)) = if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))
71	45, 70	syl 17	. . . . . . . . . . 11 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)) = if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))
72	71	mpt2eq3dva 6617	. . . . . . . . . 10 ⊢ (𝜓 → (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼))) = (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼))))
73	72	fveq2d 6107	. . . . . . . . 9 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))))
74	19, 28	ifcld 4081	. . . . . . . . . . . 12 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐹, 𝐻, 𝐼) ∈ 𝐾)
75	21, 74	ifcld 4081	. . . . . . . . . . 11 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)) ∈ 𝐾)
76	1, 3, 2, 51, 23, 75	matbas2d 20048	. . . . . . . . . 10 ⊢ (𝜓 → (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼))) ∈ 𝐵)
77	50, 76	ffvelrnd 6268	. . . . . . . . 9 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) ∈ 𝐾)
78	73, 77	eqeltrrd 2689	. . . . . . . 8 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) ∈ 𝐾)
79	3, 6, 4	grprid 17276	. . . . . . . 8 ⊢ ((𝑅 ∈ Grp ∧ (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) ∈ 𝐾) → ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) + 0 ) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))))
80	23, 78, 79	syl2anc 691	. . . . . . 7 ⊢ (𝜓 → ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))) + 0 ) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))))
81	67, 69, 80	3eqtrd 2648	. . . . . 6 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐺, 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, 𝐻, if(𝑎 = 𝐸, 𝐺, 𝐼)))))
82		ifcomnan 4087	. . . . . . . . 9 ⊢ (¬ (𝑎 = 𝐸 ∧ 𝑎 = 𝐹) → if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)) = if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐺, 𝐼)))
83	45, 82	syl 17	. . . . . . . 8 ⊢ ((𝜓 ∧ 𝑎 ∈ 𝑁 ∧ 𝑏 ∈ 𝑁) → if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)) = if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐺, 𝐼)))
84	83	mpt2eq3dva 6617	. . . . . . 7 ⊢ (𝜓 → (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼))) = (𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐺, 𝐼))))
85	84	fveq2d 6107	. . . . . 6 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐹, (𝐻 + 𝐺), if(𝑎 = 𝐸, 𝐺, 𝐼)))))
86	81, 85, 73	3eqtr4d 2654	. . . . 5 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))))
87	64, 86	oveq12d 6567	. . . 4 ⊢ (𝜓 → ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, (𝐻 + 𝐺), 𝐼))))) = ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼))))))
88	31, 32, 87	3eqtr3rd 2653	. . 3 ⊢ (𝜓 → ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼))))) = 0 )
89		eqid 2610	. . . . 5 ⊢ (inv_g‘𝑅) = (inv_g‘𝑅)
90	3, 6, 4, 89	grpinvid1 17293	. . . 4 ⊢ ((𝑅 ∈ Grp ∧ (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) ∈ 𝐾 ∧ (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) ∈ 𝐾) → (((inv_g‘𝑅)‘(𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) ↔ ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼))))) = 0 ))
91	23, 55, 77, 90	syl3anc 1318	. . 3 ⊢ (𝜓 → (((inv_g‘𝑅)‘(𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) ↔ ((𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼)))) + (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼))))) = 0 ))
92	88, 91	mpbird 246	. 2 ⊢ (𝜓 → ((inv_g‘𝑅)‘(𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))))) = (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))))
93	92	eqcomd 2616	1 ⊢ (𝜓 → (𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐺, if(𝑎 = 𝐹, 𝐻, 𝐼)))) = ((inv_g‘𝑅)‘(𝐷‘(𝑎 ∈ 𝑁, 𝑏 ∈ 𝑁 ↦ if(𝑎 = 𝐸, 𝐻, if(𝑎 = 𝐹, 𝐺, 𝐼))))))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ∀wral 2896 ∖ cdif 3537 ifcif 4036 {csn 4125 × cxp 5036 ↾ cres 5040 ⟶wf 5800 ‘cfv 5804 (class class class)co 6549 ↦ cmpt2 6551 ∘_𝑓 cof 6793 Fincfn 7841 Basecbs 15695 +_gcplusg 15768 ._rcmulr 15769 0_gc0g 15923 Grpcgrp 17245 inv_gcminusg 17246 1_rcur 18324 Ringcrg 18370 Mat cmat 20032

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892

This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-ot 4134 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-of 6795 df-om 6958 df-1st 7059 df-2nd 7060 df-supp 7183 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-oadd 7451 df-er 7629 df-map 7746 df-ixp 7795 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-fsupp 8159 df-sup 8231 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-2 10956 df-3 10957 df-4 10958 df-5 10959 df-6 10960 df-7 10961 df-8 10962 df-9 10963 df-n0 11170 df-z 11255 df-dec 11370 df-uz 11564 df-fz 12198 df-struct 15697 df-ndx 15698 df-slot 15699 df-base 15700 df-sets 15701 df-ress 15702 df-plusg 15781 df-mulr 15782 df-sca 15784 df-vsca 15785 df-ip 15786 df-tset 15787 df-ple 15788 df-ds 15791 df-hom 15793 df-cco 15794 df-0g 15925 df-prds 15931 df-pws 15933 df-mgm 17065 df-sgrp 17107 df-mnd 17118 df-grp 17248 df-minusg 17249 df-ring 18372 df-sra 18993 df-rgmod 18994 df-dsmm 19895 df-frlm 19910 df-mat 20033

This theorem is referenced by: mdetunilem7 20243

W3C validator