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Theorem m2detleib 21242

Description: Leibniz' Formula for 2x2-matrices. (Contributed by AV, 21-Dec-2018.) (Revised by AV, 26-Dec-2018.) (Proof shortened by AV, 23-Jul-2019.)

**Hypotheses**
Ref	Expression
m2detleib.n	⊢ 𝑁 = {1, 2}
m2detleib.d	⊢ 𝐷 = (𝑁 maDet 𝑅)
m2detleib.a	⊢ 𝐴 = (𝑁 Mat 𝑅)
m2detleib.b	⊢ 𝐵 = (Base‘𝐴)
m2detleib.m	⊢ − = (-_g‘𝑅)
m2detleib.t	⊢ · = (._r‘𝑅)

**Assertion**
Ref	Expression
m2detleib	⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (𝐷‘𝑀) = (((1𝑀1) · (2𝑀2)) − ((2𝑀1) · (1𝑀2))))

Proof of Theorem m2detleib Dummy variables 𝑘 𝑛 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		m2detleib.d	. . . 4 ⊢ 𝐷 = (𝑁 maDet 𝑅)
2		m2detleib.a	. . . 4 ⊢ 𝐴 = (𝑁 Mat 𝑅)
3		m2detleib.b	. . . 4 ⊢ 𝐵 = (Base‘𝐴)
4		eqid 2823	. . . 4 ⊢ (Base‘(SymGrp‘𝑁)) = (Base‘(SymGrp‘𝑁))
5		eqid 2823	. . . 4 ⊢ (ℤRHom‘𝑅) = (ℤRHom‘𝑅)
6		eqid 2823	. . . 4 ⊢ (pmSgn‘𝑁) = (pmSgn‘𝑁)
7		m2detleib.t	. . . 4 ⊢ · = (._r‘𝑅)
8		eqid 2823	. . . 4 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
9	1, 2, 3, 4, 5, 6, 7, 8	mdetleib1 21202	. . 3 ⊢ (𝑀 ∈ 𝐵 → (𝐷‘𝑀) = (𝑅 Σ_g (𝑘 ∈ (Base‘(SymGrp‘𝑁)) ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))))
10	9	adantl 484	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (𝐷‘𝑀) = (𝑅 Σ_g (𝑘 ∈ (Base‘(SymGrp‘𝑁)) ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))))
11		eqid 2823	. . 3 ⊢ (Base‘𝑅) = (Base‘𝑅)
12		eqid 2823	. . 3 ⊢ (+_g‘𝑅) = (+_g‘𝑅)
13		ringcmn 19333	. . . 4 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ CMnd)
14	13	adantr 483	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 𝑅 ∈ CMnd)
15		m2detleib.n	. . . . . 6 ⊢ 𝑁 = {1, 2}
16		prfi 8795	. . . . . 6 ⊢ {1, 2} ∈ Fin
17	15, 16	eqeltri 2911	. . . . 5 ⊢ 𝑁 ∈ Fin
18		eqid 2823	. . . . . 6 ⊢ (SymGrp‘𝑁) = (SymGrp‘𝑁)
19	18, 4	symgbasfi 18509	. . . . 5 ⊢ (𝑁 ∈ Fin → (Base‘(SymGrp‘𝑁)) ∈ Fin)
20	17, 19	ax-mp 5	. . . 4 ⊢ (Base‘(SymGrp‘𝑁)) ∈ Fin
21	20	a1i 11	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (Base‘(SymGrp‘𝑁)) ∈ Fin)
22		simpl 485	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 𝑅 ∈ Ring)
23	22	adantr 483	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → 𝑅 ∈ Ring)
24	4, 6, 5	zrhpsgnelbas 20740	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑁 ∈ Fin ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) ∈ (Base‘𝑅))
25	17, 24	mp3an2 1445	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) ∈ (Base‘𝑅))
26	25	adantlr 713	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) ∈ (Base‘𝑅))
27		simpr 487	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → 𝑘 ∈ (Base‘(SymGrp‘𝑁)))
28		simpr 487	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 𝑀 ∈ 𝐵)
29	28	adantr 483	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → 𝑀 ∈ 𝐵)
30	15, 4, 2, 3, 8	m2detleiblem2 21239	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁)) ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅))
31	23, 27, 29, 30	syl3anc 1367	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅))
32	11, 7	ringcl 19313	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) ∈ (Base‘𝑅) ∧ ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅)) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅))
33	23, 26, 31, 32	syl3anc 1367	. . 3 ⊢ (((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) ∧ 𝑘 ∈ (Base‘(SymGrp‘𝑁))) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅))
34		opex 5358	. . . . . . . 8 ⊢ ⟨1, 1⟩ ∈ V
35		opex 5358	. . . . . . . 8 ⊢ ⟨2, 2⟩ ∈ V
36	34, 35	pm3.2i 473	. . . . . . 7 ⊢ (⟨1, 1⟩ ∈ V ∧ ⟨2, 2⟩ ∈ V)
37		opex 5358	. . . . . . . 8 ⊢ ⟨1, 2⟩ ∈ V
38		opex 5358	. . . . . . . 8 ⊢ ⟨2, 1⟩ ∈ V
39	37, 38	pm3.2i 473	. . . . . . 7 ⊢ (⟨1, 2⟩ ∈ V ∧ ⟨2, 1⟩ ∈ V)
40	36, 39	pm3.2i 473	. . . . . 6 ⊢ ((⟨1, 1⟩ ∈ V ∧ ⟨2, 2⟩ ∈ V) ∧ (⟨1, 2⟩ ∈ V ∧ ⟨2, 1⟩ ∈ V))
41		1ne2 11848	. . . . . . . . . 10 ⊢ 1 ≠ 2
42	41	olci 862	. . . . . . . . 9 ⊢ (1 ≠ 1 ∨ 1 ≠ 2)
43		1ex 10639	. . . . . . . . . 10 ⊢ 1 ∈ V
44	43, 43	opthne 5376	. . . . . . . . 9 ⊢ (⟨1, 1⟩ ≠ ⟨1, 2⟩ ↔ (1 ≠ 1 ∨ 1 ≠ 2))
45	42, 44	mpbir 233	. . . . . . . 8 ⊢ ⟨1, 1⟩ ≠ ⟨1, 2⟩
46	41	orci 861	. . . . . . . . 9 ⊢ (1 ≠ 2 ∨ 1 ≠ 1)
47	43, 43	opthne 5376	. . . . . . . . 9 ⊢ (⟨1, 1⟩ ≠ ⟨2, 1⟩ ↔ (1 ≠ 2 ∨ 1 ≠ 1))
48	46, 47	mpbir 233	. . . . . . . 8 ⊢ ⟨1, 1⟩ ≠ ⟨2, 1⟩
49	45, 48	pm3.2i 473	. . . . . . 7 ⊢ (⟨1, 1⟩ ≠ ⟨1, 2⟩ ∧ ⟨1, 1⟩ ≠ ⟨2, 1⟩)
50	49	orci 861	. . . . . 6 ⊢ ((⟨1, 1⟩ ≠ ⟨1, 2⟩ ∧ ⟨1, 1⟩ ≠ ⟨2, 1⟩) ∨ (⟨2, 2⟩ ≠ ⟨1, 2⟩ ∧ ⟨2, 2⟩ ≠ ⟨2, 1⟩))
51	40, 50	pm3.2i 473	. . . . 5 ⊢ (((⟨1, 1⟩ ∈ V ∧ ⟨2, 2⟩ ∈ V) ∧ (⟨1, 2⟩ ∈ V ∧ ⟨2, 1⟩ ∈ V)) ∧ ((⟨1, 1⟩ ≠ ⟨1, 2⟩ ∧ ⟨1, 1⟩ ≠ ⟨2, 1⟩) ∨ (⟨2, 2⟩ ≠ ⟨1, 2⟩ ∧ ⟨2, 2⟩ ≠ ⟨2, 1⟩)))
52	51	a1i 11	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((⟨1, 1⟩ ∈ V ∧ ⟨2, 2⟩ ∈ V) ∧ (⟨1, 2⟩ ∈ V ∧ ⟨2, 1⟩ ∈ V)) ∧ ((⟨1, 1⟩ ≠ ⟨1, 2⟩ ∧ ⟨1, 1⟩ ≠ ⟨2, 1⟩) ∨ (⟨2, 2⟩ ≠ ⟨1, 2⟩ ∧ ⟨2, 2⟩ ≠ ⟨2, 1⟩))))
53		prneimg 4787	. . . . 5 ⊢ (((⟨1, 1⟩ ∈ V ∧ ⟨2, 2⟩ ∈ V) ∧ (⟨1, 2⟩ ∈ V ∧ ⟨2, 1⟩ ∈ V)) → (((⟨1, 1⟩ ≠ ⟨1, 2⟩ ∧ ⟨1, 1⟩ ≠ ⟨2, 1⟩) ∨ (⟨2, 2⟩ ≠ ⟨1, 2⟩ ∧ ⟨2, 2⟩ ≠ ⟨2, 1⟩)) → {⟨1, 1⟩, ⟨2, 2⟩} ≠ {⟨1, 2⟩, ⟨2, 1⟩}))
54	53	imp 409	. . . 4 ⊢ ((((⟨1, 1⟩ ∈ V ∧ ⟨2, 2⟩ ∈ V) ∧ (⟨1, 2⟩ ∈ V ∧ ⟨2, 1⟩ ∈ V)) ∧ ((⟨1, 1⟩ ≠ ⟨1, 2⟩ ∧ ⟨1, 1⟩ ≠ ⟨2, 1⟩) ∨ (⟨2, 2⟩ ≠ ⟨1, 2⟩ ∧ ⟨2, 2⟩ ≠ ⟨2, 1⟩))) → {⟨1, 1⟩, ⟨2, 2⟩} ≠ {⟨1, 2⟩, ⟨2, 1⟩})
55		disjsn2 4650	. . . 4 ⊢ ({⟨1, 1⟩, ⟨2, 2⟩} ≠ {⟨1, 2⟩, ⟨2, 1⟩} → ({{⟨1, 1⟩, ⟨2, 2⟩}} ∩ {{⟨1, 2⟩, ⟨2, 1⟩}}) = ∅)
56	52, 54, 55	3syl 18	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ({{⟨1, 1⟩, ⟨2, 2⟩}} ∩ {{⟨1, 2⟩, ⟨2, 1⟩}}) = ∅)
57		2nn 11713	. . . . . 6 ⊢ 2 ∈ ℕ
58	18, 4, 15	symg2bas 18523	. . . . . 6 ⊢ ((1 ∈ V ∧ 2 ∈ ℕ) → (Base‘(SymGrp‘𝑁)) = {{⟨1, 1⟩, ⟨2, 2⟩}, {⟨1, 2⟩, ⟨2, 1⟩}})
59	43, 57, 58	mp2an 690	. . . . 5 ⊢ (Base‘(SymGrp‘𝑁)) = {{⟨1, 1⟩, ⟨2, 2⟩}, {⟨1, 2⟩, ⟨2, 1⟩}}
60		df-pr 4572	. . . . 5 ⊢ {{⟨1, 1⟩, ⟨2, 2⟩}, {⟨1, 2⟩, ⟨2, 1⟩}} = ({{⟨1, 1⟩, ⟨2, 2⟩}} ∪ {{⟨1, 2⟩, ⟨2, 1⟩}})
61	59, 60	eqtri 2846	. . . 4 ⊢ (Base‘(SymGrp‘𝑁)) = ({{⟨1, 1⟩, ⟨2, 2⟩}} ∪ {{⟨1, 2⟩, ⟨2, 1⟩}})
62	61	a1i 11	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (Base‘(SymGrp‘𝑁)) = ({{⟨1, 1⟩, ⟨2, 2⟩}} ∪ {{⟨1, 2⟩, ⟨2, 1⟩}}))
63	11, 12, 14, 21, 33, 56, 62	gsummptfidmsplit 19052	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (𝑅 Σ_g (𝑘 ∈ (Base‘(SymGrp‘𝑁)) ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))) = ((𝑅 Σ_g (𝑘 ∈ {{⟨1, 1⟩, ⟨2, 2⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))))))(+_g‘𝑅)(𝑅 Σ_g (𝑘 ∈ {{⟨1, 2⟩, ⟨2, 1⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))))))))
64		ringmnd 19308	. . . . . 6 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ Mnd)
65	64	adantr 483	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 𝑅 ∈ Mnd)
66		prex 5335	. . . . . 6 ⊢ {⟨1, 1⟩, ⟨2, 2⟩} ∈ V
67	66	a1i 11	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → {⟨1, 1⟩, ⟨2, 2⟩} ∈ V)
68	66	prid1 4700	. . . . . . . . 9 ⊢ {⟨1, 1⟩, ⟨2, 2⟩} ∈ {{⟨1, 1⟩, ⟨2, 2⟩}, {⟨1, 2⟩, ⟨2, 1⟩}}
69	68, 59	eleqtrri 2914	. . . . . . . 8 ⊢ {⟨1, 1⟩, ⟨2, 2⟩} ∈ (Base‘(SymGrp‘𝑁))
70	69	a1i 11	. . . . . . 7 ⊢ (𝑀 ∈ 𝐵 → {⟨1, 1⟩, ⟨2, 2⟩} ∈ (Base‘(SymGrp‘𝑁)))
71	4, 6, 5	zrhpsgnelbas 20740	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝑁 ∈ Fin ∧ {⟨1, 1⟩, ⟨2, 2⟩} ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) ∈ (Base‘𝑅))
72	17, 71	mp3an2 1445	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 1⟩, ⟨2, 2⟩} ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) ∈ (Base‘𝑅))
73	70, 72	sylan2 594	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) ∈ (Base‘𝑅))
74	15, 4, 2, 3, 8	m2detleiblem2 21239	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 1⟩, ⟨2, 2⟩} ∈ (Base‘(SymGrp‘𝑁)) ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅))
75	69, 74	mp3an2 1445	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅))
76	11, 7	ringcl 19313	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) ∈ (Base‘𝑅) ∧ ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅)) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅))
77	22, 73, 75, 76	syl3anc 1367	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅))
78		2fveq3 6677	. . . . . . 7 ⊢ (𝑘 = {⟨1, 1⟩, ⟨2, 2⟩} → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) = ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})))
79		fveq1 6671	. . . . . . . . . 10 ⊢ (𝑘 = {⟨1, 1⟩, ⟨2, 2⟩} → (𝑘‘𝑛) = ({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛))
80	79	oveq1d 7173	. . . . . . . . 9 ⊢ (𝑘 = {⟨1, 1⟩, ⟨2, 2⟩} → ((𝑘‘𝑛)𝑀𝑛) = (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))
81	80	mpteq2dv 5164	. . . . . . . 8 ⊢ (𝑘 = {⟨1, 1⟩, ⟨2, 2⟩} → (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)) = (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))
82	81	oveq2d 7174	. . . . . . 7 ⊢ (𝑘 = {⟨1, 1⟩, ⟨2, 2⟩} → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))) = ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))))
83	78, 82	oveq12d 7176	. . . . . 6 ⊢ (𝑘 = {⟨1, 1⟩, ⟨2, 2⟩} → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))) = (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))))
84	11, 83	gsumsn 19076	. . . . 5 ⊢ ((𝑅 ∈ Mnd ∧ {⟨1, 1⟩, ⟨2, 2⟩} ∈ V ∧ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅)) → (𝑅 Σ_g (𝑘 ∈ {{⟨1, 1⟩, ⟨2, 2⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))) = (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))))
85	65, 67, 77, 84	syl3anc 1367	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (𝑅 Σ_g (𝑘 ∈ {{⟨1, 1⟩, ⟨2, 2⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))) = (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))))
86		prex 5335	. . . . . 6 ⊢ {⟨1, 2⟩, ⟨2, 1⟩} ∈ V
87	86	a1i 11	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → {⟨1, 2⟩, ⟨2, 1⟩} ∈ V)
88	86	prid2 4701	. . . . . . . . 9 ⊢ {⟨1, 2⟩, ⟨2, 1⟩} ∈ {{⟨1, 1⟩, ⟨2, 2⟩}, {⟨1, 2⟩, ⟨2, 1⟩}}
89	88, 59	eleqtrri 2914	. . . . . . . 8 ⊢ {⟨1, 2⟩, ⟨2, 1⟩} ∈ (Base‘(SymGrp‘𝑁))
90	89	a1i 11	. . . . . . 7 ⊢ (𝑀 ∈ 𝐵 → {⟨1, 2⟩, ⟨2, 1⟩} ∈ (Base‘(SymGrp‘𝑁)))
91	4, 6, 5	zrhpsgnelbas 20740	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝑁 ∈ Fin ∧ {⟨1, 2⟩, ⟨2, 1⟩} ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) ∈ (Base‘𝑅))
92	17, 91	mp3an2 1445	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 2⟩, ⟨2, 1⟩} ∈ (Base‘(SymGrp‘𝑁))) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) ∈ (Base‘𝑅))
93	90, 92	sylan2 594	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) ∈ (Base‘𝑅))
94	15, 4, 2, 3, 8	m2detleiblem2 21239	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 2⟩, ⟨2, 1⟩} ∈ (Base‘(SymGrp‘𝑁)) ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅))
95	89, 94	mp3an2 1445	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅))
96	11, 7	ringcl 19313	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) ∈ (Base‘𝑅) ∧ ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))) ∈ (Base‘𝑅)) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅))
97	22, 93, 95, 96	syl3anc 1367	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅))
98		2fveq3 6677	. . . . . . 7 ⊢ (𝑘 = {⟨1, 2⟩, ⟨2, 1⟩} → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) = ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})))
99		fveq1 6671	. . . . . . . . . 10 ⊢ (𝑘 = {⟨1, 2⟩, ⟨2, 1⟩} → (𝑘‘𝑛) = ({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛))
100	99	oveq1d 7173	. . . . . . . . 9 ⊢ (𝑘 = {⟨1, 2⟩, ⟨2, 1⟩} → ((𝑘‘𝑛)𝑀𝑛) = (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))
101	100	mpteq2dv 5164	. . . . . . . 8 ⊢ (𝑘 = {⟨1, 2⟩, ⟨2, 1⟩} → (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)) = (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))
102	101	oveq2d 7174	. . . . . . 7 ⊢ (𝑘 = {⟨1, 2⟩, ⟨2, 1⟩} → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))) = ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))))
103	98, 102	oveq12d 7176	. . . . . 6 ⊢ (𝑘 = {⟨1, 2⟩, ⟨2, 1⟩} → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))) = (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))))
104	11, 103	gsumsn 19076	. . . . 5 ⊢ ((𝑅 ∈ Mnd ∧ {⟨1, 2⟩, ⟨2, 1⟩} ∈ V ∧ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))) ∈ (Base‘𝑅)) → (𝑅 Σ_g (𝑘 ∈ {{⟨1, 2⟩, ⟨2, 1⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))) = (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))))
105	65, 87, 97, 104	syl3anc 1367	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (𝑅 Σ_g (𝑘 ∈ {{⟨1, 2⟩, ⟨2, 1⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛)))))) = (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))))
106	85, 105	oveq12d 7176	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((𝑅 Σ_g (𝑘 ∈ {{⟨1, 1⟩, ⟨2, 2⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))))))(+_g‘𝑅)(𝑅 Σ_g (𝑘 ∈ {{⟨1, 2⟩, ⟨2, 1⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))))))) = ((((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))))(+_g‘𝑅)(((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))))))
107		eqidd 2824	. . . . . . 7 ⊢ (𝑀 ∈ 𝐵 → {⟨1, 1⟩, ⟨2, 2⟩} = {⟨1, 1⟩, ⟨2, 2⟩})
108		eqid 2823	. . . . . . . 8 ⊢ (1_r‘𝑅) = (1_r‘𝑅)
109	15, 4, 5, 6, 108	m2detleiblem5 21236	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 1⟩, ⟨2, 2⟩} = {⟨1, 1⟩, ⟨2, 2⟩}) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) = (1_r‘𝑅))
110	107, 109	sylan2 594	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) = (1_r‘𝑅))
111		eqidd 2824	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → {⟨1, 1⟩, ⟨2, 2⟩} = {⟨1, 1⟩, ⟨2, 2⟩})
112	8, 7	mgpplusg 19245	. . . . . . . 8 ⊢ · = (+_g‘(mulGrp‘𝑅))
113	15, 4, 2, 3, 8, 112	m2detleiblem3 21240	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 1⟩, ⟨2, 2⟩} = {⟨1, 1⟩, ⟨2, 2⟩} ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))) = ((1𝑀1) · (2𝑀2)))
114	22, 111, 28, 113	syl3anc 1367	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))) = ((1𝑀1) · (2𝑀2)))
115	110, 114	oveq12d 7176	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))) = ((1_r‘𝑅) · ((1𝑀1) · (2𝑀2))))
116	43	prid1 4700	. . . . . . . . . 10 ⊢ 1 ∈ {1, 2}
117	116, 15	eleqtrri 2914	. . . . . . . . 9 ⊢ 1 ∈ 𝑁
118	117	a1i 11	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 1 ∈ 𝑁)
119	3	eleq2i 2906	. . . . . . . . . 10 ⊢ (𝑀 ∈ 𝐵 ↔ 𝑀 ∈ (Base‘𝐴))
120	119	biimpi 218	. . . . . . . . 9 ⊢ (𝑀 ∈ 𝐵 → 𝑀 ∈ (Base‘𝐴))
121	120	adantl 484	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 𝑀 ∈ (Base‘𝐴))
122	2, 11	matecl 21036	. . . . . . . 8 ⊢ ((1 ∈ 𝑁 ∧ 1 ∈ 𝑁 ∧ 𝑀 ∈ (Base‘𝐴)) → (1𝑀1) ∈ (Base‘𝑅))
123	118, 118, 121, 122	syl3anc 1367	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (1𝑀1) ∈ (Base‘𝑅))
124		prid2g 4699	. . . . . . . . . . 11 ⊢ (2 ∈ ℕ → 2 ∈ {1, 2})
125	57, 124	ax-mp 5	. . . . . . . . . 10 ⊢ 2 ∈ {1, 2}
126	125, 15	eleqtrri 2914	. . . . . . . . 9 ⊢ 2 ∈ 𝑁
127	126	a1i 11	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → 2 ∈ 𝑁)
128	2, 11	matecl 21036	. . . . . . . 8 ⊢ ((2 ∈ 𝑁 ∧ 2 ∈ 𝑁 ∧ 𝑀 ∈ (Base‘𝐴)) → (2𝑀2) ∈ (Base‘𝑅))
129	127, 127, 121, 128	syl3anc 1367	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (2𝑀2) ∈ (Base‘𝑅))
130	11, 7	ringcl 19313	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ (1𝑀1) ∈ (Base‘𝑅) ∧ (2𝑀2) ∈ (Base‘𝑅)) → ((1𝑀1) · (2𝑀2)) ∈ (Base‘𝑅))
131	22, 123, 129, 130	syl3anc 1367	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((1𝑀1) · (2𝑀2)) ∈ (Base‘𝑅))
132	11, 7, 108	ringlidm 19323	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ ((1𝑀1) · (2𝑀2)) ∈ (Base‘𝑅)) → ((1_r‘𝑅) · ((1𝑀1) · (2𝑀2))) = ((1𝑀1) · (2𝑀2)))
133	131, 132	syldan 593	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((1_r‘𝑅) · ((1𝑀1) · (2𝑀2))) = ((1𝑀1) · (2𝑀2)))
134	115, 133	eqtrd 2858	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛)))) = ((1𝑀1) · (2𝑀2)))
135		eqidd 2824	. . . . . 6 ⊢ (𝑀 ∈ 𝐵 → {⟨1, 2⟩, ⟨2, 1⟩} = {⟨1, 2⟩, ⟨2, 1⟩})
136		eqid 2823	. . . . . . 7 ⊢ (inv_g‘𝑅) = (inv_g‘𝑅)
137	15, 4, 5, 6, 108, 136	m2detleiblem6 21237	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 2⟩, ⟨2, 1⟩} = {⟨1, 2⟩, ⟨2, 1⟩}) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) = ((inv_g‘𝑅)‘(1_r‘𝑅)))
138	135, 137	sylan2 594	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) = ((inv_g‘𝑅)‘(1_r‘𝑅)))
139		eqidd 2824	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → {⟨1, 2⟩, ⟨2, 1⟩} = {⟨1, 2⟩, ⟨2, 1⟩})
140	15, 4, 2, 3, 8, 112	m2detleiblem4 21241	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ {⟨1, 2⟩, ⟨2, 1⟩} = {⟨1, 2⟩, ⟨2, 1⟩} ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))) = ((2𝑀1) · (1𝑀2)))
141	22, 139, 28, 140	syl3anc 1367	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))) = ((2𝑀1) · (1𝑀2)))
142	138, 141	oveq12d 7176	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛)))) = (((inv_g‘𝑅)‘(1_r‘𝑅)) · ((2𝑀1) · (1𝑀2))))
143	134, 142	oveq12d 7176	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 1⟩, ⟨2, 2⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 1⟩, ⟨2, 2⟩}‘𝑛)𝑀𝑛))))(+_g‘𝑅)(((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘{⟨1, 2⟩, ⟨2, 1⟩})) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ (({⟨1, 2⟩, ⟨2, 1⟩}‘𝑛)𝑀𝑛))))) = (((1𝑀1) · (2𝑀2))(+_g‘𝑅)(((inv_g‘𝑅)‘(1_r‘𝑅)) · ((2𝑀1) · (1𝑀2)))))
144	2, 11	matecl 21036	. . . . . 6 ⊢ ((2 ∈ 𝑁 ∧ 1 ∈ 𝑁 ∧ 𝑀 ∈ (Base‘𝐴)) → (2𝑀1) ∈ (Base‘𝑅))
145	127, 118, 121, 144	syl3anc 1367	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (2𝑀1) ∈ (Base‘𝑅))
146	2, 11	matecl 21036	. . . . . 6 ⊢ ((1 ∈ 𝑁 ∧ 2 ∈ 𝑁 ∧ 𝑀 ∈ (Base‘𝐴)) → (1𝑀2) ∈ (Base‘𝑅))
147	118, 127, 121, 146	syl3anc 1367	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (1𝑀2) ∈ (Base‘𝑅))
148	11, 7	ringcl 19313	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (2𝑀1) ∈ (Base‘𝑅) ∧ (1𝑀2) ∈ (Base‘𝑅)) → ((2𝑀1) · (1𝑀2)) ∈ (Base‘𝑅))
149	22, 145, 147, 148	syl3anc 1367	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((2𝑀1) · (1𝑀2)) ∈ (Base‘𝑅))
150		m2detleib.m	. . . . 5 ⊢ − = (-_g‘𝑅)
151	15, 4, 5, 6, 108, 136, 7, 150	m2detleiblem7 21238	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ ((1𝑀1) · (2𝑀2)) ∈ (Base‘𝑅) ∧ ((2𝑀1) · (1𝑀2)) ∈ (Base‘𝑅)) → (((1𝑀1) · (2𝑀2))(+_g‘𝑅)(((inv_g‘𝑅)‘(1_r‘𝑅)) · ((2𝑀1) · (1𝑀2)))) = (((1𝑀1) · (2𝑀2)) − ((2𝑀1) · (1𝑀2))))
152	22, 131, 149, 151	syl3anc 1367	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (((1𝑀1) · (2𝑀2))(+_g‘𝑅)(((inv_g‘𝑅)‘(1_r‘𝑅)) · ((2𝑀1) · (1𝑀2)))) = (((1𝑀1) · (2𝑀2)) − ((2𝑀1) · (1𝑀2))))
153	106, 143, 152	3eqtrd 2862	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → ((𝑅 Σ_g (𝑘 ∈ {{⟨1, 1⟩, ⟨2, 2⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))))))(+_g‘𝑅)(𝑅 Σ_g (𝑘 ∈ {{⟨1, 2⟩, ⟨2, 1⟩}} ↦ (((ℤRHom‘𝑅)‘((pmSgn‘𝑁)‘𝑘)) · ((mulGrp‘𝑅) Σ_g (𝑛 ∈ 𝑁 ↦ ((𝑘‘𝑛)𝑀𝑛))))))) = (((1𝑀1) · (2𝑀2)) − ((2𝑀1) · (1𝑀2))))
154	10, 63, 153	3eqtrd 2862	1 ⊢ ((𝑅 ∈ Ring ∧ 𝑀 ∈ 𝐵) → (𝐷‘𝑀) = (((1𝑀1) · (2𝑀2)) − ((2𝑀1) · (1𝑀2))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 ∨ wo 843 = wceq 1537 ∈ wcel 2114 ≠ wne 3018 Vcvv 3496 ∪ cun 3936 ∩ cin 3937 ∅c0 4293 {csn 4569 {cpr 4571 ⟨cop 4575 ↦ cmpt 5148 ‘cfv 6357 (class class class)co 7158 Fincfn 8511 1c1 10540 ℕcn 11640 2c2 11695 Basecbs 16485 +_gcplusg 16567 ._rcmulr 16568 Σ_g cgsu 16716 Mndcmnd 17913 inv_gcminusg 18106 -_gcsg 18107 SymGrpcsymg 18497 pmSgncpsgn 18619 CMndccmn 18908 mulGrpcmgp 19241 1_rcur 19253 Ringcrg 19299 ℤRHomczrh 20649 Mat cmat 21018 maDet cmdat 21195

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-addf 10618 ax-mulf 10619

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-xor 1502 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-ot 4578 df-uni 4841 df-int 4879 df-iun 4923 df-iin 4924 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-se 5517 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-isom 6366 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-of 7411 df-om 7583 df-1st 7691 df-2nd 7692 df-supp 7833 df-tpos 7894 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-2o 8105 df-oadd 8108 df-er 8291 df-map 8410 df-pm 8411 df-ixp 8464 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-fsupp 8836 df-sup 8908 df-oi 8976 df-dju 9332 df-card 9370 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 df-n0 11901 df-xnn0 11971 df-z 11985 df-dec 12102 df-uz 12247 df-rp 12393 df-fz 12896 df-fzo 13037 df-seq 13373 df-exp 13433 df-fac 13637 df-bc 13666 df-hash 13694 df-word 13865 df-lsw 13917 df-concat 13925 df-s1 13952 df-substr 14005 df-pfx 14035 df-splice 14114 df-reverse 14123 df-s2 14212 df-struct 16487 df-ndx 16488 df-slot 16489 df-base 16491 df-sets 16492 df-ress 16493 df-plusg 16580 df-mulr 16581 df-starv 16582 df-sca 16583 df-vsca 16584 df-ip 16585 df-tset 16586 df-ple 16587 df-ds 16589 df-unif 16590 df-hom 16591 df-cco 16592 df-0g 16717 df-gsum 16718 df-prds 16723 df-pws 16725 df-mre 16859 df-mrc 16860 df-acs 16862 df-mgm 17854 df-sgrp 17903 df-mnd 17914 df-mhm 17958 df-submnd 17959 df-efmnd 18036 df-grp 18108 df-minusg 18109 df-sbg 18110 df-mulg 18227 df-subg 18278 df-ghm 18358 df-gim 18401 df-cntz 18449 df-oppg 18476 df-symg 18498 df-pmtr 18572 df-psgn 18621 df-cmn 18910 df-abl 18911 df-mgp 19242 df-ur 19254 df-ring 19301 df-cring 19302 df-rnghom 19469 df-subrg 19535 df-sra 19946 df-rgmod 19947 df-cnfld 20548 df-zring 20620 df-zrh 20653 df-dsmm 20878 df-frlm 20893 df-mat 21019 df-mdet 21196

This theorem is referenced by: lmat22det 31089

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