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Theorem madurid 20498
Description: Multiplying a matrix with its adjunct results in the identity matrix multiplied with the determinant of the matrix. See Proposition 4.16 in [Lang] p. 518. (Contributed by Stefan O'Rear, 16-Jul-2018.)
Hypotheses
Ref Expression
madurid.a 𝐴 = (𝑁 Mat 𝑅)
madurid.b 𝐵 = (Base‘𝐴)
madurid.j 𝐽 = (𝑁 maAdju 𝑅)
madurid.d 𝐷 = (𝑁 maDet 𝑅)
madurid.i 1 = (1r𝐴)
madurid.t · = (.r𝐴)
madurid.s = ( ·𝑠𝐴)
Assertion
Ref Expression
madurid ((𝑀𝐵𝑅 ∈ CRing) → (𝑀 · (𝐽𝑀)) = ((𝐷𝑀) 1 ))

Proof of Theorem madurid
Dummy variables 𝑎 𝑏 𝑐 𝑑 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2651 . . 3 (𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩) = (𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩)
2 eqid 2651 . . 3 (Base‘𝑅) = (Base‘𝑅)
3 eqid 2651 . . 3 (.r𝑅) = (.r𝑅)
4 simpr 476 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → 𝑅 ∈ CRing)
5 madurid.a . . . . . 6 𝐴 = (𝑁 Mat 𝑅)
6 madurid.b . . . . . 6 𝐵 = (Base‘𝐴)
75, 6matrcl 20266 . . . . 5 (𝑀𝐵 → (𝑁 ∈ Fin ∧ 𝑅 ∈ V))
87simpld 474 . . . 4 (𝑀𝐵𝑁 ∈ Fin)
98adantr 480 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → 𝑁 ∈ Fin)
105, 2, 6matbas2i 20276 . . . 4 (𝑀𝐵𝑀 ∈ ((Base‘𝑅) ↑𝑚 (𝑁 × 𝑁)))
1110adantr 480 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → 𝑀 ∈ ((Base‘𝑅) ↑𝑚 (𝑁 × 𝑁)))
12 madurid.j . . . . . . 7 𝐽 = (𝑁 maAdju 𝑅)
135, 12, 6maduf 20495 . . . . . 6 (𝑅 ∈ CRing → 𝐽:𝐵𝐵)
1413adantl 481 . . . . 5 ((𝑀𝐵𝑅 ∈ CRing) → 𝐽:𝐵𝐵)
15 simpl 472 . . . . 5 ((𝑀𝐵𝑅 ∈ CRing) → 𝑀𝐵)
1614, 15ffvelrnd 6400 . . . 4 ((𝑀𝐵𝑅 ∈ CRing) → (𝐽𝑀) ∈ 𝐵)
175, 2, 6matbas2i 20276 . . . 4 ((𝐽𝑀) ∈ 𝐵 → (𝐽𝑀) ∈ ((Base‘𝑅) ↑𝑚 (𝑁 × 𝑁)))
1816, 17syl 17 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → (𝐽𝑀) ∈ ((Base‘𝑅) ↑𝑚 (𝑁 × 𝑁)))
191, 2, 3, 4, 9, 9, 9, 11, 18mamuval 20240 . 2 ((𝑀𝐵𝑅 ∈ CRing) → (𝑀(𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩)(𝐽𝑀)) = (𝑎𝑁, 𝑏𝑁 ↦ (𝑅 Σg (𝑐𝑁 ↦ ((𝑎𝑀𝑐)(.r𝑅)(𝑐(𝐽𝑀)𝑏))))))
205, 1matmulr 20292 . . . . 5 ((𝑁 ∈ Fin ∧ 𝑅 ∈ CRing) → (𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩) = (.r𝐴))
218, 20sylan 487 . . . 4 ((𝑀𝐵𝑅 ∈ CRing) → (𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩) = (.r𝐴))
22 madurid.t . . . 4 · = (.r𝐴)
2321, 22syl6eqr 2703 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → (𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩) = · )
2423oveqd 6707 . 2 ((𝑀𝐵𝑅 ∈ CRing) → (𝑀(𝑅 maMul ⟨𝑁, 𝑁, 𝑁⟩)(𝐽𝑀)) = (𝑀 · (𝐽𝑀)))
25 madurid.d . . . . . 6 𝐷 = (𝑁 maDet 𝑅)
26 simp1l 1105 . . . . . 6 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → 𝑀𝐵)
27 simp1r 1106 . . . . . 6 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → 𝑅 ∈ CRing)
28 elmapi 7921 . . . . . . . . . 10 (𝑀 ∈ ((Base‘𝑅) ↑𝑚 (𝑁 × 𝑁)) → 𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅))
2911, 28syl 17 . . . . . . . . 9 ((𝑀𝐵𝑅 ∈ CRing) → 𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅))
30293ad2ant1 1102 . . . . . . . 8 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → 𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅))
3130adantr 480 . . . . . . 7 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ 𝑐𝑁) → 𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅))
32 simpl2 1085 . . . . . . 7 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ 𝑐𝑁) → 𝑎𝑁)
33 simpr 476 . . . . . . 7 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ 𝑐𝑁) → 𝑐𝑁)
3431, 32, 33fovrnd 6848 . . . . . 6 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ 𝑐𝑁) → (𝑎𝑀𝑐) ∈ (Base‘𝑅))
35 simp3 1083 . . . . . 6 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → 𝑏𝑁)
365, 12, 6, 25, 3, 2, 26, 27, 34, 35madugsum 20497 . . . . 5 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → (𝑅 Σg (𝑐𝑁 ↦ ((𝑎𝑀𝑐)(.r𝑅)(𝑐(𝐽𝑀)𝑏)))) = (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))))
37 iftrue 4125 . . . . . . . . 9 (𝑎 = 𝑏 → if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)) = (𝐷𝑀))
3837adantl 481 . . . . . . . 8 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)) = (𝐷𝑀))
39 ffn 6083 . . . . . . . . . . . . 13 (𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅) → 𝑀 Fn (𝑁 × 𝑁))
4029, 39syl 17 . . . . . . . . . . . 12 ((𝑀𝐵𝑅 ∈ CRing) → 𝑀 Fn (𝑁 × 𝑁))
41 fnov 6810 . . . . . . . . . . . 12 (𝑀 Fn (𝑁 × 𝑁) ↔ 𝑀 = (𝑑𝑁, 𝑐𝑁 ↦ (𝑑𝑀𝑐)))
4240, 41sylib 208 . . . . . . . . . . 11 ((𝑀𝐵𝑅 ∈ CRing) → 𝑀 = (𝑑𝑁, 𝑐𝑁 ↦ (𝑑𝑀𝑐)))
4342adantr 480 . . . . . . . . . 10 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → 𝑀 = (𝑑𝑁, 𝑐𝑁 ↦ (𝑑𝑀𝑐)))
44 equtr2 2000 . . . . . . . . . . . . . . 15 ((𝑎 = 𝑏𝑑 = 𝑏) → 𝑎 = 𝑑)
4544oveq1d 6705 . . . . . . . . . . . . . 14 ((𝑎 = 𝑏𝑑 = 𝑏) → (𝑎𝑀𝑐) = (𝑑𝑀𝑐))
4645ifeq1da 4149 . . . . . . . . . . . . 13 (𝑎 = 𝑏 → if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)) = if(𝑑 = 𝑏, (𝑑𝑀𝑐), (𝑑𝑀𝑐)))
47 ifid 4158 . . . . . . . . . . . . 13 if(𝑑 = 𝑏, (𝑑𝑀𝑐), (𝑑𝑀𝑐)) = (𝑑𝑀𝑐)
4846, 47syl6eq 2701 . . . . . . . . . . . 12 (𝑎 = 𝑏 → if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)) = (𝑑𝑀𝑐))
4948adantl 481 . . . . . . . . . . 11 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)) = (𝑑𝑀𝑐))
5049mpt2eq3dv 6763 . . . . . . . . . 10 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → (𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐))) = (𝑑𝑁, 𝑐𝑁 ↦ (𝑑𝑀𝑐)))
5143, 50eqtr4d 2688 . . . . . . . . 9 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → 𝑀 = (𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐))))
5251fveq2d 6233 . . . . . . . 8 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → (𝐷𝑀) = (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))))
5338, 52eqtr2d 2686 . . . . . . 7 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎 = 𝑏) → (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))) = if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)))
54533ad2antl1 1243 . . . . . 6 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ 𝑎 = 𝑏) → (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))) = if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)))
55 eqid 2651 . . . . . . . 8 (0g𝑅) = (0g𝑅)
56 simpl1r 1133 . . . . . . . 8 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → 𝑅 ∈ CRing)
5793ad2ant1 1102 . . . . . . . . 9 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → 𝑁 ∈ Fin)
5857adantr 480 . . . . . . . 8 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → 𝑁 ∈ Fin)
5930ad2antrr 762 . . . . . . . . 9 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ 𝑐𝑁) → 𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅))
60 simpll2 1121 . . . . . . . . 9 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ 𝑐𝑁) → 𝑎𝑁)
61 simpr 476 . . . . . . . . 9 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ 𝑐𝑁) → 𝑐𝑁)
6259, 60, 61fovrnd 6848 . . . . . . . 8 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ 𝑐𝑁) → (𝑎𝑀𝑐) ∈ (Base‘𝑅))
6330adantr 480 . . . . . . . . . 10 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → 𝑀:(𝑁 × 𝑁)⟶(Base‘𝑅))
6463fovrnda 6847 . . . . . . . . 9 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ (𝑑𝑁𝑐𝑁)) → (𝑑𝑀𝑐) ∈ (Base‘𝑅))
65643impb 1279 . . . . . . . 8 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ 𝑑𝑁𝑐𝑁) → (𝑑𝑀𝑐) ∈ (Base‘𝑅))
66 simpl3 1086 . . . . . . . 8 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → 𝑏𝑁)
67 simpl2 1085 . . . . . . . 8 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → 𝑎𝑁)
68 df-ne 2824 . . . . . . . . . . 11 (𝑎𝑏 ↔ ¬ 𝑎 = 𝑏)
6968biimpri 218 . . . . . . . . . 10 𝑎 = 𝑏𝑎𝑏)
7069necomd 2878 . . . . . . . . 9 𝑎 = 𝑏𝑏𝑎)
7170adantl 481 . . . . . . . 8 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → 𝑏𝑎)
7225, 2, 55, 56, 58, 62, 65, 66, 67, 71mdetralt2 20463 . . . . . . 7 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), if(𝑑 = 𝑎, (𝑎𝑀𝑐), (𝑑𝑀𝑐))))) = (0g𝑅))
73 ifid 4158 . . . . . . . . . . 11 if(𝑑 = 𝑎, (𝑑𝑀𝑐), (𝑑𝑀𝑐)) = (𝑑𝑀𝑐)
74 oveq1 6697 . . . . . . . . . . . . 13 (𝑑 = 𝑎 → (𝑑𝑀𝑐) = (𝑎𝑀𝑐))
7574adantl 481 . . . . . . . . . . . 12 (((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) ∧ 𝑑 = 𝑎) → (𝑑𝑀𝑐) = (𝑎𝑀𝑐))
7675ifeq1da 4149 . . . . . . . . . . 11 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → if(𝑑 = 𝑎, (𝑑𝑀𝑐), (𝑑𝑀𝑐)) = if(𝑑 = 𝑎, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))
7773, 76syl5eqr 2699 . . . . . . . . . 10 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → (𝑑𝑀𝑐) = if(𝑑 = 𝑎, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))
7877ifeq2d 4138 . . . . . . . . 9 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)) = if(𝑑 = 𝑏, (𝑎𝑀𝑐), if(𝑑 = 𝑎, (𝑎𝑀𝑐), (𝑑𝑀𝑐))))
7978mpt2eq3dv 6763 . . . . . . . 8 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → (𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐))) = (𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), if(𝑑 = 𝑎, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))))
8079fveq2d 6233 . . . . . . 7 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))) = (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), if(𝑑 = 𝑎, (𝑎𝑀𝑐), (𝑑𝑀𝑐))))))
81 iffalse 4128 . . . . . . . 8 𝑎 = 𝑏 → if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)) = (0g𝑅))
8281adantl 481 . . . . . . 7 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)) = (0g𝑅))
8372, 80, 823eqtr4d 2695 . . . . . 6 ((((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) ∧ ¬ 𝑎 = 𝑏) → (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))) = if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)))
8454, 83pm2.61dan 849 . . . . 5 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → (𝐷‘(𝑑𝑁, 𝑐𝑁 ↦ if(𝑑 = 𝑏, (𝑎𝑀𝑐), (𝑑𝑀𝑐)))) = if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)))
8536, 84eqtrd 2685 . . . 4 (((𝑀𝐵𝑅 ∈ CRing) ∧ 𝑎𝑁𝑏𝑁) → (𝑅 Σg (𝑐𝑁 ↦ ((𝑎𝑀𝑐)(.r𝑅)(𝑐(𝐽𝑀)𝑏)))) = if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅)))
8685mpt2eq3dva 6761 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → (𝑎𝑁, 𝑏𝑁 ↦ (𝑅 Σg (𝑐𝑁 ↦ ((𝑎𝑀𝑐)(.r𝑅)(𝑐(𝐽𝑀)𝑏))))) = (𝑎𝑁, 𝑏𝑁 ↦ if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅))))
87 madurid.i . . . . 5 1 = (1r𝐴)
8887oveq2i 6701 . . . 4 ((𝐷𝑀) 1 ) = ((𝐷𝑀) (1r𝐴))
89 crngring 18604 . . . . . 6 (𝑅 ∈ CRing → 𝑅 ∈ Ring)
9089adantl 481 . . . . 5 ((𝑀𝐵𝑅 ∈ CRing) → 𝑅 ∈ Ring)
9125, 5, 6, 2mdetf 20449 . . . . . . 7 (𝑅 ∈ CRing → 𝐷:𝐵⟶(Base‘𝑅))
9291adantl 481 . . . . . 6 ((𝑀𝐵𝑅 ∈ CRing) → 𝐷:𝐵⟶(Base‘𝑅))
9392, 15ffvelrnd 6400 . . . . 5 ((𝑀𝐵𝑅 ∈ CRing) → (𝐷𝑀) ∈ (Base‘𝑅))
94 madurid.s . . . . . 6 = ( ·𝑠𝐴)
955, 2, 94, 55matsc 20304 . . . . 5 ((𝑁 ∈ Fin ∧ 𝑅 ∈ Ring ∧ (𝐷𝑀) ∈ (Base‘𝑅)) → ((𝐷𝑀) (1r𝐴)) = (𝑎𝑁, 𝑏𝑁 ↦ if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅))))
969, 90, 93, 95syl3anc 1366 . . . 4 ((𝑀𝐵𝑅 ∈ CRing) → ((𝐷𝑀) (1r𝐴)) = (𝑎𝑁, 𝑏𝑁 ↦ if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅))))
9788, 96syl5eq 2697 . . 3 ((𝑀𝐵𝑅 ∈ CRing) → ((𝐷𝑀) 1 ) = (𝑎𝑁, 𝑏𝑁 ↦ if(𝑎 = 𝑏, (𝐷𝑀), (0g𝑅))))
9886, 97eqtr4d 2688 . 2 ((𝑀𝐵𝑅 ∈ CRing) → (𝑎𝑁, 𝑏𝑁 ↦ (𝑅 Σg (𝑐𝑁 ↦ ((𝑎𝑀𝑐)(.r𝑅)(𝑐(𝐽𝑀)𝑏))))) = ((𝐷𝑀) 1 ))
9919, 24, 983eqtr3d 2693 1 ((𝑀𝐵𝑅 ∈ CRing) → (𝑀 · (𝐽𝑀)) = ((𝐷𝑀) 1 ))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 383  w3a 1054   = wceq 1523  wcel 2030  wne 2823  Vcvv 3231  ifcif 4119  cotp 4218  cmpt 4762   × cxp 5141   Fn wfn 5921  wf 5922  cfv 5926  (class class class)co 6690  cmpt2 6692  𝑚 cmap 7899  Fincfn 7997  Basecbs 15904  .rcmulr 15989   ·𝑠 cvsca 15992  0gc0g 16147   Σg cgsu 16148  1rcur 18547  Ringcrg 18593  CRingccrg 18594   maMul cmmul 20237   Mat cmat 20261   maDet cmdat 20438   maAdju cmadu 20486
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-inf2 8576  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051  ax-addf 10053  ax-mulf 10054
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-xor 1505  df-tru 1526  df-fal 1529  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-ot 4219  df-uni 4469  df-int 4508  df-iun 4554  df-iin 4555  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-se 5103  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-isom 5935  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-of 6939  df-om 7108  df-1st 7210  df-2nd 7211  df-supp 7341  df-tpos 7397  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-2o 7606  df-oadd 7609  df-er 7787  df-map 7901  df-pm 7902  df-ixp 7951  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-fsupp 8317  df-sup 8389  df-oi 8456  df-card 8803  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-div 10723  df-nn 11059  df-2 11117  df-3 11118  df-4 11119  df-5 11120  df-6 11121  df-7 11122  df-8 11123  df-9 11124  df-n0 11331  df-xnn0 11402  df-z 11416  df-dec 11532  df-uz 11726  df-rp 11871  df-fz 12365  df-fzo 12505  df-seq 12842  df-exp 12901  df-hash 13158  df-word 13331  df-lsw 13332  df-concat 13333  df-s1 13334  df-substr 13335  df-splice 13336  df-reverse 13337  df-s2 13639  df-struct 15906  df-ndx 15907  df-slot 15908  df-base 15910  df-sets 15911  df-ress 15912  df-plusg 16001  df-mulr 16002  df-starv 16003  df-sca 16004  df-vsca 16005  df-ip 16006  df-tset 16007  df-ple 16008  df-ds 16011  df-unif 16012  df-hom 16013  df-cco 16014  df-0g 16149  df-gsum 16150  df-prds 16155  df-pws 16157  df-mre 16293  df-mrc 16294  df-acs 16296  df-mgm 17289  df-sgrp 17331  df-mnd 17342  df-mhm 17382  df-submnd 17383  df-grp 17472  df-minusg 17473  df-sbg 17474  df-mulg 17588  df-subg 17638  df-ghm 17705  df-gim 17748  df-cntz 17796  df-oppg 17822  df-symg 17844  df-pmtr 17908  df-psgn 17957  df-evpm 17958  df-cmn 18241  df-abl 18242  df-mgp 18536  df-ur 18548  df-ring 18595  df-cring 18596  df-oppr 18669  df-dvdsr 18687  df-unit 18688  df-invr 18718  df-dvr 18729  df-rnghom 18763  df-drng 18797  df-subrg 18826  df-lmod 18913  df-lss 18981  df-sra 19220  df-rgmod 19221  df-cnfld 19795  df-zring 19867  df-zrh 19900  df-dsmm 20124  df-frlm 20139  df-mamu 20238  df-mat 20262  df-mdet 20439  df-madu 20488
This theorem is referenced by:  madulid  20499  matinv  20531  cpmadurid  20720  cpmidgsum2  20732
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