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Definition df-mat 20033
 Description: Define the algebra of n x n matrices over a ring r. (Contributed by Stefan O'Rear, 31-Aug-2015.)
Assertion
Ref Expression
df-mat Mat = (𝑛 ∈ Fin, 𝑟 ∈ V ↦ ((𝑟 freeLMod (𝑛 × 𝑛)) sSet ⟨(.r‘ndx), (𝑟 maMul ⟨𝑛, 𝑛, 𝑛⟩)⟩))
Distinct variable group:   𝑛,𝑟

Detailed syntax breakdown of Definition df-mat
StepHypRef Expression
1 cmat 20032 . 2 class Mat
2 vn . . 3 setvar 𝑛
3 vr . . 3 setvar 𝑟
4 cfn 7841 . . 3 class Fin
5 cvv 3173 . . 3 class V
63cv 1474 . . . . 5 class 𝑟
72cv 1474 . . . . . 6 class 𝑛
87, 7cxp 5036 . . . . 5 class (𝑛 × 𝑛)
9 cfrlm 19909 . . . . 5 class freeLMod
106, 8, 9co 6549 . . . 4 class (𝑟 freeLMod (𝑛 × 𝑛))
11 cnx 15692 . . . . . 6 class ndx
12 cmulr 15769 . . . . . 6 class .r
1311, 12cfv 5804 . . . . 5 class (.r‘ndx)
147, 7, 7cotp 4133 . . . . . 6 class 𝑛, 𝑛, 𝑛
15 cmmul 20008 . . . . . 6 class maMul
166, 14, 15co 6549 . . . . 5 class (𝑟 maMul ⟨𝑛, 𝑛, 𝑛⟩)
1713, 16cop 4131 . . . 4 class ⟨(.r‘ndx), (𝑟 maMul ⟨𝑛, 𝑛, 𝑛⟩)⟩
18 csts 15693 . . . 4 class sSet
1910, 17, 18co 6549 . . 3 class ((𝑟 freeLMod (𝑛 × 𝑛)) sSet ⟨(.r‘ndx), (𝑟 maMul ⟨𝑛, 𝑛, 𝑛⟩)⟩)
202, 3, 4, 5, 19cmpt2 6551 . 2 class (𝑛 ∈ Fin, 𝑟 ∈ V ↦ ((𝑟 freeLMod (𝑛 × 𝑛)) sSet ⟨(.r‘ndx), (𝑟 maMul ⟨𝑛, 𝑛, 𝑛⟩)⟩))
211, 20wceq 1475 1 wff Mat = (𝑛 ∈ Fin, 𝑟 ∈ V ↦ ((𝑟 freeLMod (𝑛 × 𝑛)) sSet ⟨(.r‘ndx), (𝑟 maMul ⟨𝑛, 𝑛, 𝑛⟩)⟩))
 Colors of variables: wff setvar class This definition is referenced by:  matbas0pc  20034  matbas0  20035  matval  20036  matrcl  20037  mdetfval  20211  madufval  20262
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