Proof of Theorem matinv
| Step | Hyp | Ref | Expression | 
|---|
| 1 |  | matinv.b | . 2
⊢ 𝐵 = (Base‘𝐴) | 
| 2 |  | eqid 2736 | . 2
⊢
(.r‘𝐴) = (.r‘𝐴) | 
| 3 |  | eqid 2736 | . 2
⊢
(1r‘𝐴) = (1r‘𝐴) | 
| 4 |  | matinv.u | . 2
⊢ 𝑈 = (Unit‘𝐴) | 
| 5 |  | matinv.i | . 2
⊢ 𝐼 = (invr‘𝐴) | 
| 6 |  | matinv.a | . . . . . . 7
⊢ 𝐴 = (𝑁 Mat 𝑅) | 
| 7 | 6, 1 | matrcl 22417 | . . . . . 6
⊢ (𝑀 ∈ 𝐵 → (𝑁 ∈ Fin ∧ 𝑅 ∈ V)) | 
| 8 | 7 | simpld 494 | . . . . 5
⊢ (𝑀 ∈ 𝐵 → 𝑁 ∈ Fin) | 
| 9 | 8 | 3ad2ant2 1134 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝑁 ∈ Fin) | 
| 10 |  | simp1 1136 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝑅 ∈ CRing) | 
| 11 | 6 | matassa 22451 | . . . 4
⊢ ((𝑁 ∈ Fin ∧ 𝑅 ∈ CRing) → 𝐴 ∈ AssAlg) | 
| 12 | 9, 10, 11 | syl2anc 584 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝐴 ∈ AssAlg) | 
| 13 |  | assaring 21882 | . . 3
⊢ (𝐴 ∈ AssAlg → 𝐴 ∈ Ring) | 
| 14 | 12, 13 | syl 17 | . 2
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝐴 ∈ Ring) | 
| 15 |  | simp2 1137 | . 2
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝑀 ∈ 𝐵) | 
| 16 |  | assalmod 21881 | . . . 4
⊢ (𝐴 ∈ AssAlg → 𝐴 ∈ LMod) | 
| 17 | 12, 16 | syl 17 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝐴 ∈ LMod) | 
| 18 |  | crngring 20243 | . . . . . 6
⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring) | 
| 19 | 18 | 3ad2ant1 1133 | . . . . 5
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝑅 ∈ Ring) | 
| 20 |  | simp3 1138 | . . . . 5
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐷‘𝑀) ∈ 𝑉) | 
| 21 |  | matinv.v | . . . . . 6
⊢ 𝑉 = (Unit‘𝑅) | 
| 22 |  | matinv.h | . . . . . 6
⊢ 𝐻 = (invr‘𝑅) | 
| 23 |  | eqid 2736 | . . . . . 6
⊢
(Base‘𝑅) =
(Base‘𝑅) | 
| 24 | 21, 22, 23 | ringinvcl 20393 | . . . . 5
⊢ ((𝑅 ∈ Ring ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐻‘(𝐷‘𝑀)) ∈ (Base‘𝑅)) | 
| 25 | 19, 20, 24 | syl2anc 584 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐻‘(𝐷‘𝑀)) ∈ (Base‘𝑅)) | 
| 26 | 6 | matsca2 22427 | . . . . . 6
⊢ ((𝑁 ∈ Fin ∧ 𝑅 ∈ CRing) → 𝑅 = (Scalar‘𝐴)) | 
| 27 | 9, 10, 26 | syl2anc 584 | . . . . 5
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝑅 = (Scalar‘𝐴)) | 
| 28 | 27 | fveq2d 6909 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (Base‘𝑅) = (Base‘(Scalar‘𝐴))) | 
| 29 | 25, 28 | eleqtrd 2842 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐻‘(𝐷‘𝑀)) ∈ (Base‘(Scalar‘𝐴))) | 
| 30 |  | matinv.j | . . . . . 6
⊢ 𝐽 = (𝑁 maAdju 𝑅) | 
| 31 | 6, 30, 1 | maduf 22648 | . . . . 5
⊢ (𝑅 ∈ CRing → 𝐽:𝐵⟶𝐵) | 
| 32 | 31 | 3ad2ant1 1133 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → 𝐽:𝐵⟶𝐵) | 
| 33 | 32, 15 | ffvelcdmd 7104 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐽‘𝑀) ∈ 𝐵) | 
| 34 |  | eqid 2736 | . . . 4
⊢
(Scalar‘𝐴) =
(Scalar‘𝐴) | 
| 35 |  | matinv.t | . . . 4
⊢  ∙ = (
·𝑠 ‘𝐴) | 
| 36 |  | eqid 2736 | . . . 4
⊢
(Base‘(Scalar‘𝐴)) = (Base‘(Scalar‘𝐴)) | 
| 37 | 1, 34, 35, 36 | lmodvscl 20877 | . . 3
⊢ ((𝐴 ∈ LMod ∧ (𝐻‘(𝐷‘𝑀)) ∈ (Base‘(Scalar‘𝐴)) ∧ (𝐽‘𝑀) ∈ 𝐵) → ((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀)) ∈ 𝐵) | 
| 38 | 17, 29, 33, 37 | syl3anc 1372 | . 2
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀)) ∈ 𝐵) | 
| 39 | 1, 34, 36, 35, 2 | assaassr 21880 | . . . 4
⊢ ((𝐴 ∈ AssAlg ∧ ((𝐻‘(𝐷‘𝑀)) ∈ (Base‘(Scalar‘𝐴)) ∧ 𝑀 ∈ 𝐵 ∧ (𝐽‘𝑀) ∈ 𝐵)) → (𝑀(.r‘𝐴)((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀))) = ((𝐻‘(𝐷‘𝑀)) ∙ (𝑀(.r‘𝐴)(𝐽‘𝑀)))) | 
| 40 | 12, 29, 15, 33, 39 | syl13anc 1373 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝑀(.r‘𝐴)((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀))) = ((𝐻‘(𝐷‘𝑀)) ∙ (𝑀(.r‘𝐴)(𝐽‘𝑀)))) | 
| 41 |  | matinv.d | . . . . . 6
⊢ 𝐷 = (𝑁 maDet 𝑅) | 
| 42 | 6, 1, 30, 41, 3, 2, 35 | madurid 22651 | . . . . 5
⊢ ((𝑀 ∈ 𝐵 ∧ 𝑅 ∈ CRing) → (𝑀(.r‘𝐴)(𝐽‘𝑀)) = ((𝐷‘𝑀) ∙
(1r‘𝐴))) | 
| 43 | 15, 10, 42 | syl2anc 584 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝑀(.r‘𝐴)(𝐽‘𝑀)) = ((𝐷‘𝑀) ∙
(1r‘𝐴))) | 
| 44 | 43 | oveq2d 7448 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀)) ∙ (𝑀(.r‘𝐴)(𝐽‘𝑀))) = ((𝐻‘(𝐷‘𝑀)) ∙ ((𝐷‘𝑀) ∙
(1r‘𝐴)))) | 
| 45 |  | eqid 2736 | . . . . . . . 8
⊢
(.r‘𝑅) = (.r‘𝑅) | 
| 46 |  | eqid 2736 | . . . . . . . 8
⊢
(1r‘𝑅) = (1r‘𝑅) | 
| 47 | 21, 22, 45, 46 | unitlinv 20394 | . . . . . . 7
⊢ ((𝑅 ∈ Ring ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀))(.r‘𝑅)(𝐷‘𝑀)) = (1r‘𝑅)) | 
| 48 | 19, 20, 47 | syl2anc 584 | . . . . . 6
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀))(.r‘𝑅)(𝐷‘𝑀)) = (1r‘𝑅)) | 
| 49 | 27 | fveq2d 6909 | . . . . . . 7
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (.r‘𝑅) =
(.r‘(Scalar‘𝐴))) | 
| 50 | 49 | oveqd 7449 | . . . . . 6
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀))(.r‘𝑅)(𝐷‘𝑀)) = ((𝐻‘(𝐷‘𝑀))(.r‘(Scalar‘𝐴))(𝐷‘𝑀))) | 
| 51 | 27 | fveq2d 6909 | . . . . . 6
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (1r‘𝑅) =
(1r‘(Scalar‘𝐴))) | 
| 52 | 48, 50, 51 | 3eqtr3d 2784 | . . . . 5
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀))(.r‘(Scalar‘𝐴))(𝐷‘𝑀)) =
(1r‘(Scalar‘𝐴))) | 
| 53 | 52 | oveq1d 7447 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (((𝐻‘(𝐷‘𝑀))(.r‘(Scalar‘𝐴))(𝐷‘𝑀)) ∙
(1r‘𝐴)) =
((1r‘(Scalar‘𝐴)) ∙
(1r‘𝐴))) | 
| 54 | 23, 21 | unitcl 20376 | . . . . . . 7
⊢ ((𝐷‘𝑀) ∈ 𝑉 → (𝐷‘𝑀) ∈ (Base‘𝑅)) | 
| 55 | 54 | 3ad2ant3 1135 | . . . . . 6
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐷‘𝑀) ∈ (Base‘𝑅)) | 
| 56 | 55, 28 | eleqtrd 2842 | . . . . 5
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝐷‘𝑀) ∈ (Base‘(Scalar‘𝐴))) | 
| 57 | 1, 3 | ringidcl 20263 | . . . . . 6
⊢ (𝐴 ∈ Ring →
(1r‘𝐴)
∈ 𝐵) | 
| 58 | 14, 57 | syl 17 | . . . . 5
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (1r‘𝐴) ∈ 𝐵) | 
| 59 |  | eqid 2736 | . . . . . 6
⊢
(.r‘(Scalar‘𝐴)) =
(.r‘(Scalar‘𝐴)) | 
| 60 | 1, 34, 35, 36, 59 | lmodvsass 20886 | . . . . 5
⊢ ((𝐴 ∈ LMod ∧ ((𝐻‘(𝐷‘𝑀)) ∈ (Base‘(Scalar‘𝐴)) ∧ (𝐷‘𝑀) ∈ (Base‘(Scalar‘𝐴)) ∧
(1r‘𝐴)
∈ 𝐵)) → (((𝐻‘(𝐷‘𝑀))(.r‘(Scalar‘𝐴))(𝐷‘𝑀)) ∙
(1r‘𝐴)) =
((𝐻‘(𝐷‘𝑀)) ∙ ((𝐷‘𝑀) ∙
(1r‘𝐴)))) | 
| 61 | 17, 29, 56, 58, 60 | syl13anc 1373 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (((𝐻‘(𝐷‘𝑀))(.r‘(Scalar‘𝐴))(𝐷‘𝑀)) ∙
(1r‘𝐴)) =
((𝐻‘(𝐷‘𝑀)) ∙ ((𝐷‘𝑀) ∙
(1r‘𝐴)))) | 
| 62 |  | eqid 2736 | . . . . . 6
⊢
(1r‘(Scalar‘𝐴)) =
(1r‘(Scalar‘𝐴)) | 
| 63 | 1, 34, 35, 62 | lmodvs1 20889 | . . . . 5
⊢ ((𝐴 ∈ LMod ∧
(1r‘𝐴)
∈ 𝐵) →
((1r‘(Scalar‘𝐴)) ∙
(1r‘𝐴)) =
(1r‘𝐴)) | 
| 64 | 17, 58, 63 | syl2anc 584 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) →
((1r‘(Scalar‘𝐴)) ∙
(1r‘𝐴)) =
(1r‘𝐴)) | 
| 65 | 53, 61, 64 | 3eqtr3d 2784 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀)) ∙ ((𝐷‘𝑀) ∙
(1r‘𝐴))) =
(1r‘𝐴)) | 
| 66 | 40, 44, 65 | 3eqtrd 2780 | . 2
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝑀(.r‘𝐴)((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀))) = (1r‘𝐴)) | 
| 67 | 1, 34, 36, 35, 2 | assaass 21879 | . . . 4
⊢ ((𝐴 ∈ AssAlg ∧ ((𝐻‘(𝐷‘𝑀)) ∈ (Base‘(Scalar‘𝐴)) ∧ (𝐽‘𝑀) ∈ 𝐵 ∧ 𝑀 ∈ 𝐵)) → (((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀))(.r‘𝐴)𝑀) = ((𝐻‘(𝐷‘𝑀)) ∙ ((𝐽‘𝑀)(.r‘𝐴)𝑀))) | 
| 68 | 12, 29, 33, 15, 67 | syl13anc 1373 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀))(.r‘𝐴)𝑀) = ((𝐻‘(𝐷‘𝑀)) ∙ ((𝐽‘𝑀)(.r‘𝐴)𝑀))) | 
| 69 | 6, 1, 30, 41, 3, 2, 35 | madulid 22652 | . . . . 5
⊢ ((𝑀 ∈ 𝐵 ∧ 𝑅 ∈ CRing) → ((𝐽‘𝑀)(.r‘𝐴)𝑀) = ((𝐷‘𝑀) ∙
(1r‘𝐴))) | 
| 70 | 15, 10, 69 | syl2anc 584 | . . . 4
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐽‘𝑀)(.r‘𝐴)𝑀) = ((𝐷‘𝑀) ∙
(1r‘𝐴))) | 
| 71 | 70 | oveq2d 7448 | . . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → ((𝐻‘(𝐷‘𝑀)) ∙ ((𝐽‘𝑀)(.r‘𝐴)𝑀)) = ((𝐻‘(𝐷‘𝑀)) ∙ ((𝐷‘𝑀) ∙
(1r‘𝐴)))) | 
| 72 | 68, 71, 65 | 3eqtrd 2780 | . 2
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀))(.r‘𝐴)𝑀) = (1r‘𝐴)) | 
| 73 | 1, 2, 3, 4, 5, 14,
15, 38, 66, 72 | invrvald 22683 | 1
⊢ ((𝑅 ∈ CRing ∧ 𝑀 ∈ 𝐵 ∧ (𝐷‘𝑀) ∈ 𝑉) → (𝑀 ∈ 𝑈 ∧ (𝐼‘𝑀) = ((𝐻‘(𝐷‘𝑀)) ∙ (𝐽‘𝑀)))) |