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논문번역/2012년스터디/김태진


Pattern

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Linear Algebra and its applications


1.7 Linear Independence

Section 1.5 . , Ax=0 .
, (1) .
x1=x2=x3=0 . Section 1.5 , ().
Definition
... Rn (linearly independent). (2) 0 .

(2) 0 v1...vp linear independence relation( 계). 그 . 간 , {v1,,,vp} v1...vp . .

Linear Independence of Matrix Columns
A= . 그 Ax=0 ... . A 각각 Ax=0 . 그 .
---
A Ax=0 . (3)
---

Set of One or Two Vectors
v v 0 . x1v=0 v=0 갖기 . x1*0=0 .
. 3 . Row operation . scalar times( /곱?) .
---
{v1, v2} . 그 .
---
, . Figure 1 3 .

Set of Two or More Vectors
개거
3 . .

Theorem 7
Characterization of Linearly Dependent Sets

개거 S={v1...vp} S (). , S 고 v1=0 vj(j>1) .

: 7 . . 3 . 4 uv R3(3) {u,v,w} . 그 {u,v,w} w u v span() ().
. , 8 .

1.8 Linear Transformations

Ax=b associated(?) x1a1+...+xnan=b . 그, Ax=b . A Ax x "" .
, ... b x u A . Fig1 .
, Ax=b A "" under R2 b R4 x .
x Ax간 . .
Rn Rm T 각 Rm T(x) Rn . Rn T 고, Rm T . T: Rn -> Rm T Rn고 공 Rm . Rn 각 x , Rm T(x) x . T(x) T .
-간 곱 (that evolve over time) . Chapter5 1.10, 4.8, 4.9 .

Matrix Transformations
기() . Rn 각각 x , T(x) A m*n Ax. x->Ax . T A n개 Rn고, T A 각각 m개 Rm . T A , 각 T(x) Ax .

Linear Transformations
1.4 5 A m*n x->Ax c Rn u,v A(u+v) = Au + Av A(cu)=cAu . .
Definition
(or ) T 1,2 .
(i) T u,v T(u+v) = T(u) + T(v)
(ii) T c u T(cu) = cT(u)
. 4,5 .
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