Redraw Figure 4.3 for a 3 by 2 matrix of rank r 2. Which subspace is Z (zero vector only)? The nullspace part of any vector æ in R2 is æn

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.4: The Dot Product
Problem 45E
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Redraw Figure 4.3 for a 3 by 2 matrix of rank r = 2. Which subspace is Z (zero
vector only)? The nullspace part of any vector x in R² is n =
Transcribed Image Text:Redraw Figure 4.3 for a 3 by 2 matrix of rank r = 2. Which subspace is Z (zero vector only)? The nullspace part of any vector x in R² is n =
dim r
all combinations
of the rows
R"
all vectors
orthogonal
to the rows
dim n-r
Ax,-b
Ax=b
all combinations
b of the
dim r
columns
R
Ax=0
all vectors
orthogonal to
the columns
dim m-r
Figure 4.3: This update of Figure 4.2 shows the true action of A on x = x + In-
Row space vector + to column space, nullspace vector л to zero.
Transcribed Image Text:dim r all combinations of the rows R" all vectors orthogonal to the rows dim n-r Ax,-b Ax=b all combinations b of the dim r columns R Ax=0 all vectors orthogonal to the columns dim m-r Figure 4.3: This update of Figure 4.2 shows the true action of A on x = x + In- Row space vector + to column space, nullspace vector л to zero.
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