Suppose the factorization below is an SVD of a matrix A, with the entries in U and V rounded to two decimal places. .40 -.78 .47 7.10 A = .37 -.33 -.87 3.10 -.84 -.52 -.16 .30 -.51 –.81 .76 .64 -.12 .58 -.58 .58 a. What is the rank of A? b. Use this decomposition of A, with no calculations, to write a basis for Col A and a basis for Nul A. [Hint: First write the columns of V.]

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.5: Subspaces, Basis, Dimension, And Rank
Problem 63EQ
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Suppose the factorization below is an SVD of a matrix A, with the entries in U and V rounded to two decimal places.
.40 -.78
.47
7.10
A =
.37 -.33 -.87
3.10
-.84 -.52 -.16
.30 -.51 –.81
.76
.64 -.12
.58 -.58
.58
a. What is the rank of A?
b. Use this decomposition of A, with no calculations, to write a basis for Col A and a basis for Nul A. [Hint: First write the
columns of V.]
Transcribed Image Text:Suppose the factorization below is an SVD of a matrix A, with the entries in U and V rounded to two decimal places. .40 -.78 .47 7.10 A = .37 -.33 -.87 3.10 -.84 -.52 -.16 .30 -.51 –.81 .76 .64 -.12 .58 -.58 .58 a. What is the rank of A? b. Use this decomposition of A, with no calculations, to write a basis for Col A and a basis for Nul A. [Hint: First write the columns of V.]
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