et u be a vector in R" such that u'u = 1, and let A denote the (n x n) matrix A = --2uu". Is A symmetric? Is A orthogonal? Calculate Au.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter7: Distance And Approximation
Section7.4: The Singular Value Decomposition
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Let u be a vector in R" such that uTu = 1, and let A denote the (n x n) matrix A =
I-2uu".
• Is A symmetric?
• Is A orthogonal?
• Calculate A.
• Suppose that w is in R" and u"w = 0. What is
Aw?
• Give the eigenvalues of A and give the
geometric multiplicity for each eignevalue.
Transcribed Image Text:Let u be a vector in R" such that uTu = 1, and let A denote the (n x n) matrix A = I-2uu". • Is A symmetric? • Is A orthogonal? • Calculate A. • Suppose that w is in R" and u"w = 0. What is Aw? • Give the eigenvalues of A and give the geometric multiplicity for each eignevalue.
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