8.3.6 ND Suppose that A is skew-hermitian (A“ = -A). (a) Prove that iA is hermitian. (b) Prove that the eigenvalues of A are pure imaginary.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter5: Orthogonality
Section5.3: The Gram-schmidt Process And The Qr Factorization
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8.3.6 ND Suppose that A is skew-hermitian (A" = -A).
(a) Prove that iA is hermitian.
(b) Prove that the eigenvalues of A are pure imaginary.
Transcribed Image Text:8.3.6 ND Suppose that A is skew-hermitian (A" = -A). (a) Prove that iA is hermitian. (b) Prove that the eigenvalues of A are pure imaginary.
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