If A is a positive definite matrix and B is positive semi-definite, show that trace (AB) 2 O with equality if and only if B = 0.

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter2: Matrices
Section2.1: Operations With Matrices
Problem 72E: Show that no 22 matrices A and B exist that satisfy the matrix equation. AB-BA=1001.
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If A is a positive definite matrix and B is
positive semi-definite, show that trace (AB)
2 O with equality if and only if B = 0.
Transcribed Image Text:If A is a positive definite matrix and B is positive semi-definite, show that trace (AB) 2 O with equality if and only if B = 0.
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