(b) If P is the projection on ce M of a Hilbert space H th riant under an operator T

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter7: Distance And Approximation
Section7.2: Norms And Distance Functions
Problem 33EQ
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Q.13

(b) If P is the projection on a closed linear sub-
space M of a Hilbert space H then prove that M is
invariant under an operator T if and only if TP =
PTP.
Transcribed Image Text:(b) If P is the projection on a closed linear sub- space M of a Hilbert space H then prove that M is invariant under an operator T if and only if TP = PTP.
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