Label the following statements as being true or false. Assume that the underlying inner product spaces are finite-dimensional. (a) All projections are self-adjoint. (b) An orthogonal projection is uniquely determined by its range. (c) Every self-adjoint operator is a linear combination of orthogonal projections. (d) If an operator possesses a spectral decomposition, then so does its adjoint. (e) If T is a projection on W, then T(x) is the vector in W that is closest to x. (f) Every orthogonal projection is a unitary operator.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.6: The Matrix Of A Linear Transformation
Problem 43EQ
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Label the following statements as being true or false. Assume that the
underlying inner product spaces are finite-dimensional.
(a) All projections are self-adjoint.
(b) An orthogonal projection is uniquely determined by its range.
(c) Every self-adjoint operator is a linear combination of orthogonal
projections.
(d) If an operator possesses a spectral decomposition, then so does its
adjoint.
(e) If T is a projection on W, then T(x) is the vector in W that is closest to x.
(f) Every orthogonal projection is a unitary operator.
Transcribed Image Text:Label the following statements as being true or false. Assume that the underlying inner product spaces are finite-dimensional. (a) All projections are self-adjoint. (b) An orthogonal projection is uniquely determined by its range. (c) Every self-adjoint operator is a linear combination of orthogonal projections. (d) If an operator possesses a spectral decomposition, then so does its adjoint. (e) If T is a projection on W, then T(x) is the vector in W that is closest to x. (f) Every orthogonal projection is a unitary operator.
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