(a) Let A be an n n symmetric matrix, and let v be an eigenvector. Prove...

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(a) Let A be an n × n symmetric matrix, and let v be an eigenvector. Prove that its orthogonal complement under the dot product, namely, V⊥ = {w ∈ Rn | v1· w = 0}, is an invariant subspace. 

(b) More generally, prove that if W ⊂ Rn is an invariant subspace, then its orthogonal complement W, is also invariant.

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Applied Linear Algebra

ISBN: 9783319910406

2nd Edition

Authors: Peter J. Olver, Chehrzad Shakiban

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