Question: ( Homework ) Prove the equality | | x - x D L | | Q 2 = | | S - S D L

(Homework) Prove the equality ||x-xDL||Q2=||S-SDL||F2.
[Hint: E is a semiunitary matrix, i.e.,ETE=IN.]
(Homework) Prove the equality ||x-xDL||Q2=||S-SDL||F2. [Hint: E is a semiunitary matrix,

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