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Thread: Is this question correctly asked?

  1. #1
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    Is this question correctly asked?

    Hey guys,

    I just want to know if this question is missing an x after the (A^T A). Does the question given make sense?
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  2. #2
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    Re: Is this question correctly asked?

    $x^T (A^T A)$ is a $1\times n$ vector so saying

    $x^T (A^T A) \geq 0$ doesn't make a whole lot of sense.

    Yes, they probably mean $x^T(A^T A)x$
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