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Thread: the set of all possible nXn covariance matrices....

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    the set of all possible nXn covariance matrices....




    ....is infinite countable or uncountable?
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    Re: the set of all possible nXn covariance matrices....

    Well since \sigma^2 I_{nxn} is a valid covariance matrix for any \sigma^2 \in \mathbb{R} the answer is uncountable.
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    Re: the set of all possible nXn covariance matrices....


    Thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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