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## Homework Statement

Hi,

Is there a matrix property that can be applied to take the square of a column vector?

Something like:

[itex]{\bf x}=\left[x_1,x_2,x_3\right]^T[/itex]

[itex]\left[{\bf x}\right]^2[/itex]

[itex]={\bf x}{\bf x}^T[/itex]

or

[itex]={\bf x}^T{\bf x}[/itex]?

Thank you.