I am not sure which category this goes in but I thought this fit best. I have a tensor x tensor x (when x is a vector) What would be the trace of this tensor? So tr(x tensor x) I thought it would be x ∙ x. Thanks
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If, for example, x= ai+ bj+ ck, in some coordinate system then x tensor x is represented, in that same coordinate system by . Yes, the trace of that is .
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