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Math Help - difference between formulas question

  1. #1
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    difference between formulas question

    what is the difference between
    D=p^-1 A P
    and

    D=p^t A P

    i know then one of them is for diagonalisation of A

    what is the purpose of the other?
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  2. #2
    Master Of Puppets
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    Re: difference between formulas question

    The first equation is for the diagonalisation. Otherwise consider P^TP = I
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  3. #3
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    Re: difference between formulas question

    If P is orthogonal, P^T= P^{-1} so that those are the same.
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  4. #4
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    Re: difference between formulas question

    ok ,thanks
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