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Homework Help: Linear Algebra (Matrices)

  1. May 16, 2007 #1


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    1. The problem statement, all variables and given/known data

    Lets say A = a matrix.

    What is meant by the question [tex]A - I_3[/tex] ???

    I dont understand what the I means and im only given one matrix.... a 3x3 matrix listed as A
    Last edited: May 16, 2007
  2. jcsd
  3. May 16, 2007 #2


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    Science Advisor
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    I_3 is a 3x3 identity matrix - ones down the diagonal and zeros elsewhere.
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