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How would you make this statement, AB=BA true

  1. Oct 31, 2012 #1
    1. The problem statement, all variables and given/known data

    If A is a matrix, find B, a matrix so that

    AB=BA


    2. Relevant equations

    ?

    3. The attempt at a solution

    Solve for inverse?
     
  2. jcsd
  3. Oct 31, 2012 #2

    Dick

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    Science Advisor
    Homework Helper

    B=I (the identity) always works. Or B=A. Or B=A^2. Or any combination of powers of A.
     
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