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Homework Help: Matrix problem

  1. Jun 10, 2007 #1
    1. The problem statement, all variables and given/known data

    We are to show that (A)(A^T) is a symmetric matrix using tensor notation.

    Where ^T denotes TRANSPOSE
    2. Relevant equations
    3. The attempt at a solution

    I did it in the following way:
    Let P=(A)(A^T)
    p_ik=(a_ij)(a_jk) Where A=a_ij and A^T=a_jk

    hence proved.
    Please tell if I am correct.
  2. jcsd
  3. Sep 7, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper

    It seems right.
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