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What does X'X mean ?

  1. Oct 29, 2012 #1
    What does X'X mean ?
     
  2. jcsd
  3. Oct 29, 2012 #2
    Apparently it has something to do with a matrix.
     
  4. Oct 29, 2012 #3

    MarneMath

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  5. Oct 29, 2012 #4
  6. Oct 29, 2012 #5

    hotvette

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    In linear algebra, ' is often used to indicate Transpose. So X'X = XTX.
     
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