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Homework Help: Elementary matrix

  1. Sep 28, 2006 #1
    Elementary matrix is constructed out of identity for gaussian elimination, it's easier to see it on an example:
    if A =
    1 2 3
    4 5 6
    7 8 9
    and E
    1 0 0
    -4 1 0
    0 0 1
    then EA =
    1 2 3
    0 -3 -6
    7 8 9

    so now the problem asks how are rows of EM related to the rows of M if E is
    1 1 1
    0 0 0
    where M is arbitrary any matrix.

    thank you in advance.
     
  2. jcsd
  3. Sep 28, 2006 #2
    I dont know if I understand you correctly

    M will be 3x2 matrix and EM will 2x2 matrix where with a summation of the each row in M - a(11) summation of first row and a(12) of second row. Rest will be zero
     
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