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Homework Help: Matrix Composition

  1. Sep 12, 2010 #1
    1. The problem statement, all variables and given/known data

    J represents a 3x2 matrix and H represents and 2x4 matrix. y = Hx and z = Jy, where y is a 2x1 matrix, z is a 3x1 matrix, and x is a 4x1 matrix. Form the composition J○H and simplify z = J○Hx.

    3. The attempt at a solution

    I don't know what my answer is going to look like because I don't know what a composition of matrices represents. Is it the same as matrix multiplication?
  2. jcsd
  3. Sep 12, 2010 #2


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    Science Advisor
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    Yes. And if the matrices are conformable (the right dimensions) you can multiply them.
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