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How do you evaluate a norm like this?

  1. Apr 28, 2012 #1

    where A is an mxn matrix, x and z are vectors in R^n, b is a vector in R^m, and α is a scalar.
  2. jcsd
  3. Apr 30, 2012 #2


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    I don't really understand the question. A(x+αz)-b is a vector in Rm, so you just calculate its norm
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