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How can we proof this matrix norm equality?

  1. Dec 18, 2011 #1
    ||A-1|| = max ||x|| / ||Ax|| x[itex]\in[/itex]ℝn, x≠0 . x is a vector.
     
  2. jcsd
  3. Dec 18, 2011 #2

    mathwonk

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    well try the reciprocal one, for the norm of A. (operator norm of course, assuming you know the definition. that's the place to start of course.)
     
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