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What can you say about these?

  1. Dec 13, 2009 #1
    You have a matrix A such that N(A) = C(A), what can you say about A2? Why?
     
  2. jcsd
  3. Dec 14, 2009 #2
    if the columns of A is in the nullspace of A, what is the answer to A*A?
     
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