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Similarity (conjugate) math problem

  1. Dec 22, 2008 #1
    my question is what is meant by saying that A and B are similar where A and B are nxn matrices with entries in field F, also show that is A~B then A^2~b^2

    first bit i have the definition for A~B is they are nxn matrices in the same field and there exists a non-singular square matrix P such that B=P^-1AP

    however i have no ideas about the second part, its only revision not homework so could someone please define this for me? thanks
  2. jcsd
  3. Dec 22, 2008 #2


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    Re: similarity(conjugate)

    A matrix A is similar to matrix B (both are n x n matrices) if there exists an invertible nxn matrix P such that A=P^(-1)BP. Use this definition and that of A to show that A^2 is similar to B^2.
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