Is that true? Any counter-example?

  • 3
    $\begingroup$ any linear transformation, isomorphism or not, can be represented by a matrix (which is finite if the dimensions are finite). $\endgroup$ Nov 4 '15 at 9:56
  • $\begingroup$ An isomorphism is simply an invertible linear map from one vector space to another, and hence, can be represented by a matrix. $\endgroup$
    – MrMazgari
    Nov 4 '15 at 9:59

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