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  1. C

    Minimal polynomial, transpose, similar

    Homework Statement a) Prove that if a polynomial f(lambda) has f(A)=0, then f(AT)=0 b) Prove that A and AT have the same minimal polynomial. c) If A has a cyclic vector, prove that AT is similar to A. 2. The attempt at a solution a) I know that I need to show that f(AT) =...
  2. C

    Cauchy Sequences Proof

    Hi, I need to prove that any infinite subsequence {xnk}of a Cauchy sequence {xn}is a Cauchy sequence equivalent to {xn}. My problem is that it seemed way too easy, so I'm concerned that I missed something. Please see the attachment for my solution, and let me know what you think. Thanks.
  3. C

    Binary Decimals - Dual Expansion

    Hi, I'm trying to prove that there's a bijection between the open interval (0,1) and the set of all sequences whose elements are 0 or 1 in order to show cardinality continuum. So let C={a1, a2, a3,...|ai is either 0 or 1} which is the set of all sequences of 0's and 1's and let...
  4. C

    Elementary Row Operations - only need two?

    I was reading that the "exchange rows" operation can be achieved through the other two operations: multiplication by a nonzero number and adding a multiple of one row to another. Any thoughts on the actual algorithm for achieving an exchange of rows through these other two operations? I...
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