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I have been trying to figure out for the past 2 hours and I have to say I give up. My last resort is that maybe someone will have time to explain this to me.

The task is to calculate matrix A= \begin{bmatrix} 12 & 65 & 65 \\ 3 & 13 & 0 \\ -4 & 0 & 13 \end{bmatrix}

  1. Into Hessenberg matrix A'.
  2. Find QR factorization for A' matrix using Givens rotations.

Thanks in advance!

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    It's an inverse matrix – 2017-01-06
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    Well, all of them I guess. But this homework is passed due already and I passed :) Not sure if I can close this question as irrelevant somehow. – 2017-01-07

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