Eigenvalues & Eigenvectorshard
0:00.0

Let u=(12121212)u = \begin{pmatrix} \frac{1}{2} \\ \frac{1}{2} \\ \frac{1}{2} \\ \frac{1}{2} \end{pmatrix} be a unit vector in R4\mathbb{R}^4. Let H=I2uuTH = I - 2uu^T be the corresponding Householder matrix. What is the trace of H5H^5?