Ononot — Let A = \begin{pmatrix} 1 & 1 \\ 0 & 2 \end{pmatrix} and B =

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Eigenvalues & Eigenvectorshard

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Let $A = \begin{pmatrix} 1 & 1 \\ 0 & 2 \end{pmatrix}$ and $B = \begin{pmatrix} 3 & 0 \\ 0 & 4 \end{pmatrix}$ . The Kronecker sum is defined as $A \oplus B = A \otimes I_2 + I_2 \otimes B$ . What are the eigenvalues of $A \oplus B$ ?