trace AND determinant

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description

• sum the diagonal elements in a square matrix

• The trace is a linear function of the entries of the matrix.

• $traceA=trace{A}^T$ for any square matrix A.

• $traceAB=traceBA$ for any matrices $A\in R^{n\times m},B\in R^{m\times n}$.

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• determinant: lec 2 - determinant