Linear Algebra, Numpy, Python, Eigenvectors, Determinants.
is another operator that only exists for square matrices. It is defined as the sum of the values in the main diagonal and is denoted as tr(A). So for a 3x3 matrix, the trace of the matrix is 𝑡𝑟(𝐴)=𝑎1,1+𝑎2,2+𝑎3,3 Taking the 3x3 matrix example from the previous section. the trace of this matrix is