Question: Set A = magic(4) and t = trace(A). The scalar t should be an eigenvalue of A, and the remaining eigenvalues should add up to

Set A = magic(4) and t = trace(A). The scalar t should be an eigenvalue of A, and the remaining eigenvalues should add up to zero. Why? Explain. Use MATLAB to verify that A - tl is singular. Compute the eigenvalues of A and a matrix X of eigenvectors. Determine the condition numbers of A and X. Is the eigenvalue problem well-conditioned? Explain. Perturb A by setting
A1 = A + 1.0e-04 * rand(4)
How do the eigenvalues of Al compare to those of A?

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Since A is a magic square the row sums of A tI will all be 0 Thus the row ve... View full answer

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