Let A € M3 be normal and suppose that 1, i, and 2 + 2i are its eigenvalues. (a) Use (13.6.1) to draw a region in the com
Posted: Fri Jul 08, 2022 5:38 am
Let A € M3 be normal and suppose that 1, i, and 2 + 2i are its eigenvalues. (a) Use (13.6.1) to draw a region in the complex plane that must contain the diagonal entries of A. (b) Could 2i be a diagonal entry of A? How about -1 or 1+ i? (c) Why must every main diagonal entry of A have nonnegative real part? (d) How large could the real part of a diagonal entry be?