Illustrator for Complex Eigenvalues and Eigenvectors
Use the slider with values of d, -2<d<2, to get complex eigenvalues from the quadratic equation x^2-dx+1=0. If d = 2 cos(2pi/k) then there will be a cycle of k points. If abs(d)>=2 then there will be real eigenvalues.
Dr. John Gresham
Tarleton State University