Take an airplane... it’s dynamics are described by a series of differential equations. We want to know if it’s stable! If the wife values of the dynamics are

Take an airplane... it’s dynamics are described by a series of differential equations. We want to know if it’s stable! If the wife values of the dynamics are real and greater than 1 it’s unstable. If the eigenvalues are complex and have a modulus greater than 1 it will oscillate instability. If one is equal to one, it will cause everyone to vomit.