Strict Hurwitz property of polynomials under coefficient perturbation

A simple procedure for computing the allowable interval coefficient perturbations of a strictly stable polynomial is presented. The amount of computations involved is very little, while the procedure is able to handle the case where the relative uncertainty of the polynomial coefficients are not known. It can also handle the case of linearly dependent parameter uncertainties. The procedure can also be modified to treat the case of simple nonlinear dependent parameter uncertainties. The details of the modified procedure will depend on the nature of the nonlinearity