The pseudozero set of a polynomial $p$ is the set of all the zeros of all
the polynomials that are near to $p$. Some explicit formulas have been
provided to compute this set. In this talk, we give some applications of 
this notion. We present a numeric-symbolic algorithm to compute the
stability radius of a polynomial. We give some numerical experiments.

An interval polynomial is a polynomial whose coefficients are real intervals.
The zeros of an interval polynomial are the zeros of polynomials with real 
coefficients belonging to the interval coefficients of the interval polynomial.
We show how to draw the zeros of interval polynomial thanks to the notion
of pseudozeros. We present a Matlab tool to compute this set.