Root neighborhoods of a polynomial
Mathematics of Computation
Mathematics for computer algebra
Mathematics for computer algebra
Spectral value sets: a graphical tool for robustness analysis
Systems & Control Letters
Optimization by Vector Space Methods
Optimization by Vector Space Methods
Numerical Polynomial Algebra
Rounding Errors in Algebraic Processes
Rounding Errors in Algebraic Processes
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Interval polynomials are useful to describe perturbed polynomials. We present a graphical tool to describe how perturbations of the polynomial coefficients affect its zeros without using interval arithmetic nor matrix representation. This tool implements real pseudozero set that differ from the well known complex pseudozero set restricting perturbations to be real and applied to real polynomials. We introduce a computable formula for this real pseudozero set and compare complex and real pseudozero sets. We propose a graphical MATLAB interface to draw zeros of such interval polynomials.