Comments on "A note on two methods related to stability robustness of polynomials in a sector (Relative stability)"
Mohammad Bozorg, E. Nebot · IEEE Transactions on Automatic Control · 1997
In this paper, it is shown that the results of the above-mentioned paper (Katbab and Jury, 1993) are incorrect for the case of complex coefficients. A counterexample is provided. An alternative approach is presented for the calculation of sector-stability hypersolids in the coefficient space.