A Summary on the Real Stability Radius and Real Perturbation Values
Bo Bernhardsson, Anders Rantzer, Li Qiu · Birkhäuser Basel eBooks · 1996
The stability radius problem has an interesting history in the mathematical and control theory literature. Stability radii also occur in numerical analysis in relation with the so called pseudospectra introduced by Trefethen and the analysis of stability of numerical solvers for ordinary differential equations.