REFERENCES

stability and robustness analysis problems to nondifferentiable convex programs. They have also provided efficient numerical methods to solve the resulting convex programs. In particular, the results in [2] can unambiguously determine whether an uncertain system with scalar uncertain diagonal blocks is QS(A,). Some of these ideas can also be extended to synthesis problems. See, for example, Bemussou et al. [ l] and Packard and Becker [9] for the solution of a state-feedback quadratic stabiliz-ability problem, in the presence of real uncertain parameters, via convex programming