# Fast Approximation of the H-infinity Norm via Optimization over Spectral Value Sets

The iterates of Algorithm SVSA0 superimposed on a plot of spectral value sets converging to a locally rightmost point, see the paper for details.

A MATLAB package for approximating the spectral set abscissa and radius and H-infinity norm of a transfer matrix.

**Reference :** N. Guglielmi, M. Gurbuzbalaban, M.L. Overton, *Fast Approximation of the H-infinity Norm via Optimization over Spectral Value Sets*, Siam Journal on Matrix Analysis and Applications, 2013.

The main routines are **svsar.m** and **hinfnorm.m**.

## Code