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Software
HAPACK Software for (Skew-)Hamiltonian Eigenvalue Problems
HAPACK provides Fortran 77 routines for eigenvalue problems related to Hamiltonian and skew-Hamiltonian matrices. ...more
MESS (Matrix Equation Sparse Solver)
MESS is the successor to the LyaPack Toolbox for MATLAB. It is intended for solving large sparse matrix equations. The new version has been rewriten in large parts to fit the drastic upgrades in the Matlab releases since 2000. Additionally new solvers for differential Riccati equations extend the functionality and many enhancements upgrade the efficiency and runtime behaviour enlarging the number of unknowns that can now be computed....more
PLiCMR: A Parallel Library for Model Reduction
PLiCMR is a library of routines for parallel model reduction of large-scale discrete or continuous linear time invariant systems represented using the state-space model. Three methods are available in PLiCMR: Balance & Truncate, Singular Perturbation Approximation, and Hankel-Norm Approximation. Future extensions will include Balanced Stochastic Truncation....more
RRQR-MEX a MATLAB Mex-Interface for the rank revealing QR factorization
RRQR-MEX provides a MATLAB-MexInterface function to the FORTRAN RRQR implementation by G.Quintana-Orti and C.H. Bischof ...more
The Control and Systems Library SLICOT
The subroutine library SLICOT provides Fortran 77 implementations of numerical algorithms for computations in systems and control theory....more
Wachspress ADI-Shifts
An implementation of the elliptic integral based (sub)optimal alternating directions implicit (ADI) shift parameters following the theory by Wachspress et.al. ...more
MATLAB Codes for Computing the H∞-/L∞-Norm for Large-Scale Descriptor Systems
MATLAB implemenation of various algorithms for the computation of the H∞-/L∞-norm for large-scale descriptor systems. Based on the computation of dominant poles, an optimization over structured pseudospectra or level sets, induced by the imaginary eigenvalues of even matrix pencils, is performed. ... more