QARPACK is short for Quadratic Arnoldi Package. It is a Matlab Toolbox for solution of large sparse quadratic and more general nonlinear eigenvalue problems.

Version v.2.1:

What's new:

Version v.2.0:

What's new:

Version v.1.9:

What's new:

  • Solver for general nonlinear eigenvalue problems satisfying variational principle or with dominating real or imaginary part.

  • We renamed the quadratic solver in version v.1.0 from nra to qra, nra is now the general nonlinear solver.

  • QARPACK tarball

  • QARPACK User's Guide

Version v.1.0:

If you have queries about the code or if you have problems using the package drop me an email.