Methods of Solution
Direct methods for solving the standard or generalized eigenvalue problems and are based on transforming the problem to Schur or Generalized Schur form. However, there is no analogous form for quadratic matrix polynomials. One approach is to transform the quadratic matrix polynomial to a linear matrix pencil, and solve a generalized eigenvalue problem. Once eigenvalues and eigenvectors of the linear problem have been determined, eigenvectors and eigenvalues of the quadratic can be determined.
The most common linearization is the first companion linearization
where is the -by- identity matrix, with corresponding eigenvector
We solve for and, for example by computing the Generalized Schur form. We can then take the first components of as the eigenvector of the original quadratic .
Read more about this topic: Quadratic Eigenvalue Problem
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