Class Chebyshev

  • All Implemented Interfaces:
    IterativeSolver

    public class Chebyshev
    extends AbstractIterativeSolver
    Chebyshev solver. Solves the symmetric positive definite linear system Ax = b using the Preconditioned Chebyshev Method. Chebyshev requires an acurate estimate on the bounds of the spectrum of the matrix.
    • Constructor Detail

      • Chebyshev

        public Chebyshev​(Vector template,
                         double eigmin,
                         double eigmax)
        Constructor for Chebyshev. Uses the given vector as template for creating scratch vectors. Typically, the solution or the right hand side vector can be passed, and the template is not modified. Eigenvalue estimates must also be provided
        Parameters:
        template - Vector to use as template for the work vectors needed in the solution process
        eigmin - Smallest eigenvalue. Must be positive
        eigmax - Largest eigenvalue. Must be positive
    • Method Detail

      • setEigenvalues

        public void setEigenvalues​(double eigmin,
                                   double eigmax)
        Sets the eigenvalue estimates.
        Parameters:
        eigmin - Smallest eigenvalue. Must be positive
        eigmax - Largest eigenvalue. Must be positive