.Modelica_LinearSystems2.Math.Matrices.Internal.eigenvaluesHessenberg

Information

This function uses DHSEQR Lapack-routine to calculate the eigenvalues of an upper Hessenberg form H. Therefore, H is reduced to Schur form T. The eigenvalues are obtained from the diagonal of T.

See Modelica_LinearSystems2.Math.Matrices.LAPACK.dhseqr for details

Interface

function eigenvaluesHessenberg
  extends Modelica.Icons.Function;
  input Real H[:, size(H, 1)];
  output Real alphaReal[size(H, 1)] "Real part of alpha (eigenvalue=(alphaReal+i*alphaImag))";
  output Real alphaImag[size(H, 1)] "Imaginary part of alpha (eigenvalue=(alphaReal+i*alphaImag))";
  output Integer info = 0;
end eigenvaluesHessenberg;

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