Author
Mike Botchev
results may include different authors with the same name
2 papers
Practical shift choice in the shift-and-invert Krylov subspace evaluations of the matrix exponential
We propose two methods to find a proper shift parameter in the shift-and-invert method for computing matrix exponential matrix-vector products. These methods are useful in the case of matrix exponential action has to be computed for a…
The conjugate gradient method (CG) is typically used with a preconditioner which improves efficiency and robustness of the method. Many preconditioners include parameters and a proper choice of a preconditioner and its parameters is often…