Deflation of Eigenvalues for Iterative Methods in Lattice QCD
arXiv:hep-lat/0309068 · doi:10.1016/S0920-5632(03)02734-8
Abstract
Work on generalizing the deflated, restarted GMRES algorithm, useful in lattice studies using stochastic noise methods, is reported. We first show how the multi-mass extension of deflated GMRES can be implemented. We then give a deflated GMRES method that can be used on multiple right-hand sides of in an efficient manner. We also discuss and give numerical results on the possibilty of combining deflated GMRES for the first right hand side with a deflated BiCGStab algorithm for the subsequent right hand sides.
Lattice2003(machine)