The two-grid algorithm confronts a shifted unitary orthogonal method
High Energy Physics - Lattice
2009-11-10 v1
Abstract
In this paper I describe a new optimal Krylov subspace solver for shifted unitary matrices called the Shifted Unitary Orthogonal Method (SUOM). This algorithm is used as a benchmark against any improvement like the two-grid algorithm. I use the latter to show that the overlap operator can be inverted by successive inversions of the truncated overlap operator. This strategy results in large gains compared to SUOM.
Keywords
Cite
@article{arxiv.hep-lat/0409078,
title = {The two-grid algorithm confronts a shifted unitary orthogonal method},
author = {Artan Borici},
journal= {arXiv preprint arXiv:hep-lat/0409078},
year = {2009}
}
Comments
Contribution to Lattice 2004 (algorithms)