67 citations · 193 across the 23 of their papers we have counts for
25 papers
Polynomial Preconditioning for Indefinite Matrices
Hayden Henson, Ronald B. Morgan
Polynomial preconditioning is an important tool in solving large linear systems and eigenvalue problems. A polynomial from GMRES can be used to precondition restarted GMRES and res…
Multipolynomial Monte Carlo Trace Estimation
Paul Lashomb, Ronald B. Morgan, Travis Whyte +1
In lattice QCD the calculation of disconnected quark loops from the trace of the inverse quark matrix has large noise variance. A multilevel Monte Carlo method is proposed for this…
Multi-Polynomial Monte Carlo for Trace Estimation in Lattice QCD
Paul Lashomb, Ronald B. Morgan, Travis Whyte +1
Estimating the trace of the inverse of a large matrix is an important problem in lattice quantum chromodynamics. A multilevel Monte Carlo method is proposed for this problem that u…
High-degree Polynomial Noise Subtraction
Paul Lashomb, Ronald B. Morgan, Travis Whyte +1
In lattice QCD, the calculation of physical quantities from disconnected quark loop calculations have large variance due to the use of Monte Carlo methods for the estimation of the…
Two-Grid Deflated Krylov Methods for Linear Equations
Ronald B. Morgan, Travis Whyte, Walter Wilcox +1
An approach is given for solving large linear systems that combines Krylov methods with use of two different grid levels. Eigenvectors are computed on the coarse grid and used to d…
Disconnected Loop Subtraction Methods in Lattice QCD
Travis Whyte, Suman Baral, Paul Lashomb +2
Noise subtraction methods are a set of techniques that aim to reduce the variance of signals in LQCD which are often flooded with noise. The standard approach is a pertubative subt…