1 citations · 1 across the 4 of their papers we have counts for
4 papers
Performance-Portable Optimization and Analysis of Multiple Right-Hand Sides in a Lattice QCD Solver
Shiting Long, Gustavo Ramirez-Hidalgo, Stepan Nassyr +3
Managing the high computational cost of iterative solvers for sparse linear systems is a known challenge in scientific computing. Moreover, scientific applications often face memor…
Using orthogonal projectors in multigrid multilevel Monte Carlo for trace estimation in lattice QCD
Andreas Frommer, Jose Jimenez-Merchan, Francesco Knechtli +2
We introduce a multigrid multilevel Monte Carlo method for stochastic trace estimation in lattice QCD based on orthogonal projections. This formulation extends the previously propo…
Deflated Multigrid Multilevel Monte Carlo
Andreas Frommer, Gustavo Ramirez-Hidalgo
In lattice QCD, the trace of the inverse of the discretized Dirac operator appears in the disconnected fermion loop contribution to an observable. As simulation methods get more an…
A Multilevel Approach to Variance Reduction in the Stochastic Estimation of the Trace of a Matrix
Andreas Frommer, Mostafa Nasr Khalil, Gustavo Ramirez-Hidalgo
The trace of a matrix function f(A), most notably of the matrix inverse, can be estimated stochastically using samples< x,f(A)x> if the components of the random vectors x obey an a…