Results 81 to 90 of about 733 (176)

The performances of R GPU implementations of the GMRES method [PDF]

open access: yesRevista Română de Statistică, 2018
Although the performance of commodity computers has improved drastically with the introduction of multicore processors and GPU computing, the standard R distribution is still based on single-threaded model of computation, using only a small fraction of ...
Bogdan Oancea, Richard Pospisil
doaj  

Extending Elman's bound for GMRES

open access: yesLinear Algebra and its Applications
If the numerical range of a matrix is contained in the right half of the complex plane, the GMRES algorithm for solving linear systems will reduce the norm of the residual at every iteration. In his Ph.D. dissertation, Howard Elman derived a bound that guarantees convergence. When the numerical range contains the origin, GMRES need not make progress at
openaire   +2 more sources

GMRES with Randomized Sketching and Deflated Restarting

open access: yesSIAM Journal on Matrix Analysis and Applications
24 Pages; 6 Figures; 4 ...
Liam Burke 0002   +2 more
openaire   +3 more sources

Convergence analysis for nonlinear GMRES

open access: yesIMA Journal of Numerical Analysis
Abstract In this work we revisit nonlinear generalized minimal residual method (NGMRES) applied to nonlinear problems. NGMRES is used to accelerate the convergence of fixed-point iterations, which can substantially improve the performance of the underlying fixed-point iterations.
openaire   +2 more sources

On the numerical stability of sketched GMRES

open access: yesCoRR
23 pages, 6 ...
Liam Burke 0003, Erin Carson, Yuxin Ma
openaire   +2 more sources

An augmented IIM-level set method for Stokes equations with discontinuous viscosity

open access: yesElectronic Journal of Differential Equations, 2007
A finite difference method is proposed for incompressible Stokes equations with discontinuous viscosity. The method combines the augmented immersed interface method with a level set representation of the interface on a uniform Cartesian grid.
Zhilin Li, Sharon R. Lubkin, Xiaohai Wan
doaj  

MARIE 2.0: A Perturbation Matrix Based Patient-Specific MRI Field Simulator. [PDF]

open access: yesIEEE Trans Biomed Eng, 2023
Guryev GD   +6 more
europepmc   +1 more source

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