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Applying GMRES to the Helmholtz equation with shifted Laplacian preconditioning: what is the largest shift for which wavenumber-independent convergence is guaranteed?

Martin J. GanderIvan G. GrahamEuan A. Spence
Published in: Numerische Mathematik (2015)
Keyphrases
  • edge preserving
  • convergence speed
  • neural network
  • radon transform
  • conjugate gradient
  • convergence rate
  • faster convergence
  • optical flow computation
  • conjugate gradient algorithm