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Publications by N. Umetani
A Multigrid-Based Shifted Laplacian Preconditioner for a Fourth-Order Helmholtz Discretization
Numerical Linear Algebra with Applications
Applied Mathematics
Number Theory
Algebra
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An Algebraic Multigrid Based Shifted-Laplacian Preconditioner for the Helmholtz Equation
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AILU for Helmholtz Problems: A New Preconditioner Based on an Analytic Factorization
Comptes Rendus de l'Académie des Sciences - Series I - Mathematics
Ailu for Helmholtz Problems: A New Preconditioner Based on the Analytic Parabolic Factorization
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Multigrid Method Based on Transformation-Free High-Order Scheme for Solving 2D Helmholtz Equation on Nonuniform Grids
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Fourth-Order Energy-Preserving Locally Implicit Time Discretization for Linear Wave Equations
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A Multigrid Method Enhanced by Krylov Subspace Iteration for Discrete Helmholtz Equations
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