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A Semi Matrix-Free Twogrid Preconditioner for the Helmholtz Equation with Near Optimal Shifts.
Daniel Drzisga
Tobias Köppl
Barbara I. Wohlmuth
Published in:
J. Sci. Comput. (2023)
Keyphrases
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matrix inversion
edge preserving
numerical methods
linear algebra
matrix representation
case study
low rank
numerical solution
positive definite
iterative methods
nonlinear equations
boltzmann distribution
real time
face recognition
singular value decomposition