GLT-based preconditioners are built for multilevel Toeplitz systems from finite-difference discretization of the quasi-boundary regularized inverse source problem, producing eigenvalue clustering around one and faster GMRES convergence.
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Non-Hermitian block Toeplitz matrix sequences possess a spectral distribution given by the geometric mean of the block symbols under GLT theory.
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Efficient Krylov solvers for inverse source problem in 2D space-time fractional diffusion equation
GLT-based preconditioners are built for multilevel Toeplitz systems from finite-difference discretization of the quasi-boundary regularized inverse source problem, producing eigenvalue clustering around one and faster GMRES convergence.
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A note on the spectral distribution of non-Hermitian block matrices with Toeplitz blocks
Non-Hermitian block Toeplitz matrix sequences possess a spectral distribution given by the geometric mean of the block symbols under GLT theory.