MatExPre is a matrix-exponential-based preconditioner that solves high-frequency Helmholtz equations with linear growth in matrix-vector products as frequency increases.
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MatExPre: A matrix exponential preconditioner for the high-frequency Helmholtz equation
MatExPre is a matrix-exponential-based preconditioner that solves high-frequency Helmholtz equations with linear growth in matrix-vector products as frequency increases.