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· 1998 · DOI 10.1137/s1064827595294691

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math.NA 1

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2026 1

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Factored Sparse Approximate Inverse Preconditioning via Spectral Optimization

math.NA · 2026-06-22 · unverdicted · novelty 6.0

Spectral optimization of admissible entries in fixed-support FSAI preconditioners, using projected Krylov gradients and a detached Rayleigh surrogate, improves performance over Frobenius-based selection on finite-element problems, especially indefinite saddle-point systems.

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  • Factored Sparse Approximate Inverse Preconditioning via Spectral Optimization math.NA · 2026-06-22 · unverdicted · none · ref 69

    Spectral optimization of admissible entries in fixed-support FSAI preconditioners, using projected Krylov gradients and a detached Rayleigh surrogate, improves performance over Frobenius-based selection on finite-element problems, especially indefinite saddle-point systems.