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math.NA2026
Optical Fourier Transform-Based Preconditioning for Large-Scale Inverse Problems
Chelsea Drum, Lucas Onisk, Ariana N. Brown +1
Fast Fourier Transform (FFT)-based preconditioners provide an efficient approach for approximating inverse operators in large-scale linear inverse problems when the underlying oper…
math.NA2025
Projected iterated Tikhonov regularization in low precision
Chelsea Drum, James. G. Nagy, Lucas Onisk
We investigate the regularizing behavior of an iterative Krylov subspace method for the solution of linear inverse problems in precisions lower than double. Recent works have consi…
math.NA2024
Mixed precision iterative refinement for linear inverse problems
James G. Nagy, Lucas Onisk
This study investigates the iterative refinement method applied to the solution of linear discrete inverse problems by considering its application to the Tikhonov problem in mixed…