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math.NA2026
Advances on the recovery of (perturbed) Cauchy matrices
Paola Boito, Dario Fasino, Beatrice Meini
Given a (possibly approximate) Cauchy matrix, how can we efficiently compute its generators? Expanding on previous work by Liesen and Luce [Linear Algebra Appl. 493 (2016) 261--280…
math.NA2025
Quasiseparable LU decay bounds for inverses of banded matrices
Paola Boito, Yuli Eidelman
We develop new, easily computable exponential decay bounds for inverses of banded matrices, based on the quasiseparable representation of Green matrices. The bounds rely on a diago…