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math.OC2022
Multilevel fista for image restoration
Guillaume Lauga, Elisa Riccietti, Nelly Pustelnik +1
This paper presents a multilevel FISTA algorithm, based on the use of the Moreau envelope to build the correction brought by the coarse models, which is easy to compute when the ex…
math.OC2020
An inexact non stationary Tikhonov procedure for large-scale nonlinear ill-posed problems
Stefania Bellavia, Marco Donatelli, Elisa Riccietti
In this work we consider the stable numerical solution of large-scale ill-posed nonlinear least squares problems with nonzero residual. We propose a non-stationary Tikhonov method…
math.OC2019
Worst-case Complexity Bounds of Directional Direct-search Methods for Multiobjective Optimization
A. L. Custódio, Y. Diouane, R. Garmanjani +1
Direct Multisearch is a well-established class of algorithms, suited for multiobjective derivative-free optimization. In this work, we analyze the worst-case complexity of this cla…