Stefania Bellavia

Publication Activity (10 Years)

Years Active: 1998-2024
Publications (10 Years): 24

Top Topics

Nonlinear Systems

Levenberg Marquardt

Top Venues

Comput. Optim. Appl.

J. Optim. Theory Appl.

Publications

Fabrizio Argenti, Stefania Bellavia, Marco Fontani, Gabriele Guarnieri, Martino Jerian, Alberto Limone, Simone Rebegoldi
A Proposed Workflow for the Restoration of Image Artifacts in Forensic Applications. IEEE Access 12 (2024)
Stefania Bellavia, Natasa Krejic, Benedetta Morini, Simone Rebegoldi
A stochastic first-order trust-region method with inexact restoration for finite-sum minimization. Comput. Optim. Appl. 84 (1) (2023)
Stefania Bellavia, Davide Palitta, Margherita Porcelli, Valeria Simoncini
Regularized methods via cubic subspace minimization for nonconvex optimization. CoRR (2023)
Stefania Bellavia, Francesco Della Santa, Alessandra Papini
Alternate Training of Shared and Task-Specific Parameters for Multi-Task Neural Networks. CoRR (2023)
Stefania Bellavia, Greta Malaspina, Benedetta Morini
Inexact Newton methods with matrix approximation by sampling for nonlinear least-squares and systems. CoRR (2023)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
The Impact of Noise on Evaluation Complexity: The Deterministic Trust-Region Case. J. Optim. Theory Appl. 196 (2) (2023)
Stefania Bellavia, Benedetta Morini, Simone Rebegoldi
On the Convergence Properties of a Stochastic Trust-Region Method with Inexact Restoration. Axioms 12 (1) (2023)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
Trust-region algorithms: Probabilistic complexity and intrinsic noise with applications to subsampling techniques. EURO J. Comput. Optim. 10 (2022)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
Adaptive regularization for nonconvex optimization using inexact function values and randomly perturbed derivatives. J. Complex. 68 (2022)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
Quadratic and Cubic Regularisation Methods with Inexact function and Random Derivatives for Finite-Sum Minimisation. CoRR (2021)
Stefania Bellavia, Natasa Krejic, Benedetta Morini, Simone Rebegoldi
A stochastic first-order trust-region method with inexact restoration for finite-sum minimization. CoRR (2021)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
The Impact of Noise on Evaluation Complexity: The Deterministic Trust-Region Case. CoRR (2021)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
Quadratic and Cubic Regularisation Methods with Inexact function and Random Derivatives for Finite-Sum Minimisation. ICCSA (Workshops) (2021)
Stefania Bellavia, Jacek Gondzio, Margherita Porcelli
A Relaxed Interior Point Method for Low-Rank Semidefinite Programming Problems with Applications to Matrix Completion. J. Sci. Comput. 89 (2) (2021)
Stefania Bellavia, Gianmarco Gurioli
Complexity Analysis of a Stochastic Cubic Regularisation Method under Inexact Gradient Evaluations and Dynamic Hessian Accuracy. CoRR (2020)
Stefania Bellavia, Natasa Krejic, Benedetta Morini
Inexact restoration with subsampled trust-region methods for finite-sum minimization. Comput. Optim. Appl. 76 (3) (2020)
Stefania Bellavia, Jacek Gondzio, Margherita Porcelli
An inexact dual logarithmic barrier method for solving sparse semidefinite programs. Math. Program. 178 (1-2) (2019)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
Adaptive Regularization Algorithms with Inexact Evaluations for Nonconvex Optimization. SIAM J. Optim. 29 (4) (2019)
Stefania Bellavia, Jacek Gondzio, Margherita Porcelli
A relaxed interior point method for low-rank semidefinite programming problems. CoRR (2019)
Stefania Bellavia, Gianmarco Gurioli, Benedetta Morini, Philippe L. Toint
Deterministic and stochastic inexact regularization algorithms for nonconvex optimization with optimal complexity. CoRR (2018)
Stefania Bellavia, Elisa Riccietti
On an Elliptical Trust-Region Procedure for Ill-Posed Nonlinear Least-Squares Problems. J. Optim. Theory Appl. 178 (3) (2018)
Stefania Bellavia, Serge Gratton, Elisa Riccietti
A Levenberg-Marquardt method for large nonlinear least-squares problems with dynamic accuracy in functions and gradients. Numerische Mathematik 140 (3) (2018)
Stefania Bellavia, Valentina De Simone, Daniela di Serafino, Benedetta Morini
On the update of constraint preconditioners for regularized KKT systems. Comput. Optim. Appl. 65 (2) (2016)
Stefania Bellavia, Benedetta Morini, Elisa Riccietti
On an adaptive regularization for ill-posed nonlinear systems and its trust-region implementation. Comput. Optim. Appl. 64 (1) (2016)
Stefania Bellavia, Sandra Pieraccini
On affine-scaling inexact dogleg methods for bound-constrained nonlinear systems. Optim. Methods Softw. 30 (2) (2015)
Stefania Bellavia, Valentina De Simone, Daniela di Serafino, Benedetta Morini
Updating Constraint Preconditioners for KKT Systems in Quadratic Programming Via Low-Rank Corrections. SIAM J. Optim. 25 (3) (2015)
Stefania Bellavia, Benedetta Morini, Margherita Porcelli
New updates of incomplete LU factorizations and applications to large nonlinear systems. Optim. Methods Softw. 29 (2) (2014)
Stefania Bellavia, Jacek Gondzio, Benedetta Morini
A Matrix-Free Preconditioner for Sparse Symmetric Positive Definite Systems and Least-Squares Problems. SIAM J. Sci. Comput. 35 (1) (2013)
Stefania Bellavia, Maria Macconi, Sandra Pieraccini
Constrained Dogleg methods for nonlinear systems with simple bounds. Comput. Optim. Appl. 53 (3) (2012)
Stefania Bellavia, Valentina De Simone, Daniela di Serafino, Benedetta Morini
A Preconditioning Framework for Sequences of Diagonally Modified Linear Systems Arising in Optimization. SIAM J. Numer. Anal. 50 (6) (2012)
Stefania Bellavia, Jacek Gondzio, Benedetta Morini
Computational experience with numerical methods for nonnegative least-squares problems. Numer. Linear Algebra Appl. 18 (3) (2011)
Stefania Bellavia, Silvia Magheri, Claudia Miani
Inexact Newton methods for model simulation. Int. J. Comput. Math. 88 (14) (2011)
Stefania Bellavia, Valentina De Simone, Daniela di Serafino, Benedetta Morini
Efficient Preconditioner Updates for Shifted Linear Systems. SIAM J. Sci. Comput. 33 (4) (2011)
Stefania Bellavia, Daniele Bertaccini, Benedetta Morini
Nonsymmetric Preconditioner Updates in Newton-Krylov Methods for Nonlinear Systems. SIAM J. Sci. Comput. 33 (5) (2011)
Stefania Bellavia, Coralia Cartis, Nicholas I. M. Gould, Benedetta Morini, Philippe L. Toint
Convergence of a Regularized Euclidean Residual Algorithm for Nonlinear Least-Squares. SIAM J. Numer. Anal. 48 (1) (2010)
Stefania Bellavia, Sandra Pieraccini
Numerical solution of KKT systems in PDE-constrained optimization problems via the affine scaling trust-region approach. Int. J. Comput. Math. 86 (12) (2009)
Stefania Bellavia, Jacek Gondzio, Benedetta Morini
Regularization and preconditioning of KKT systems arising in nonnegative least-squares problems. Numer. Linear Algebra Appl. 16 (1) (2009)
Stefania Bellavia, Stefano Berrone
Globalization strategies for Newton-Krylov methods for stabilized FEM discretization of Navier-Stokes equations. J. Comput. Phys. 226 (2) (2007)
Stefania Bellavia, Benedetta Morini
Subspace Trust-Region Methods for Large Bound-Constrained Nonlinear Equations. SIAM J. Numer. Anal. 44 (4) (2006)
Stefania Bellavia, Maria Macconi, Benedetta Morini
An interior point Newton-like method for non-negative least-squares problems with degenerate solution. Numer. Linear Algebra Appl. 13 (10) (2006)
Stefania Bellavia, Stefano Lodi, Benedetta Morini
Inferences on Kernel Density Estimates by Solving Nonlinear Systems. SSDBM (2006)
Stefania Bellavia, Benedetta Morini
An interior global method for nonlinear systems with simple bounds. Optim. Methods Softw. 20 (4-5) (2005)
Stefania Bellavia, Sandra Pieraccini
Convergence Analysis of an Inexact Infeasible Interior Point Method for Semidefinite Programming. Comput. Optim. Appl. 29 (3) (2004)
Stefania Bellavia, Maria Macconi, Benedetta Morini
STRSCNE: A Scaled Trust-Region Solver for Constrained Nonlinear Equations. Comput. Optim. Appl. 28 (1) (2004)
Stefania Bellavia, Benedetta Morini
A Globally Convergent Newton-GMRES Subspace Method for Systems of Nonlinear Equations. SIAM J. Sci. Comput. 23 (3) (2001)
Stefania Bellavia, Maria Macconi, Benedetta Morini
A Hybrid Newton-GMRES Method for Solving Nonlinear Equations. NAA (2000)
Stefania Bellavia, Maria Macconi, Benedetta Morini
The Switching-Method in Multiple Shooting. Computing 60 (3) (1998)