On Nonsingular Saddle-Point Systems with a Maximally Rank Deficient Leading Block. - Ron Estrin; Chen Greif (SIAM J. Matrix Anal. Appl., 2015)

Towards an optimal condition number of certain augmented Lagrangian-type saddle-point matrices. - Ron Estrin; Chen Greif (Numer. Linear Algebra Appl., 2016)

SPMR: A Family of Saddle-Point Minimum Residual Solvers. - Ron Estrin; Chen Greif (SIAM J. Sci. Comput., 2018)

Euclidean-Norm Error Bounds for SYMMLQ and CG. - Ron Estrin; Dominique Orban; Michael A. Saunders (SIAM J. Matrix Anal. Appl., 2019)

LSLQ: An Iterative Method for Linear Least-Squares with an Error Minimization Property. - Ron Estrin; Dominique Orban; Michael A. Saunders (SIAM J. Matrix Anal. Appl., 2019)

LNLQ: An Iterative Method for Least-Norm Problems with an Error Minimization Property. - Ron Estrin; Dominique Orban; Michael A. Saunders (SIAM J. Matrix Anal. Appl., 2019)

A perturbation view of level-set methods for convex optimization. - Ron Estrin; Michael P. Friedlander (Optim. Lett., 2020)

Implementing a Smooth Exact Penalty Function for Equality-Constrained Nonlinear Optimization. - Ron Estrin; Michael P. Friedlander; Dominique Orban; Michael A. Saunders (SIAM J. Sci. Comput., 2020)

Implementing a Smooth Exact Penalty Function for General Constrained Nonlinear Optimization. - Ron Estrin; Michael P. Friedlander; Dominique Orban; Michael A. Saunders (SIAM J. Sci. Comput., 2020)