Roots of Matrices in the Study of GMRES Convergence and Crouzeix's Conjecture. - Daeshik Choi; Anne Greenbaum (SIAM J. Matrix Anal. Appl., 2015)

An Algorithm for Finding a 2-Similarity Transformation from a Numerical Contraction to a Contraction. - Daeshik Choi; Anne Greenbaum (SIAM J. Matrix Anal. Appl., 2015)