Refining the Lower Bound on the Positive Eigenvalues of Saddle Point Matrices with Insights on the Interactions between the Blocks. - Daniel Ruiz 002; Annick Sartenaer; Charlotte Tannier (SIAM J. Matrix Anal. Appl., 2018)

Using partial spectral information for block diagonal preconditioning of saddle-point systems. - Alison Ramage; Daniel Ruiz 002; Annick Sartenaer; Charlotte Tannier (Comput. Optim. Appl., 2021)