English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present a scalability study of Golub-Kahan bidiagonalization for theparallel iterative solution of symmetric indefinite linear systems with a 2x2block structure. The algorithms have been implemented within the parallelnumerical library PETSc. Since a nested inner-outer iteration strategy may benecessary, we investigate different choices for the inner solvers, includingparallel sparse direct and multigrid accelerated iterative methods. We show thestrong and weak scalability of the Golub-Kahan bidiagonalization basediterative method when applied to a two-dimensional Poiseuille flow and to two-and three-dimensional Stokes test problems.

Parallel solution of saddle point systems with nested iterative solvers based on the Golub-Kahan Bidiagonalization