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| Main Author: | |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.18520 |
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| _version_ | 1866918305723318272 |
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| author | Greif, Chen |
| author_facet | Greif, Chen |
| contents | We consider block preconditioners for double saddle-point systems, and investigate the effect of approximating the nested Schur complement associated with the trailing diagonal block on the eigenvalue distribution of the preconditioned matrix. We develop a variant of Elman's BFBt method and adapt it to this family of linear systems. Our findings are illustrated on a Marker-and-Cell discretization of the Stokes-Darcy equations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_18520 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A BFBt preconditioner for Double Saddle-Point Systems Greif, Chen Numerical Analysis We consider block preconditioners for double saddle-point systems, and investigate the effect of approximating the nested Schur complement associated with the trailing diagonal block on the eigenvalue distribution of the preconditioned matrix. We develop a variant of Elman's BFBt method and adapt it to this family of linear systems. Our findings are illustrated on a Marker-and-Cell discretization of the Stokes-Darcy equations. |
| title | A BFBt preconditioner for Double Saddle-Point Systems |
| topic | Numerical Analysis |
| url | https://arxiv.org/abs/2601.18520 |