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Artikel
Element-by-Element Schur Complement Approximations for General Nonsymmetric Matrices of Two-by-Two Block Form
| Författare: |
Neytcheva, M., He, X., Do-Quang, M. |
| Dokumenttyp: |
Artikel |
| Tillstånd: |
Publicerad |
| Tidskrift: |
Lecture Notes in Computer Science |
| Volym: |
5910
108 |
| År: |
2010 |
AbstractWe consider element-by-element Schur complement approximations for indefinite and general nonsymmetric matrices of two-by-two block form, as arising in finite element discretized systems of PDEs. The paper provides some analysis of the so-obtained approximation and attempts to quantify the quality of the underlying two-by-two matrix splitting in a way similar to that used for symmetric positive definite matrices. The quality of the approximation is illustrated numerically.
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