Two-level additive Schwarz preconditioners for \(P1\) nonconforming finite elements for nonsymmetric and indefinite problems (Q1126617)
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scientific article; zbMATH DE number 1183178
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Two-level additive Schwarz preconditioners for \(P1\) nonconforming finite elements for nonsymmetric and indefinite problems |
scientific article; zbMATH DE number 1183178 |
Statements
Two-level additive Schwarz preconditioners for \(P1\) nonconforming finite elements for nonsymmetric and indefinite problems (English)
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4 March 1999
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Two-level additive Schwarz preconditioners for nonsymmetric, indefinite elliptic boundary value problems discretized by means of \(P1\) nonconforming finite elements are developed. The preconditioners are applied within the GMRES method. It is shown that the convergence rate is independent of the number of degrees of freedom and the number of local problems if the coarse mesh is fine enough.
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additive Schwarz method
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preconditioners
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nonsymmetric, indefinite elliptic boundary value problems
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finite elements
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GMRES method
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convergence
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0.93677413
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0.93289703
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0.9298854
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0.9295685
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0.91792476
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0.9177364
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