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arxiv: 0911.0547 · v1 · pith:5Q3PL5R2new · submitted 2009-11-03 · 💻 cs.NA · cs.NA

On Element SDD Approximability

classification 💻 cs.NA cs.NA
keywords elementmatrixanalysisapproximabilityapproximatedapproximatingcannotcases
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This short communication shows that in some cases scalar elliptic finite element matrices cannot be approximated well by an SDD matrix. We also give a theoretical analysis of a simple heuristic method for approximating an element by an SDD matrix.

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