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| Content Provider | Springer Nature Link |
|---|---|
| Author | Demlow, Alan |
| Copyright Year | 2015 |
| Abstract | A rich theory demonstrating convergence and optimality of adaptive finite element methods (AFEM) has been developed in recent years. In this work we prove optimality of AFEM which are designed to control local energy errors in elliptic partial differential equations. Because errors propagate globally in FEM, controlling local errors requires controlling both local energy solution properties and global error contributions (pollution errors) which may be measured in a weaker norm such as the $$L_2$$ norm. We define adaptive methods which control both of these error components and prove that they converge with the best possible rate over all possible refinements of the initial mesh. These results are valid for Poisson’s problem on convex polyhedral domains in arbitrary space dimension. Our theory establishes AFEM optimality for several adaptive marking strategies which rigorously control pollution effects. We also present numerical examples that illustrate our theory and confirm that local energy AFEM without pollution control can fail to yield optimal meshes. |
| Ending Page | 60 |
| Page Count | 34 |
| Starting Page | 27 |
| File Format | |
| ISSN | 0029599X |
| e-ISSN | 09453245 |
| Journal | Numerische Mathematik |
| Issue Number | 1 |
| Volume Number | 134 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2015-10-31 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | ApplicationMathematics/Computational Methods of Engineering Mathematical Methods in Physics Numerical Analysis Theoretical, Mathematical and Computational Physics Numerical and Computational Physics Mathematics Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods |
| Content Type | Text |
| Resource Type | Article |
| Subject | Applied Mathematics Computational Mathematics |
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