Tensor Product Type Subspace Splittings
نویسنده
چکیده
We describe tensor product type techniques to derive robust solvers for anisotropic elliptic model problems on rectangular domains in R d. Our analysis is based on the theory of additive subspace correction methods and applies to nite-element-and prewavelet-schemes. We present multilevel-and prewavelet-based methods that are robust for anisotropic diiusion operators with additional Helmholtz term. Furthermore the resulting convergence rates are independent of the discretization level. Beside their theoretical foundation, we also report on the results of various numerical experiments to compare the diierent methods.
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