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Numerical Homogenization of Fractal Interface Problems

We consider the numerical homogenization of a class of fractal elliptic interface problems inspired by related mechanical contact problems from the geosciences. A particular feature is that the solution space depends on the actual fractal geometry. Our main results concern the construction of projection operators with suitable stability and approximation properties. The existence of such projections then allows for the application of existing concepts from localized orthogonal decomposition (LOD) and successive subspace correction to construct first multiscale discretizations and iterative algebraic solvers with scale-independent convergence behavior for this class of problems.

preprint2020arXivOpen access
Ralf KornhuberJoscha PodlesnyHarry Yserentant
math.APmath.NANumerical Analysis
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Ralf KornhuberJoscha PodlesnyHarry Yserentant

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