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arXiv · 2211.01974

Discrete approximations to Dirichlet and Neumann Laplacians on a half-space and norm resolvent convergence

Horia Cornean·Henrik Garde·Arne Jensen
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Abstract

We extend recent results on discrete approximations of the Laplacian in $\mathbf{R}^d$ with norm resolvent convergence to the corresponding results for Dirichlet and Neumann Laplacians on a half-space. The resolvents of the discrete Dirichlet/Neumann Laplacians are embedded into the continuum using natural discretization and embedding operators. Norm resolvent convergence to their continuous counterparts is proven with a quadratic rate in the mesh size. These results generalize with a limited rate to also include operators with a real, bounded, and H\"older continuous potential, as well as certain functions of the Dirichlet/Neumann Laplacians, including any positive real power. Note (Nov 27, 2024): A corrigendum has been added to the end of the PDF.

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Horia Cornean, Henrik Garde, Arne Jensen. 2022-11-03. Discrete approximations to Dirichlet and Neumann Laplacians on a half-space and norm resolvent convergence. https://doi.org/10.4064/sm221103-16-3

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