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This tag is used if a reference is needed in a paper or textbook on a specific result.

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Invertibility of the Laplacian

Consider the Laplacian as an operator $\Delta\colon W^{2,p}(\Omega)\subset L^p(\Omega)\to L^p(\Omega)$ subject to homogeneous Robin boundary conditions, where $\Omega\subset \mathbf R^n$ is either bou …
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