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A Hardy inequality in a twisted Dirichlet-Neumann waveguide

Hynek Kovarik, David Krejcirik

math-pharXiv:math-ph/0603076

Abstract

We consider the Laplacian in a straight strip, subject to a combination of Dirichlet and Neumann boundary conditions. We show that a switch of the respective boundary conditions leads to a Hardy inequality for the Laplacian. As a byproduct of our method, we obtain a simple proof of a theorem of Dittrich and Kriz.

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