Abstract
The classical Hardy inequality for the Laplacian Δ on \({\mathbb{R}^n}\) shows the borderline-behavior of a potential V for the following question: whether the Schrödinger operator −Δ + V has a finite or infinite number of the discrete spectrum. In this paper, we will give a sharp generalization of this inequality on \({\mathbb{R}^n}\) to a relative version of that on large classes of complete noncompact manifolds. Replacing \({\mathbb{R}^n}\) by some specific classes of complete noncompact manifolds, including hyperbolic spaces, we also establish some sharp criteria for the above-type question.
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Communicated by Y. Giga.
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Akutagawa, K., Kumura, H. Geometric relative Hardy inequalities and the discrete spectrum of Schrödinger operators on manifolds. Calc. Var. 48, 67–88 (2013). https://doi.org/10.1007/s00526-012-0542-z
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DOI: https://doi.org/10.1007/s00526-012-0542-z