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arXiv math/0305278math.SPmath-phmath.APmath.MP
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谱的离散性与薛定谔算子的正性准则

Discreteness of spectrum and positivity criteria for Schrödinger operators

Vladimir Maz'ya, Mikhail Shubin

摘要:

本文给出了具有下半有界标量势的Schr dinger算子谱离散的一类充要条件。由A.M.Molchanov(1953)提出的经典谱离散性准则使用了立方体中可忽略集的概念,即维纳容量小于一个小常数乘以立方体容量的集合。我们证明了这个常数可以在0和1之间任意取。这解决了I.M.Gelfand在1953年提出的一个问题。此外,我们通过允许常数依赖于立方体的大小来扩展可忽略性的概念。我们给出了一个完整的描述,所有这种可忽略的条件。我们的条件涉及不同的可忽略类的先验等价性是一个非平凡的能力。我们还建立了类似的严格的正性准则的薛定谔算子的非负势。

英文摘要:

We provide a class of necessary and sufficient conditions for the discreteness of spectrum of Schrödinger operators with scalar potentials which are semibounded below. The classical discreteness of spectrum criterion by A.M.Molchanov (1953) uses a notion of negligible set in a cube as a set whose Wiener's capacity is less than a small constant times the capacity of the cube. We prove that this constant can be taken arbitrarily between 0 and 1. This solves a problem formulated by I.M.Gelfand in 1953. Moreover, we extend the notion of negligibility by allowing the constant to depend on the size of the cube. We give a complete description of all negligibility conditions of this kind. The a priori equivalence of our conditions involving different negligibility classes is a non-trivial property of the capacity. We also establish similar strict positivity criteria for the Schrödinger operators with non-negative potentials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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