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arXiv 2408.02149math.APmath-phmath.FAmath.MPmath.SP
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关于图上正薛定谔算子的Landis猜想

On Landis' conjecture for positive Schrödinger operators on graphs

Ujjal Das, Matthias Keller, Yehuda Pinchover

AI总结:

本文证明了图上正薛定谔算子的Landis型衰减准则,在特定方向快衰减下保证调和函数平凡,并给出整数格、正则树及分数阶情形的显式结果。

摘要:

在本文中,我们研究图上正薛定谔算子的Landis猜想。更确切地说,我们证明了一个Landis型结果,其形式为衰减准则,该准则确保当正薛定谔算子$\mathcal{H}$(其势函数上界为$1$)的$\mathcal{H}$-调和函数为平凡函数时成立。算子的正性假设允许我们在整个图上施加慢衰减,而仅在一个方向上要求快衰减,而非在整个图上要求快衰减。随后,我们特别考察了$\mathbb{Z}^{d}$和正则树这两种特殊情况,并得到了显式的衰减准则。此外,我们考虑了$\mathbb{Z}^{d}$上Landis猜想的分数阶类似物。我们的方法依赖于离散版本的Liouville比较原理,该原理也在本文中得到了证明。

英文摘要:

In this note we study the Landis conjecture for positive Schrödin\-ger operators on graphs. More precisely, we prove a Landis-type result in the form of a decay criterion that ensures when $\mathcal{H}$-harmonic functions for a positive Schrödinger operator $\mathcal{H}$ with potentials bounded from above by $ 1 $ are trivial. The positivity assumption on the operator allows us to impose slow decay across the entire graph, while requiring fast decay in only one direction, rather than throughout the whole graph. We then specifically look at the special cases of $ \mathbb{Z}^{d} $ and regular trees for which we get a explicit decay criterion. Moreover, we consider the fractional analogue of the Landis conjecture on $ \mathbb{Z}^{d} $. Our approach relies on the discrete version of Liouville comparison principle which is also proved in this article.

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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