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In this article, we study a quantitative form of the Landis conjecture on exponential decay for real-valued solutions to second order elliptic equations with variable coefficients in the plane. In particular, we prove the following…

Analysis of PDEs · Mathematics 2024-01-02 Kévin Le Balc'h , Diego A. Souza

We investigate the quantitative unique continuation properties of solutions to second order elliptic equations with singular lower order terms. The main theorem presents a quantification of the strong unique continuation property for…

Analysis of PDEs · Mathematics 2019-03-12 Blair Davey

We investigate the quantitative unique continuation properties of real-valued solutions to planar Schr\"odinger equations with potential functions that exhibit pointwise decay at infinity. That is, for equations of the form $-\Delta u + V u…

Analysis of PDEs · Mathematics 2025-12-11 Blair Davey

In this article, we continue our investigation into the unique continuation properties of real-valued solutions to elliptic equations in the plane. More precisely, we make another step towards proving a quantitative version of Landis'…

Analysis of PDEs · Mathematics 2018-08-29 Blair Davey , Carlos Kenig , Jenn-Nan Wang

In this article, we investigate the quantitative unique continuation properties of real-valued solutions to elliptic equations in the plane. Under a general set of assumptions on the operator, we establish quantitative forms of Landis'…

Analysis of PDEs · Mathematics 2019-03-12 Blair Davey

In this paper, we study a Landis-type conjecture for the general fractional Schr\"{o}dinger equation $((-P)^{s}+q)u=0$. As a byproduct, we also proved the additivity and boundedness of the linear operator $(-P)^{s}$ for non-smooth…

Analysis of PDEs · Mathematics 2023-09-12 Pu-Zhao Kow

We investigate the quantitative unique continuation properties of real-valued solutions to Schr\"odinger equations in the plane with potentials that exhibit growth at infinity. More precisely, for equations of the form $\Delta u - V u = 0$…

Analysis of PDEs · Mathematics 2023-05-10 Blair Davey

We determine the largest non-trivial rate of exponential decay at infinity for solutions to the Dirac equation \begin{equation*} \mathcal{D}_n \psi + \mathbb{V} \psi = 0 \quad \text{ in }\mathbb{R}^n, \end{equation*} being $\mathcal{D}_n$…

Analysis of PDEs · Mathematics 2019-09-13 Biagio Cassano

We give an index formula for a class of Dirac operators coupled with unbounded potentials. More precisely, we study operators of the form P := D+ V, where D is a Dirac operators and V is an unbounded potential at infinity on a possibly…

K-Theory and Homology · Mathematics 2011-12-30 Catarina Carvalho , Victor Nistor

In this article, we study the quantitative uniqueness of solutions to second order elliptic equations with singular lower order terms. We quantify the strong unique continuation property by estimating the maximal vanishing order of…

Analysis of PDEs · Mathematics 2017-05-24 Blair Davey , Jiuyi Zhu

In this paper, we study the Landis-type conjecture, i.e., unique continuation property from infinity, of the fractional Schr\"{o}dinger equation with drift and potential terms. We show that if any solution of the equation decays at a…

Analysis of PDEs · Mathematics 2023-04-14 Pu-Zhao Kow , Jenn-Nan Wang

We give a sharp upper bound on the vanishing order of solutions to Schrodinger equation with C^1 electric and magnetic potentials on a compact smooth manifold. Our method is based on quantitative Carleman type inequalities developed by…

Analysis of PDEs · Mathematics 2012-03-19 Laurent Bakri , Jean-Baptiste Casteras

We give partial affirmative answers to Landis conjecture in all dimensions for two different types of linear, second order, elliptic operators in a domain $\Omega\subset \mathbb{R}^N$. In particular, we provide a sharp decay criterion that…

Analysis of PDEs · Mathematics 2024-05-21 Ujjal Das , Yehuda Pinchover

We prove a Landis type unique continuation result for positive quasi-linear operators on graphs. Specifically, we give decay criteria that ensures when a harmonic function for a positive quasilinear Schr\"odinger operator with potential…

Analysis of PDEs · Mathematics 2025-09-26 Ujjal Das , Matthias Keller , Yehuda Pinchover

We obtain a unique continuation result at infinity for fully nonlinear elliptic integro-differential operators of order 2s which satisfy the maximum and minimum principles in bounded subdomains, under the decay assumption $o(|x|^{-(N+2s)})$…

Analysis of PDEs · Mathematics 2025-01-03 Sebastián Flores Sepúlveda , Gabrielle Nornberg

In this article, we study the vanishing order of solutions to second order elliptic equations with singular lower order terms in the plane. In particular, we derive lower bounds for solutions on arbitrarily small balls in terms of the…

Analysis of PDEs · Mathematics 2017-04-04 Blair Davey , Jiuyi Zhu

We investigate the quantitative unique continuation properties of solutions to second-order elliptic equations with lower-order terms. In particular, we establish quantitative forms of the strong unique continuation property for solutions…

Analysis of PDEs · Mathematics 2025-11-11 Blair Davey

We establish a strong unique continuation property for the subelliptic Baouendi operator under the presence of zero-order perturbations satisfying an almost Hardy-type growth condition. In particular, the admissible class includes both…

Analysis of PDEs · Mathematics 2026-02-11 Agnid Banerjee , Nicola Garofalo

We study the decay rate of the zero modes of the Dirac operator with a matrix-valued potential that is considered here without any regularity assumptions, compared to the existing literature. For the Dirac operator and for Clifford-valued…

Analysis of PDEs · Mathematics 2025-01-28 Marianna Chatzakou , Uwe Kahler , Michael Ruzhansky

In this paper we study quantitative uniqueness estimates of solutions to general second order elliptic equations with magnetic and electric potentials. We derive lower bounds of decay rate at infinity for any nontrivial solution under some…

Analysis of PDEs · Mathematics 2013-03-12 Ching-Lung Lin , Jenn-Nan Wang
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