## Differential and Integral Equations

- Differential Integral Equations
- Volume 28, Number 3/4 (2015), 271-290.

### A Meshkov-type construction for the borderline case

#### Abstract

We construct functions $u: \mathbb R^2 \to \mathbb C$ that satisfy an elliptic eigenvalue equation of the form $-\Delta u + W \cdot \nabla u + V u = \lambda u$, where $\lambda \in \mathbb C$, and $V$ and $W$ satisfy $| V ({x} ) | \lesssim \langle {x} \rangle ^{-N}$, and $ | W ({x})| \lesssim \langle{x} \rangle ^{-P}$, with $\min\{N, P\} = 1/2$. For $|{x}|$ sufficiently large, these solutions satisfy $|{u(x)}| \lesssim \exp ({- c|{x}|})$. In the author's previous work, examples of solutions over $\mathbb R^2$ were constructed for all $N, P$ such that $\min\{N,P\} \in [0, 1/2)$. These solutions were shown to have the optimal rate of decay at infinity. A recent result of Lin and Wang shows that the constructions presented in this note for the borderline case of $\min\{N, P\} = 1/2$ also have the optimal rate of decay at infinity.

#### Article information

**Source**

Differential Integral Equations, Volume 28, Number 3/4 (2015), 271-290.

**Dates**

First available in Project Euclid: 4 February 2015

**Permanent link to this document**

https://projecteuclid.org/euclid.die/1423055228

**Mathematical Reviews number (MathSciNet)**

MR3306563

**Zentralblatt MATH identifier**

1363.35094

**Subjects**

Primary: 35J10: Schrödinger operator [See also 35Pxx] 35J15: Second-order elliptic equations 35B60: Continuation and prolongation of solutions [See also 58A15, 58A17, 58Hxx]

#### Citation

Davey, Blair. A Meshkov-type construction for the borderline case. Differential Integral Equations 28 (2015), no. 3/4, 271--290. https://projecteuclid.org/euclid.die/1423055228