Existence of groundstates for a class of nonlinear Choquard equations in the plane

Luca Battaglia, Jean Van Schaftingen

Published 2016-04-12Version 1

We prove the existence of a nontrivial groundstate solution for the class of nonlinear Choquard equation $$ -\Delta u+u=(I_\alpha*F(u))F'(u)\qquad\text{in }\mathbb{R}^2, $$ where $I_\alpha$ is the Riesz potential of order $\alpha$ on the plane $\mathbb{R}^2$ under general nontriviality, growth and subcriticality on the nonlinearity $F \in C (\mathbb{R},\mathbb{R})$.